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  • Owner of uploads directory is `www-data` but this prevents FTP access via PHP scripts

    - by letseatfood
    To allow write access to Apache, I needed to chown www-data:www-data /var/www/mysite/uploads to my site's upload folder. This allows me to delete files from the folder via unlink() in a PHP script. Unfortunately, this prevents another PHP script, which uses FTP functions, from working. I think it is because the FTP user is mike and now that the uploads directory is owned by www-data, mike cannot access it. I added mike to the group www-data, but this does not fix the issue. Can somebody advise me on how to allow PHP FTP functions to work in addition to file deletion using PHP's unlink() function?

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  • Application pool crashing regularly (8007006d) (Service Unavailable)

    - by Phil
    I have a basic web form site running. Nothing out of the ordinary. It is frequently crashing the application pool. The error code I got from the logs is '8007006d'. Googling this does not come up with the usual bevy of results.... I do get a few people with a similar problem. Any the advise seems to be that the error is related to registry permissions. Can anyone confirm / disconfirm this theory. That if I get error 8007006d it is definately a reg permissions problem? Here is the code from my page. I'm not seeing anything that would cause a memory leak or make this happen. It is basically just one big insert command with many parameters? Imports System.Web.Configuration Imports System.Data.SqlClient Imports System.Net.Mail Imports System.IO Imports System.Globalization Partial Class _Default Inherits System.Web.UI.Page Public Sub WriteError(ByVal errorMessage As String) Try Dim path As String = "~/Error/" & DateTime.Today.ToString("dd-mm-yy") & ".txt" If (Not File.Exists(System.Web.HttpContext.Current.Server.MapPath(path))) Then File.Create(System.Web.HttpContext.Current.Server.MapPath(path)).Close() End If Using w As StreamWriter = File.AppendText(System.Web.HttpContext.Current.Server.MapPath(path)) w.WriteLine(Constants.vbCrLf & "Log Entry : ") w.WriteLine("{0}", DateTime.Now.ToString(CultureInfo.InvariantCulture)) Dim err As String = "Error in: " & System.Web.HttpContext.Current.Request.Url.ToString() & ". Error Message:" & errorMessage w.WriteLine(err) w.WriteLine("__________________________") w.Flush() w.Close() End Using Catch ex As Exception WriteError(ex.Message) End Try End Sub Protected Sub Page_PreLoad(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreLoad otherlanguagespecify.Text = "Language: Speaking: Reading: Writing:" 'Show / hide 'other' panels ProvincePanel.Visible = False If Province.SelectedValue = "Other" Then ProvincePanel.Visible = True End If languagespanel.Visible = False If OtherLanguage.Checked Then languagespanel.Visible = True End If End Sub Protected Sub Submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Submit.Click Dim areasexpertise As String = String.Empty Dim areasli As ListItem Dim english As String = String.Empty Dim connstring As String = WebConfigurationManager.ConnectionStrings("Str").ToString() Dim c As SqlConnection = New SqlConnection(connstring) Dim s As String = ("INSERT INTO [MBA_EOI]") & _ ("([subdate],[surname], [name], [dob], [nationality], [postaladdress],") & _ ("[province],[city], [postcode], [worktelephone],") & _ ("[hometelephone], [mobile], [email],[fax], [institution1],") & _ ("[institution2], [institution3], [institution4], [institutiondate1], [institutiondate2],") & _ ("[institutiondate3], [institutiondate4],[institutionquals1], [institutionquals2], [institutionquals3],") & _ ("[institutionquals4],[profdates1], [profdates2],") & _ ("[profdates3], [profdates4], [profdates5], [profdates6], [profdates7], ") & _ ("[profloc1], [profloc2], [profloc3], [profloc4], [profloc5],") & _ ("[profloc6], [profloc7], [profcomp1], [profcomp2], [profcomp3],") & _ ("[profcomp4], [profcomp5], [profcomp6], [profcomp7], [profpos1],") & _ ("[profpos2], [profpos3], [profpos4], [profpos5], [profpos6],") & _ ("[profpos7], [profdesc1], [profdesc2], [profdesc3], [profdesc4],") & _ ("[profdesc5],[profdesc6],[profdesc7], [company1], [company2],") & _ ("[company3], [company4], [company5], [nature1], [nature2],") & _ ("[nature3], [nature4], [nature5], [workdate1], [workdate2],") & _ ("[workdate3], [workdate4], [workdate5], [contactname1], [contactname2],") & _ ("[contactname3], [contactname4], [contactname5], [wtelephone1], [wtelephone2],") & _ ("[wtelephone3],[wtelephone4], [wtelephone5], [philosophy], [publications],") & _ ("[english], [otherlanguage], [areasofexpertise], [otherareasofexpertise],") & _ ("[assessortrue], [coordinatortrue], [facilitatortrue], [moderatortrue], [productdevelopertrue],") & _ ("[projectmanagertrue], [assessorexp], [coordinatorexp], [facilitatorexp], [moderatorexp],") & _ ("[productdeveloperexp], [projectmanagerexp], [assessorlvl], [coordinatorlvl], [facilitatorlvl],") & _ ("[moderatorlvl], [productdeveloperlvl], [projectmanagerlvl], [assessorpref], [coordinatorpref],") & _ ("[FacilitatorPref], [ModeratorPref], [ProductDeveloperPref], [ProjectManagerPref], [designation], [professortrue],") & _ ("[professorlvl], [professorexp], [professorpref], [lecturertrue], [lecturerpref], [lecturerlvl], [lecturerexp], [affiliations], [educationmore], ") & _ ("[wemail1], [wemail2], [wemail3], [wemail4], [wemail5])") & _ ("VALUES") & _ ("(@subdate, @surname, @name, @dob, @nationality, @postaladdress,") & _ ("@province,@city, @postcode, @worktelephone,") & _ ("@hometelephone, @mobile, @email, @fax, @inst1,") & _ ("@inst2, @inst3, @inst4, @instdate1, @instdate2,") & _ ("@instdate3, @instdate4, @instquals1, @instquals2, @instquals3,") & _ ("@instquals4, @profdates1, @profdates2,") & _ ("@profdates3, @profdates4, @profdates5, @profdates6, @profdates7,") & _ ("@profloc1, @profloc2, @profloc3, @profloc4, @profloc5,") & _ ("@profloc6, @profloc7, @profcomp1, @profcomp2, @profcomp3,") & _ ("@profcomp4, @profcomp5, @profcomp6, @profcomp7, @profpos1,") & _ ("@profpos1, @profpos1, @profpos4, @profpos5, @profpos6,") & _ ("@profpos7, @profdesc1, @profdesc2, @profdesc3, @profdesc4,") & _ ("@profdesc5, @profdesc6, @profdesc7, @company1, @company2,") & _ ("@company3, @company4, @company5,@nature1, @nature2,") & _ ("@nature3, @nature4, @nature5, @workdate1, @workdate2,") & _ ("@workdate3, @workdate4, @workdate5, @contactname1, @contactname2,") & _ ("@contactname3, @contactname4, @contactname5, @wtelephone1, @wtelephone2,") & _ ("@wtelephone3,@wtelephone4, @wtelephone5, @philosophy, @publications,") & _ ("@english, @otherlanguage, @areasofexpertise, @otherareasofexpertise,") & _ ("@assessor, @coordinator, @facilitator, @moderator, @productdeveloper,") & _ ("@projectmanager, @assessorexp, @coordinatorexp, @facilitatorexp, @moderatorexp,") & _ ("@productdeveloperexp, @projectmanagerexp, @assessorlvl, @coordinatorlvl, @facilitatorlvl,") & _ ("@moderatorlvl, @productdeveloperlvl, @projectmanagerlvl, @assessorpref, @coordinatorpref,") & _ ("@facilitatorpref, @moderatorpref, @productdeveloperpref, @projectmanagerpref, @designation, @professor, @professorlvl, @professorexp, @professorpref,") & _ ("@lecturer, @lecturerpref, @lecturerlvl, @lecturerexp, @affiliations, @educationmore, ") & _ ("@wemail1, @wemail2, @wemail3, @wemail4, @wemail5)") 'Setup birthday Dim birthdaystring As String = MonthBirth.SelectedValue.ToString & "/" & DayBirth.SelectedValue.ToString & "/" & YearBirth.SelectedValue.ToString Dim birthday As DateTime = Convert.ToDateTime(birthdaystring) Try Dim x As New SqlCommand(s, c) x.Parameters.AddWithValue("@subdate", DateTime.Now()) x.Parameters.AddWithValue("@surname", Surname.Text) x.Parameters.AddWithValue("@name", Name.Text) x.Parameters.AddWithValue("@dob", birthday) x.Parameters.AddWithValue("@nationality", Nationality.Text) x.Parameters.AddWithValue("@postaladdress", Postaladdress.Text) x.Parameters.AddWithValue("@designation", Designation.SelectedItem.ToString) 'to control whether or not 'other' province is selected If Province.SelectedValue = "Other" Then x.Parameters.AddWithValue("@province", Otherprovince.Text) Else x.Parameters.AddWithValue("@province", Province.SelectedValue.ToString) End If x.Parameters.AddWithValue("@city", City.Text) x.Parameters.AddWithValue("@postcode", Postcode.Text) x.Parameters.AddWithValue("@worktelephone", Worktelephone.Text) x.Parameters.AddWithValue("@hometelephone", Hometelephone.Text) x.Parameters.AddWithValue("@mobile", Mobile.Text) x.Parameters.AddWithValue("@email", Email.Text) x.Parameters.AddWithValue("@fax", Fax.Text) 'Add education params to x command x.Parameters.AddWithValue("@inst1", Institution1.Text) x.Parameters.AddWithValue("@inst2", Institution2.Text) x.Parameters.AddWithValue("@inst3", Institution3.Text) x.Parameters.AddWithValue("@inst4", Institution4.Text) x.Parameters.AddWithValue("@instdate1", Institutiondates1.Text) x.Parameters.AddWithValue("@instdate2", Institutiondates2.Text) x.Parameters.AddWithValue("@instdate3", Institutiondates3.Text) x.Parameters.AddWithValue("@instdate4", Institutiondates4.Text) x.Parameters.AddWithValue("@instquals1", Institution1quals.Text) x.Parameters.AddWithValue("@instquals2", Institution2quals.Text) x.Parameters.AddWithValue("@instquals3", Institution3quals.Text) x.Parameters.AddWithValue("@instquals4", Institution4quals.Text) 'Add checkbox params to x command Dim eli As ListItem For Each eli In EnglishSkills.Items If eli.Selected Then english += eli.Text + " | " End If Next x.Parameters.AddWithValue("@english", english) For Each areasli In Expertiselist.Items If areasli.Selected Then areasexpertise += " ; " & areasli.Text End If Next x.Parameters.AddWithValue("@areasofexpertise", areasexpertise) If OtherLanguage.Checked.ToString Then x.Parameters.AddWithValue("@otherlanguage", otherlanguagespecify.Text) Else x.Parameters.AddWithValue("@otherlanguage", DBNull.Value) End If 'Add competencies params to x command x.Parameters.AddWithValue("@assessor", AssessorTrue.Checked) x.Parameters.AddWithValue("@coordinator", CoordinatorTrue.Checked) x.Parameters.AddWithValue("@facilitator", FacilitatorTrue.Checked) x.Parameters.AddWithValue("@moderator", ModeratorTrue.Checked) x.Parameters.AddWithValue("@productdeveloper", ProductDeveloperTrue.Checked) x.Parameters.AddWithValue("@projectmanager", ProjectManagerTrue.Checked) x.Parameters.AddWithValue("@assessorexp", Assessorexp.Text) x.Parameters.AddWithValue("@coordinatorexp", coordinatorexp.Text) x.Parameters.AddWithValue("@facilitatorexp", facilitatorexp.Text) x.Parameters.AddWithValue("@moderatorexp", moderatorexp.Text) x.Parameters.AddWithValue("@productdeveloperexp", productdeveloperexp.Text) x.Parameters.AddWithValue("@projectmanagerexp", projectmanagerexp.Text) x.Parameters.AddWithValue("@assessorlvl", Assessorlevel.Text) x.Parameters.AddWithValue("@coordinatorlvl", Coordinatorlevel.Text) x.Parameters.AddWithValue("@facilitatorlvl", Facilitatorlevel.Text) x.Parameters.AddWithValue("@moderatorlvl", Moderatorlevel.Text) x.Parameters.AddWithValue("@productdeveloperlvl", Productdeveloperlevel.Text) x.Parameters.AddWithValue("@projectmanagerlvl", Projectmanagerlevel.Text) x.Parameters.AddWithValue("@assessorpref", AssessorPref.Text) x.Parameters.AddWithValue("@coordinatorpref", CoordinatorPref.Checked) x.Parameters.AddWithValue("@facilitatorpref", FacilitatorPref.Checked) x.Parameters.AddWithValue("@moderatorpref", ModeratorPref.Checked) x.Parameters.AddWithValue("@productdeveloperpref", ProductDeveloperPref.Checked) x.Parameters.AddWithValue("@projectmanagerpref", ProjectManagerPref.Checked) x.Parameters.AddWithValue("@professorpref", ProfessorPref.Checked) x.Parameters.AddWithValue("@professorlvl", Professorlevel.Text) x.Parameters.AddWithValue("@professor", ProfessorTrue.Checked) x.Parameters.AddWithValue("@professorexp", professorexp.Text) x.Parameters.AddWithValue("@lecturerpref", LecturerPref.Checked) x.Parameters.AddWithValue("@lecturerlvl", Lecturerlevel.Text) x.Parameters.AddWithValue("@lecturer", LecturerTrue.Checked) x.Parameters.AddWithValue("@lecturerexp", lecturerexp.Text) 'Add professional experience params to x command x.Parameters.AddWithValue("@profdates1", ProfDates1.Text) x.Parameters.AddWithValue("@profdates2", ProfDates2.Text) x.Parameters.AddWithValue("@profdates3", ProfDates3.Text) x.Parameters.AddWithValue("@profdates4", ProfDates4.Text) x.Parameters.AddWithValue("@profdates5", ProfDates5.Text) x.Parameters.AddWithValue("@profdates6", ProfDates6.Text) x.Parameters.AddWithValue("@profdates7", ProfDates7.Text) x.Parameters.AddWithValue("@profloc1", ProfDates1.Text) x.Parameters.AddWithValue("@profloc2", ProfDates2.Text) x.Parameters.AddWithValue("@profloc3", ProfDates3.Text) x.Parameters.AddWithValue("@profloc4", ProfDates4.Text) x.Parameters.AddWithValue("@profloc5", ProfDates5.Text) x.Parameters.AddWithValue("@profloc6", ProfDates6.Text) x.Parameters.AddWithValue("@profloc7", ProfDates7.Text) x.Parameters.AddWithValue("@profcomp1", ProfCompany1.Text) x.Parameters.AddWithValue("@profcomp2", ProfCompany2.Text) x.Parameters.AddWithValue("@profcomp3", ProfCompany3.Text) x.Parameters.AddWithValue("@profcomp4", ProfCompany4.Text) x.Parameters.AddWithValue("@profcomp5", ProfCompany5.Text) x.Parameters.AddWithValue("@profcomp6", ProfCompany6.Text) x.Parameters.AddWithValue("@profcomp7", ProfCompany7.Text) x.Parameters.AddWithValue("@profpos1", Profpos1.Text) x.Parameters.AddWithValue("@profpos2", Profpos2.Text) x.Parameters.AddWithValue("@profpos3", Profpos3.Text) x.Parameters.AddWithValue("@profpos4", Profpos4.Text) x.Parameters.AddWithValue("@profpos5", Profpos5.Text) x.Parameters.AddWithValue("@profpos6", Profpos6.Text) x.Parameters.AddWithValue("@profpos7", Profpos7.Text) x.Parameters.AddWithValue("@profdesc1", ProfDesc1.Text) x.Parameters.AddWithValue("@profdesc2", ProfDesc2.Text) x.Parameters.AddWithValue("@profdesc3", ProfDesc2.Text) x.Parameters.AddWithValue("@profdesc4", ProfDesc4.Text) x.Parameters.AddWithValue("@profdesc5", ProfDesc5.Text) x.Parameters.AddWithValue("@profdesc6", ProfDesc6.Text) x.Parameters.AddWithValue("@profdesc7", ProfDesc7.Text) 'Add references parameters to x command x.Parameters.AddWithValue("@company1", company1.Text) x.Parameters.AddWithValue("@company2", company2.Text) x.Parameters.AddWithValue("@company3", company3.Text) x.Parameters.AddWithValue("@company4", company4.Text) x.Parameters.AddWithValue("@company5", company5.Text) x.Parameters.AddWithValue("@nature1", natureofwork1.Text) x.Parameters.AddWithValue("@nature2", natureofwork2.Text) x.Parameters.AddWithValue("@nature3", natureofwork3.Text) x.Parameters.AddWithValue("@nature4", natureofwork4.Text) x.Parameters.AddWithValue("@nature5", natureofwork5.Text) x.Parameters.AddWithValue("@workdate1", workdate1.Text) x.Parameters.AddWithValue("@workdate2", workdate2.Text) x.Parameters.AddWithValue("@workdate3", workdate3.Text) x.Parameters.AddWithValue("@workdate4", workdate4.Text) x.Parameters.AddWithValue("@workdate5", workdate5.Text) x.Parameters.AddWithValue("@contactname1", ContactName1.Text) x.Parameters.AddWithValue("@contactname2", ContactName2.Text) x.Parameters.AddWithValue("@contactname3", ContactName3.Text) x.Parameters.AddWithValue("@contactname4", ContactName4.Text) x.Parameters.AddWithValue("@contactname5", ContactName5.Text) x.Parameters.AddWithValue("@wtelephone1", Telephone1.Text) x.Parameters.AddWithValue("@wtelephone2", Telephone2.Text) x.Parameters.AddWithValue("@wtelephone3", Telephone3.Text) x.Parameters.AddWithValue("@wtelephone4", Telephone4.Text) x.Parameters.AddWithValue("@wtelephone5", Telephone5.Text) x.Parameters.AddWithValue("@wemail1", Email1.Text) x.Parameters.AddWithValue("@wemail2", Email2.Text) x.Parameters.AddWithValue("@wemail3", Email3.Text) x.Parameters.AddWithValue("@wemail4", Email4.Text) x.Parameters.AddWithValue("@wemail5", Email5.Text) 'Add other areas of expertise parameter x.Parameters.AddWithValue("@otherareasofexpertise", Otherareasofexpertise.Text) 'Add philosophy / pubs / affils comands to x command x.Parameters.AddWithValue("@philosophy", learningphilosophy.Text) x.Parameters.AddWithValue("@publications", publicationdetails.Text) x.Parameters.AddWithValue("@affiliations", affiliations.Text) x.Parameters.AddWithValue("@educationmore", educationmore.Text) c.Open() x.ExecuteNonQuery() c.Close() Catch ex As Exception WriteError(ex.ToString) End Try 'If everyone is happy, redirect to thank you page If (Page.IsValid) Then Response.Redirect("Thanks.aspx") End If End Sub End Class

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  • Using the West Wind Web Toolkit to set up AJAX and REST Services

    - by Rick Strahl
    I frequently get questions about which option to use for creating AJAX and REST backends for ASP.NET applications. There are many solutions out there to do this actually, but when I have a choice - not surprisingly - I fall back to my own tools in the West Wind West Wind Web Toolkit. I've talked a bunch about the 'in-the-box' solutions in the past so for a change in this post I'll talk about the tools that I use in my own and customer applications to handle AJAX and REST based access to service resources using the West Wind West Wind Web Toolkit. Let me preface this by saying that I like things to be easy. Yes flexible is very important as well but not at the expense of over-complexity. The goal I've had with my tools is make it drop dead easy, with good performance while providing the core features that I'm after, which are: Easy AJAX/JSON Callbacks Ability to return any kind of non JSON content (string, stream, byte[], images) Ability to work with both XML and JSON interchangeably for input/output Access endpoints via POST data, RPC JSON calls, GET QueryString values or Routing interface Easy to use generic JavaScript client to make RPC calls (same syntax, just what you need) Ability to create clean URLS with Routing Ability to use standard ASP.NET HTTP Stack for HTTP semantics It's all about options! In this post I'll demonstrate most of these features (except XML) in a few simple and short samples which you can download. So let's take a look and see how you can build an AJAX callback solution with the West Wind Web Toolkit. Installing the Toolkit Assemblies The easiest and leanest way of using the Toolkit in your Web project is to grab it via NuGet: West Wind Web and AJAX Utilities (Westwind.Web) and drop it into the project by right clicking in your Project and choosing Manage NuGet Packages from anywhere in the Project.   When done you end up with your project looking like this: What just happened? Nuget added two assemblies - Westwind.Web and Westwind.Utilities and the client ww.jquery.js library. It also added a couple of references into web.config: The default namespaces so they can be accessed in pages/views and a ScriptCompressionModule that the toolkit optionally uses to compress script resources served from within the assembly (namely ww.jquery.js and optionally jquery.js). Creating a new Service The West Wind Web Toolkit supports several ways of creating and accessing AJAX services, but for this post I'll stick to the lower level approach that works from any plain HTML page or of course MVC, WebForms, WebPages. There's also a WebForms specific control that makes this even easier but I'll leave that for another post. So, to create a new standalone AJAX/REST service we can create a new HttpHandler in the new project either as a pure class based handler or as a generic .ASHX handler. Both work equally well, but generic handlers don't require any web.config configuration so I'll use that here. In the root of the project add a Generic Handler. I'm going to call this one StockService.ashx. Once the handler has been created, edit the code and remove all of the handler body code. Then change the base class to CallbackHandler and add methods that have a [CallbackMethod] attribute. Here's the modified base handler implementation now looks like with an added HelloWorld method: using System; using Westwind.Web; namespace WestWindWebAjax { /// <summary> /// Handler implements CallbackHandler to provide REST/AJAX services /// </summary> public class SampleService : CallbackHandler { [CallbackMethod] public string HelloWorld(string name) { return "Hello " + name + ". Time is: " + DateTime.Now.ToString(); } } } Notice that the class inherits from CallbackHandler and that the HelloWorld service method is marked up with [CallbackMethod]. We're done here. Services Urlbased Syntax Once you compile, the 'service' is live can respond to requests. All CallbackHandlers support input in GET and POST formats, and can return results as JSON or XML. To check our fancy HelloWorld method we can now access the service like this: http://localhost/WestWindWebAjax/StockService.ashx?Method=HelloWorld&name=Rick which produces a default JSON response - in this case a string (wrapped in quotes as it's JSON): (note by default JSON will be downloaded by most browsers not displayed - various options are available to view JSON right in the browser) If I want to return the same data as XML I can tack on a &format=xml at the end of the querystring which produces: <string>Hello Rick. Time is: 11/1/2011 12:11:13 PM</string> Cleaner URLs with Routing Syntax If you want cleaner URLs for each operation you can also configure custom routes on a per URL basis similar to the way that WCF REST does. To do this you need to add a new RouteHandler to your application's startup code in global.asax.cs one for each CallbackHandler based service you create: protected void Application_Start(object sender, EventArgs e) { CallbackHandlerRouteHandler.RegisterRoutes<StockService>(RouteTable.Routes); } With this code in place you can now add RouteUrl properties to any of your service methods. For the HelloWorld method that doesn't make a ton of sense but here is what a routed clean URL might look like in definition: [CallbackMethod(RouteUrl="stocks/HelloWorld/{name}")] public string HelloWorld(string name) { return "Hello " + name + ". Time is: " + DateTime.Now.ToString(); } The same URL I previously used now becomes a bit shorter and more readable with: http://localhost/WestWindWebAjax/HelloWorld/Rick It's an easy way to create cleaner URLs and still get the same functionality. Calling the Service with $.getJSON() Since the result produced is JSON you can now easily consume this data using jQuery's getJSON method. First we need a couple of scripts - jquery.js and ww.jquery.js in the page: <!DOCTYPE html> <html> <head> <link href="Css/Westwind.css" rel="stylesheet" type="text/css" /> <script src="scripts/jquery.min.js" type="text/javascript"></script> <script src="scripts/ww.jquery.min.js" type="text/javascript"></script> </head> <body> Next let's add a small HelloWorld example form (what else) that has a single textbox to type a name, a button and a div tag to receive the result: <fieldset> <legend>Hello World</legend> Please enter a name: <input type="text" name="txtHello" id="txtHello" value="" /> <input type="button" id="btnSayHello" value="Say Hello (POST)" /> <input type="button" id="btnSayHelloGet" value="Say Hello (GET)" /> <div id="divHelloMessage" class="errordisplay" style="display:none;width: 450px;" > </div> </fieldset> Then to call the HelloWorld method a little jQuery is used to hook the document startup and the button click followed by the $.getJSON call to retrieve the data from the server. <script type="text/javascript"> $(document).ready(function () { $("#btnSayHelloGet").click(function () { $.getJSON("SampleService.ashx", { Method: "HelloWorld", name: $("#txtHello").val() }, function (result) { $("#divHelloMessage") .text(result) .fadeIn(1000); }); });</script> .getJSON() expects a full URL to the endpoint of our service, which is the ASHX file. We can either provide a full URL (SampleService.ashx?Method=HelloWorld&name=Rick) or we can just provide the base URL and an object that encodes the query string parameters for us using an object map that has a property that matches each parameter for the server method. We can also use the clean URL routing syntax, but using the object parameter encoding actually is safer as the parameters will get properly encoded by jQuery. The result returned is whatever the result on the server method is - in this case a string. The string is applied to the divHelloMessage element and we're done. Obviously this is a trivial example, but it demonstrates the basics of getting a JSON response back to the browser. AJAX Post Syntax - using ajaxCallMethod() The previous example allows you basic control over the data that you send to the server via querystring parameters. This works OK for simple values like short strings, numbers and boolean values, but doesn't really work if you need to pass something more complex like an object or an array back up to the server. To handle traditional RPC type messaging where the idea is to map server side functions and results to a client side invokation, POST operations can be used. The easiest way to use this functionality is to use ww.jquery.js and the ajaxCallMethod() function. ww.jquery wraps jQuery's AJAX functions and knows implicitly how to call a CallbackServer method with parameters and parse the result. Let's look at another simple example that posts a simple value but returns something more interesting. Let's start with the service method: [CallbackMethod(RouteUrl="stocks/{symbol}")] public StockQuote GetStockQuote(string symbol) { Response.Cache.SetExpires(DateTime.UtcNow.Add(new TimeSpan(0, 2, 0))); StockServer server = new StockServer(); var quote = server.GetStockQuote(symbol); if (quote == null) throw new ApplicationException("Invalid Symbol passed."); return quote; } This sample utilizes a small StockServer helper class (included in the sample) that downloads a stock quote from Yahoo's financial site via plain HTTP GET requests and formats it into a StockQuote object. Lets create a small HTML block that lets us query for the quote and display it: <fieldset> <legend>Single Stock Quote</legend> Please enter a stock symbol: <input type="text" name="txtSymbol" id="txtSymbol" value="msft" /> <input type="button" id="btnStockQuote" value="Get Quote" /> <div id="divStockDisplay" class="errordisplay" style="display:none; width: 450px;"> <div class="label-left">Company:</div> <div id="stockCompany"></div> <div class="label-left">Last Price:</div> <div id="stockLastPrice"></div> <div class="label-left">Quote Time:</div> <div id="stockQuoteTime"></div> </div> </fieldset> The final result looks something like this:   Let's hook up the button handler to fire the request and fill in the data as shown: $("#btnStockQuote").click(function () { ajaxCallMethod("SampleService.ashx", "GetStockQuote", [$("#txtSymbol").val()], function (quote) { $("#divStockDisplay").show().fadeIn(1000); $("#stockCompany").text(quote.Company + " (" + quote.Symbol + ")"); $("#stockLastPrice").text(quote.LastPrice); $("#stockQuoteTime").text(quote.LastQuoteTime.formatDate("MMM dd, HH:mm EST")); }, onPageError); }); So we point at SampleService.ashx and the GetStockQuote method, passing a single parameter of the input symbol value. Then there are two handlers for success and failure callbacks.  The success handler is the interesting part - it receives the stock quote as a result and assigns its values to various 'holes' in the stock display elements. The data that comes back over the wire is JSON and it looks like this: { "Symbol":"MSFT", "Company":"Microsoft Corpora", "OpenPrice":26.11, "LastPrice":26.01, "NetChange":0.02, "LastQuoteTime":"2011-11-03T02:00:00Z", "LastQuoteTimeString":"Nov. 11, 2011 4:20pm" } which is an object representation of the data. JavaScript can evaluate this JSON string back into an object easily and that's the reslut that gets passed to the success function. The quote data is then applied to existing page content by manually selecting items and applying them. There are other ways to do this more elegantly like using templates, but here we're only interested in seeing how the data is returned. The data in the object is typed - LastPrice is a number and QuoteTime is a date. Note about the date value: JavaScript doesn't have a date literal although the JSON embedded ISO string format used above  ("2011-11-03T02:00:00Z") is becoming fairly standard for JSON serializers. However, JSON parsers don't deserialize dates by default and return them by string. This is why the StockQuote actually returns a string value of LastQuoteTimeString for the same date. ajaxMethodCallback always converts dates properly into 'real' dates and the example above uses the real date value along with a .formatDate() data extension (also in ww.jquery.js) to display the raw date properly. Errors and Exceptions So what happens if your code fails? For example if I pass an invalid stock symbol to the GetStockQuote() method you notice that the code does this: if (quote == null) throw new ApplicationException("Invalid Symbol passed."); CallbackHandler automatically pushes the exception message back to the client so it's easy to pick up the error message. Regardless of what kind of error occurs: Server side, client side, protocol errors - any error will fire the failure handler with an error object parameter. The error is returned to the client via a JSON response in the error callback. In the previous examples I called onPageError which is a generic routine in ww.jquery that displays a status message on the bottom of the screen. But of course you can also take over the error handling yourself: $("#btnStockQuote").click(function () { ajaxCallMethod("SampleService.ashx", "GetStockQuote", [$("#txtSymbol").val()], function (quote) { $("#divStockDisplay").fadeIn(1000); $("#stockCompany").text(quote.Company + " (" + quote.Symbol + ")"); $("#stockLastPrice").text(quote.LastPrice); $("#stockQuoteTime").text(quote.LastQuoteTime.formatDate("MMM dd, hh:mmt")); }, function (error, xhr) { $("#divErrorDisplay").text(error.message).fadeIn(1000); }); }); The error object has a isCallbackError, message and  stackTrace properties, the latter of which is only populated when running in Debug mode, and this object is returned for all errors: Client side, transport and server side errors. Regardless of which type of error you get the same object passed (as well as the XHR instance optionally) which makes for a consistent error retrieval mechanism. Specifying HttpVerbs You can also specify HTTP Verbs that are allowed using the AllowedHttpVerbs option on the CallbackMethod attribute: [CallbackMethod(AllowedHttpVerbs=HttpVerbs.GET | HttpVerbs.POST)] public string HelloWorld(string name) { … } If you're building REST style API's this might be useful to force certain request semantics onto the client calling. For the above if call with a non-allowed HttpVerb the request returns a 405 error response along with a JSON (or XML) error object result. The default behavior is to allow all verbs access (HttpVerbs.All). Passing in object Parameters Up to now the parameters I passed were very simple. But what if you need to send something more complex like an object or an array? Let's look at another example now that passes an object from the client to the server. Keeping with the Stock theme here lets add a method called BuyOrder that lets us buy some shares for a stock. Consider the following service method that receives an StockBuyOrder object as a parameter: [CallbackMethod] public string BuyStock(StockBuyOrder buyOrder) { var server = new StockServer(); var quote = server.GetStockQuote(buyOrder.Symbol); if (quote == null) throw new ApplicationException("Invalid or missing stock symbol."); return string.Format("You're buying {0} shares of {1} ({2}) stock at {3} for a total of {4} on {5}.", buyOrder.Quantity, quote.Company, quote.Symbol, quote.LastPrice.ToString("c"), (quote.LastPrice * buyOrder.Quantity).ToString("c"), buyOrder.BuyOn.ToString("MMM d")); } public class StockBuyOrder { public string Symbol { get; set; } public int Quantity { get; set; } public DateTime BuyOn { get; set; } public StockBuyOrder() { BuyOn = DateTime.Now; } } This is a contrived do-nothing example that simply echoes back what was passed in, but it demonstrates how you can pass complex data to a callback method. On the client side we now have a very simple form that captures the three values on a form: <fieldset> <legend>Post a Stock Buy Order</legend> Enter a symbol: <input type="text" name="txtBuySymbol" id="txtBuySymbol" value="GLD" />&nbsp;&nbsp; Qty: <input type="text" name="txtBuyQty" id="txtBuyQty" value="10" style="width: 50px" />&nbsp;&nbsp; Buy on: <input type="text" name="txtBuyOn" id="txtBuyOn" value="<%= DateTime.Now.ToString("d") %>" style="width: 70px;" /> <input type="button" id="btnBuyStock" value="Buy Stock" /> <div id="divStockBuyMessage" class="errordisplay" style="display:none"></div> </fieldset> The completed form and demo then looks something like this:   The client side code that picks up the input values and assigns them to object properties and sends the AJAX request looks like this: $("#btnBuyStock").click(function () { // create an object map that matches StockBuyOrder signature var buyOrder = { Symbol: $("#txtBuySymbol").val(), Quantity: $("#txtBuyQty").val() * 1, // number Entered: new Date() } ajaxCallMethod("SampleService.ashx", "BuyStock", [buyOrder], function (result) { $("#divStockBuyMessage").text(result).fadeIn(1000); }, onPageError); }); The code creates an object and attaches the properties that match the server side object passed to the BuyStock method. Each property that you want to update needs to be included and the type must match (ie. string, number, date in this case). Any missing properties will not be set but also not cause any errors. Pass POST data instead of Objects In the last example I collected a bunch of values from form variables and stuffed them into object variables in JavaScript code. While that works, often times this isn't really helping - I end up converting my types on the client and then doing another conversion on the server. If lots of input controls are on a page and you just want to pick up the values on the server via plain POST variables - that can be done too - and it makes sense especially if you're creating and filling the client side object only to push data to the server. Let's add another method to the server that once again lets us buy a stock. But this time let's not accept a parameter but rather send POST data to the server. Here's the server method receiving POST data: [CallbackMethod] public string BuyStockPost() { StockBuyOrder buyOrder = new StockBuyOrder(); buyOrder.Symbol = Request.Form["txtBuySymbol"]; ; int qty; int.TryParse(Request.Form["txtBuyQuantity"], out qty); buyOrder.Quantity = qty; DateTime time; DateTime.TryParse(Request.Form["txtBuyBuyOn"], out time); buyOrder.BuyOn = time; // Or easier way yet //FormVariableBinder.Unbind(buyOrder,null,"txtBuy"); var server = new StockServer(); var quote = server.GetStockQuote(buyOrder.Symbol); if (quote == null) throw new ApplicationException("Invalid or missing stock symbol."); return string.Format("You're buying {0} shares of {1} ({2}) stock at {3} for a total of {4} on {5}.", buyOrder.Quantity, quote.Company, quote.Symbol, quote.LastPrice.ToString("c"), (quote.LastPrice * buyOrder.Quantity).ToString("c"), buyOrder.BuyOn.ToString("MMM d")); } Clearly we've made this server method take more code than it did with the object parameter. We've basically moved the parameter assignment logic from the client to the server. As a result the client code to call this method is now a bit shorter since there's no client side shuffling of values from the controls to an object. $("#btnBuyStockPost").click(function () { ajaxCallMethod("SampleService.ashx", "BuyStockPost", [], // Note: No parameters - function (result) { $("#divStockBuyMessage").text(result).fadeIn(1000); }, onPageError, // Force all page Form Variables to be posted { postbackMode: "Post" }); }); The client simply calls the BuyStockQuote method and pushes all the form variables from the page up to the server which parses them instead. The feature that makes this work is one of the options you can pass to the ajaxCallMethod() function: { postbackMode: "Post" }); which directs the function to include form variable POST data when making the service call. Other options include PostNoViewState (for WebForms to strip out WebForms crap vars), PostParametersOnly (default), None. If you pass parameters those are always posted to the server except when None is set. The above code can be simplified a bit by using the FormVariableBinder helper, which can unbind form variables directly into an object: FormVariableBinder.Unbind(buyOrder,null,"txtBuy"); which replaces the manual Request.Form[] reading code. It receives the object to unbind into, a string of properties to skip, and an optional prefix which is stripped off form variables to match property names. The component is similar to the MVC model binder but it's independent of MVC. Returning non-JSON Data CallbackHandler also supports returning non-JSON/XML data via special return types. You can return raw non-JSON encoded strings like this: [CallbackMethod(ReturnAsRawString=true,ContentType="text/plain")] public string HelloWorldNoJSON(string name) { return "Hello " + name + ". Time is: " + DateTime.Now.ToString(); } Calling this method results in just a plain string - no JSON encoding with quotes around the result. This can be useful if your server handling code needs to return a string or HTML result that doesn't fit well for a page or other UI component. Any string output can be returned. You can also return binary data. Stream, byte[] and Bitmap/Image results are automatically streamed back to the client. Notice that you should set the ContentType of the request either on the CallbackMethod attribute or using Response.ContentType. This ensures the Web Server knows how to display your binary response. Using a stream response makes it possible to return any of data. Streamed data can be pretty handy to return bitmap data from a method. The following is a method that returns a stock history graph for a particular stock over a provided number of years: [CallbackMethod(ContentType="image/png",RouteUrl="stocks/history/graph/{symbol}/{years}")] public Stream GetStockHistoryGraph(string symbol, int years = 2,int width = 500, int height=350) { if (width == 0) width = 500; if (height == 0) height = 350; StockServer server = new StockServer(); return server.GetStockHistoryGraph(symbol,"Stock History for " + symbol,width,height,years); } I can now hook this up into the JavaScript code when I get a stock quote. At the end of the process I can assign the URL to the service that returns the image into the src property and so force the image to display. Here's the changed code: $("#btnStockQuote").click(function () { var symbol = $("#txtSymbol").val(); ajaxCallMethod("SampleService.ashx", "GetStockQuote", [symbol], function (quote) { $("#divStockDisplay").fadeIn(1000); $("#stockCompany").text(quote.Company + " (" + quote.Symbol + ")"); $("#stockLastPrice").text(quote.LastPrice); $("#stockQuoteTime").text(quote.LastQuoteTime.formatDate("MMM dd, hh:mmt")); // display a stock chart $("#imgStockHistory").attr("src", "stocks/history/graph/" + symbol + "/2"); },onPageError); }); The resulting output then looks like this: The charting code uses the new ASP.NET 4.0 Chart components via code to display a bar chart of the 2 year stock data as part of the StockServer class which you can find in the sample download. The ability to return arbitrary data from a service is useful as you can see - in this case the chart is clearly associated with the service and it's nice that the graph generation can happen off a handler rather than through a page. Images are common resources, but output can also be PDF reports, zip files for downloads etc. which is becoming increasingly more common to be returned from REST endpoints and other applications. Why reinvent? Obviously the examples I've shown here are pretty basic in terms of functionality. But I hope they demonstrate the core features of AJAX callbacks that you need to work through in most applications which is simple: return data, send back data and potentially retrieve data in various formats. While there are other solutions when it comes down to making AJAX callbacks and servicing REST like requests, I like the flexibility my home grown solution provides. Simply put it's still the easiest solution that I've found that addresses my common use cases: AJAX JSON RPC style callbacks Url based access XML and JSON Output from single method endpoint XML and JSON POST support, querystring input, routing parameter mapping UrlEncoded POST data support on callbacks Ability to return stream/raw string data Essentially ability to return ANYTHING from Service and pass anything All these features are available in various solutions but not together in one place. I've been using this code base for over 4 years now in a number of projects both for myself and commercial work and it's served me extremely well. Besides the AJAX functionality CallbackHandler provides, it's also an easy way to create any kind of output endpoint I need to create. Need to create a few simple routines that spit back some data, but don't want to create a Page or View or full blown handler for it? Create a CallbackHandler and add a method or multiple methods and you have your generic endpoints.  It's a quick and easy way to add small code pieces that are pretty efficient as they're running through a pretty small handler implementation. I can have this up and running in a couple of minutes literally without any setup and returning just about any kind of data. Resources Download the Sample NuGet: Westwind Web and AJAX Utilities (Westwind.Web) ajaxCallMethod() Documentation Using the AjaxMethodCallback WebForms Control West Wind Web Toolkit Home Page West Wind Web Toolkit Source Code © Rick Strahl, West Wind Technologies, 2005-2011Posted in ASP.NET  jQuery  AJAX   Tweet (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • Silverlight Cream for May 19, 2010 -- #865

    - by Dave Campbell
    In this Issue: Michael Washington, Mike Snow(-2-), Justin Angel(-2-), Jeremy Likness, and David Kelley. Shoutout: Erik Mork and crew have their latest up: Silverlight Week – Silverlight Android? From SilverlightCream.com: Simple Silverlight 4 Example Using oData and RX Extensions Michael Washington has a follow-on tutorial up on ViewModel, Rx, and lashed up to OData... good detailed tutorial with external links for more information. Silverlight Tip of the Day #21 – Animation Easing Mike Snow has a couple new tips up -- this first one is about easing... great diagrams to help visualize and a cool demo application to boot. Silverlight Tip of the Day #22 – Data Validation Mike Snow's second tip (#22) is about validation and again he has a great demo app on the post. Windows Phone 7 - Emulator Automation Justin Angel has a WP7 post up about Automating the emulator... and in the process, loading the emulator from something other than VS2010... lots of good information. TFS2010 WP7 Continuous Integration Justin Angel hinted at continuous integration for WP7 in the last post, and he pays off with this one... even without all the bits installed on the build server. Making the ScrollViewer Talk in Silverlight 4 Jeremy Likness tried to respond to a user query about knowing when a user scrolled to the bottom of a ScrollViewer... Jeremy resolved it by listening to the right property. MEF (Microsoft Extensibility Framework) made simple (ish) David Kelley is discussing MEF and using a real-world example while doing so. Good discussion and code available in his code browser app... check thecomments. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for June 22, 2011 -- #1111

    - by Dave Campbell
    In this Issue: Kunal Chowdhury, Beth Massi, Mike Taulty, Xpert360, and Erno de Weerd. Above the Fold: Silverlight: "Silverlight, HTML and the WebBrowser Control for Offline Apps" Mike Taulty WP7: "Windows Phone 7 (Mango) Tutorial - 18 - Know about various Phone Tasks" Kunal Chowdhury LightSwitch: "How to Create a Simple Audit Trail (Change Log) in LightSwitch" Beth Massi From SilverlightCream.com: Windows Phone 7 (Mango) Tutorial - 18 - Know about various Phone Tasks Kunal Chowdhury has number 18 in his Mango series up and is discussing WP7.1 Microsoft.Phone.Tasks namespace classes How to Create a Simple Audit Trail (Change Log) in LightSwitch Beth Massi's latest is a demo of building an audit trail to track changes to records in LightSwitch Silverlight, HTML and the WebBrowser Control for Offline Apps Mike Taulty takes a good hard look at the WebBrowser control ... and all the permutations and gyrations. If you're using or going to use this control, you definitely want to read this article. PivotViewer Shorts Part 5: Invert Facet Category Selections Xpert360 has his 5th tutorial up on PivotViewer, covering the topic of inverting the facet category's selections... per reader request. Windows Phone 7: Drawing graphics for your application with Inkscape – Part III: Backgrounds Erno de Weerd has his 3rd tutorial in his series using Inkscape to draw graphics for your WP7 app... this one is on Background images, and staying within in the Marketplace guidelines of course Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Objective-C SSL Synchronous Connection

    - by Mike
    Hello, I'm a little new to objective-C but have run across a problem that I can't solve, mostly because I'm not sure I am implementing the solution correctly. I am trying to connect using a Synchronous Connection to a https site with a self-signed certificate. I am getting the Error Domain=NSURLErrorDomain Code=-1202 "untrusted server certificate" Error that I have seen some solutions to on this forum. The solution i found was to add: - (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace { return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]; } (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge { [challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge]; } to the NSURLDelegate to accept all certificates. When I connect to the site using just a: NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://examplesite.com/"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; It works fine and I see the challenge being accepted. However when I try to connect using the synchronous connection I still get the error and I don't see the challenge functions being called when I put in logging. How can I get the synchronous connection to use the challenge methods? Is it something to do with the delegate:self part of the URLConnection? I also have logging for sending/receiving data within the NSURLDelegate that is called by my connection function but not by the synchronous function. What I am using for the synchronous part: NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:@"https://examplesite.com/"]]; [request setHTTPMethod: @"POST"]; [request setHTTPBody: [[NSString stringWithString:@"username=mike"] dataUsingEncoding: NSUTF8StringEncoding]]; dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSLog(@"%@", error); stringReply = [[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding]; NSLog(@"%@", stringReply); [stringReply release]; NSLog(@"Done"); Like I mentioned I'm a little new to objective C so be kind :) Thanks for any help. Mike

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  • How to build an android test app with a dependency on another app using ant?

    - by Mike
    I have a module called MyApp, and another module called MyAppTests which has a dependency on MyApp. Both modules produce APKs, one named MyApp.apk and the other MyAppTests.apk. I normally build these in IntelliJ or Eclipse, but I'd like to create an ant buildfile for them for the purpose of continuous integration. I used "android update" to create a buildfile for MyApp, and thanks to commonsware's answer to my previous question I've been able to build it successfully using ant. I'd now like to build MyAppTests.apk using ant. I constructed the buildfile as before using "android update", but when I run it I get an error indicating that it's not finding any of the classes in MyApp. Taking a que from my previous question, I tried putting MyApp.apk into my MyAppTests/libs, but unfortunately that didn't miraculously solve the problem. What's the best way to build a test app APK using ant when it depends on classes in another APK? $ ant debug Buildfile: build.xml [setup] Project Target: Google APIs [setup] Vendor: Google Inc. [setup] Platform Version: 1.5 [setup] API level: 3 [setup] WARNING: No minSdkVersion value set. Application will install on all Android versions. dirs: [echo] Creating output directories if needed... resource-src: [echo] Generating R.java / Manifest.java from the resources... aidl: [echo] Compiling aidl files into Java classes... compile: [javac] Compiling 5 source files to /Users/mike/Projects/myapp/android/MyAppTests/bin/classes [javac] /Users/mike/Projects/myapp/android/MyAppTests/src/com/myapp/test/GsonTest.java:3: cannot find symbol [javac] symbol : class MyApplication [javac] location: package com.myapp [javac] import com.myapp.MyApplication; [javac] ^

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  • R: Why does read.table stop reading a file?

    - by Mike Dewar
    I have a file, called genes.txt, which I'd like to become a data.frame. It's got a lot of lines, each line has three, tab delimited fields: mike$ wc -l genes.txt 42476 genes.txt I'd like to read this file into a data.frame in R. I use the command read.table, like this: genes = read.table( genes_file, sep="\t", na.strings="-", fill=TRUE, col.names=c("GeneSymbol","synonyms","description") ) Which seems to work fine, where genes_file points at genes.txt. However, the number of lines in my data.frame is significantly less than the number of lines in my text file: > nrow(genes) [1] 27896 and things I can find in the text file: mike$ grep "SELL" genes.txt SELL CD62L|LAM1|LECAM1|LEU8|LNHR|LSEL|LYAM1|PLNHR|TQ1 selectin L don't seem to be in the data.frame > grep("SELL",genes$GeneSymbol) integer(0) it turns out that genes = read.delim( genes_file, header=FALSE, na.strings="-", fill=TRUE, col.names=c("GeneSymbol","synonyms","description"), ) works just fine. Why does read.delim work when read.table not? If it's of use, you can recreate genes.txt using the following commands which you should run from a command line curl -O ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/gene_info.gz gzip -cd gene_info.gz | awk -Ft '$1==9606{print $3 "\t" $5 "\t" $9}' > genes.txt be warned, though, that gene_info.gz is 101MBish.

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  • ASP.NET Frameworks and Raw Throughput Performance

    - by Rick Strahl
    A few days ago I had a curious thought: With all these different technologies that the ASP.NET stack has to offer, what's the most efficient technology overall to return data for a server request? When I started this it was mere curiosity rather than a real practical need or result. Different tools are used for different problems and so performance differences are to be expected. But still I was curious to see how the various technologies performed relative to each just for raw throughput of the request getting to the endpoint and back out to the client with as little processing in the actual endpoint logic as possible (aka Hello World!). I want to clarify that this is merely an informal test for my own curiosity and I'm sharing the results and process here because I thought it was interesting. It's been a long while since I've done any sort of perf testing on ASP.NET, mainly because I've not had extremely heavy load requirements and because overall ASP.NET performs very well even for fairly high loads so that often it's not that critical to test load performance. This post is not meant to make a point  or even come to a conclusion which tech is better, but just to act as a reference to help understand some of the differences in perf and give a starting point to play around with this yourself. I've included the code for this simple project, so you can play with it and maybe add a few additional tests for different things if you like. Source Code on GitHub I looked at this data for these technologies: ASP.NET Web API ASP.NET MVC WebForms ASP.NET WebPages ASMX AJAX Services  (couldn't get AJAX/JSON to run on IIS8 ) WCF Rest Raw ASP.NET HttpHandlers It's quite a mixed bag, of course and the technologies target different types of development. What started out as mere curiosity turned into a bit of a head scratcher as the results were sometimes surprising. What I describe here is more to satisfy my curiosity more than anything and I thought it interesting enough to discuss on the blog :-) First test: Raw Throughput The first thing I did is test raw throughput for the various technologies. This is the least practical test of course since you're unlikely to ever create the equivalent of a 'Hello World' request in a real life application. The idea here is to measure how much time a 'NOP' request takes to return data to the client. So for this request I create the simplest Hello World request that I could come up for each tech. Http Handler The first is the lowest level approach which is an HTTP handler. public class Handler : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; context.Response.Write("Hello World. Time is: " + DateTime.Now.ToString()); } public bool IsReusable { get { return true; } } } WebForms Next I added a couple of ASPX pages - one using CodeBehind and one using only a markup page. The CodeBehind page simple does this in CodeBehind without any markup in the ASPX page: public partial class HelloWorld_CodeBehind : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Response.Write("Hello World. Time is: " + DateTime.Now.ToString() ); Response.End(); } } while the Markup page only contains some static output via an expression:<%@ Page Language="C#" AutoEventWireup="false" CodeBehind="HelloWorld_Markup.aspx.cs" Inherits="AspNetFrameworksPerformance.HelloWorld_Markup" %> Hello World. Time is <%= DateTime.Now %> ASP.NET WebPages WebPages is the freestanding Razor implementation of ASP.NET. Here's the simple HelloWorld.cshtml page:Hello World @DateTime.Now WCF REST WCF REST was the token REST implementation for ASP.NET before WebAPI and the inbetween step from ASP.NET AJAX. I'd like to forget that this technology was ever considered for production use, but I'll include it here. Here's an OperationContract class: [ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class WcfService { [OperationContract] [WebGet] public Stream HelloWorld() { var data = Encoding.Unicode.GetBytes("Hello World" + DateTime.Now.ToString()); var ms = new MemoryStream(data); // Add your operation implementation here return ms; } } WCF REST can return arbitrary results by returning a Stream object and a content type. The code above turns the string result into a stream and returns that back to the client. ASP.NET AJAX (ASMX Services) I also wanted to test ASP.NET AJAX services because prior to WebAPI this is probably still the most widely used AJAX technology for the ASP.NET stack today. Unfortunately I was completely unable to get this running on my Windows 8 machine. Visual Studio 2012  removed adding of ASP.NET AJAX services, and when I tried to manually add the service and configure the script handler references it simply did not work - I always got a SOAP response for GET and POST operations. No matter what I tried I always ended up getting XML results even when explicitly adding the ScriptHandler. So, I didn't test this (but the code is there - you might be able to test this on a Windows 7 box). ASP.NET MVC Next up is probably the most popular ASP.NET technology at the moment: MVC. Here's the small controller: public class MvcPerformanceController : Controller { public ActionResult Index() { return View(); } public ActionResult HelloWorldCode() { return new ContentResult() { Content = "Hello World. Time is: " + DateTime.Now.ToString() }; } } ASP.NET WebAPI Next up is WebAPI which looks kind of similar to MVC. Except here I have to use a StringContent result to return the response: public class WebApiPerformanceController : ApiController { [HttpGet] public HttpResponseMessage HelloWorldCode() { return new HttpResponseMessage() { Content = new StringContent("Hello World. Time is: " + DateTime.Now.ToString(), Encoding.UTF8, "text/plain") }; } } Testing Take a minute to think about each of the technologies… and take a guess which you think is most efficient in raw throughput. The fastest should be pretty obvious, but the others - maybe not so much. The testing I did is pretty informal since it was mainly to satisfy my curiosity - here's how I did this: I used Apache Bench (ab.exe) from a full Apache HTTP installation to run and log the test results of hitting the server. ab.exe is a small executable that lets you hit a URL repeatedly and provides counter information about the number of requests, requests per second etc. ab.exe and the batch file are located in the \LoadTests folder of the project. An ab.exe command line  looks like this: ab.exe -n100000 -c20 http://localhost/aspnetperf/api/HelloWorld which hits the specified URL 100,000 times with a load factor of 20 concurrent requests. This results in output like this:   It's a great way to get a quick and dirty performance summary. Run it a few times to make sure there's not a large amount of varience. You might also want to do an IISRESET to clear the Web Server. Just make sure you do a short test run to warm up the server first - otherwise your first run is likely to be skewed downwards. ab.exe also allows you to specify headers and provide POST data and many other things if you want to get a little more fancy. Here all tests are GET requests to keep it simple. I ran each test: 100,000 iterations Load factor of 20 concurrent connections IISReset before starting A short warm up run for API and MVC to make sure startup cost is mitigated Here is the batch file I used for the test: IISRESET REM make sure you add REM C:\Program Files (x86)\Apache Software Foundation\Apache2.2\bin REM to your path so ab.exe can be found REM Warm up ab.exe -n100 -c20 http://localhost/aspnetperf/MvcPerformance/HelloWorldJsonab.exe -n100 -c20 http://localhost/aspnetperf/api/HelloWorldJson ab.exe -n100 -c20 http://localhost/AspNetPerf/WcfService.svc/HelloWorld ab.exe -n100000 -c20 http://localhost/aspnetperf/handler.ashx > handler.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/HelloWorld_CodeBehind.aspx > AspxCodeBehind.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/HelloWorld_Markup.aspx > AspxMarkup.txt ab.exe -n100000 -c20 http://localhost/AspNetPerf/WcfService.svc/HelloWorld > Wcf.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/MvcPerformance/HelloWorldCode > Mvc.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/api/HelloWorld > WebApi.txt I ran each of these tests 3 times and took the average score for Requests/second, with the machine otherwise idle. I did see a bit of variance when running many tests but the values used here are the medians. Part of this has to do with the fact I ran the tests on my local machine - result would probably more consistent running the load test on a separate machine hitting across the network. I ran these tests locally on my laptop which is a Dell XPS with quad core Sandibridge I7-2720QM @ 2.20ghz and a fast SSD drive on Windows 8. CPU load during tests ran to about 70% max across all 4 cores (IOW, it wasn't overloading the machine). Ideally you can try running these tests on a separate machine hitting the local machine. If I remember correctly IIS 7 and 8 on client OSs don't throttle so the performance here should be Results Ok, let's cut straight to the chase. Below are the results from the tests… It's not surprising that the handler was fastest. But it was a bit surprising to me that the next fastest was WebForms and especially Web Forms with markup over a CodeBehind page. WebPages also fared fairly well. MVC and WebAPI are a little slower and the slowest by far is WCF REST (which again I find surprising). As mentioned at the start the raw throughput tests are not overly practical as they don't test scripting performance for the HTML generation engines or serialization performances of the data engines. All it really does is give you an idea of the raw throughput for the technology from time of request to reaching the endpoint and returning minimal text data back to the client which indicates full round trip performance. But it's still interesting to see that Web Forms performs better in throughput than either MVC, WebAPI or WebPages. It'd be interesting to try this with a few pages that actually have some parsing logic on it, but that's beyond the scope of this throughput test. But what's also amazing about this test is the sheer amount of traffic that a laptop computer is handling. Even the slowest tech managed 5700 requests a second, which is one hell of a lot of requests if you extrapolate that out over a 24 hour period. Remember these are not static pages, but dynamic requests that are being served. Another test - JSON Data Service Results The second test I used a JSON result from several of the technologies. I didn't bother running WebForms and WebPages through this test since that doesn't make a ton of sense to return data from the them (OTOH, returning text from the APIs didn't make a ton of sense either :-) In these tests I have a small Person class that gets serialized and then returned to the client. The Person class looks like this: public class Person { public Person() { Id = 10; Name = "Rick"; Entered = DateTime.Now; } public int Id { get; set; } public string Name { get; set; } public DateTime Entered { get; set; } } Here are the updated handler classes that use Person: Handler public class Handler : IHttpHandler { public void ProcessRequest(HttpContext context) { var action = context.Request.QueryString["action"]; if (action == "json") JsonRequest(context); else TextRequest(context); } public void TextRequest(HttpContext context) { context.Response.ContentType = "text/plain"; context.Response.Write("Hello World. Time is: " + DateTime.Now.ToString()); } public void JsonRequest(HttpContext context) { var json = JsonConvert.SerializeObject(new Person(), Formatting.None); context.Response.ContentType = "application/json"; context.Response.Write(json); } public bool IsReusable { get { return true; } } } This code adds a little logic to check for a action query string and route the request to an optional JSON result method. To generate JSON, I'm using the same JSON.NET serializer (JsonConvert.SerializeObject) used in Web API to create the JSON response. WCF REST   [ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class WcfService { [OperationContract] [WebGet] public Stream HelloWorld() { var data = Encoding.Unicode.GetBytes("Hello World " + DateTime.Now.ToString()); var ms = new MemoryStream(data); // Add your operation implementation here return ms; } [OperationContract] [WebGet(ResponseFormat=WebMessageFormat.Json,BodyStyle=WebMessageBodyStyle.WrappedRequest)] public Person HelloWorldJson() { // Add your operation implementation here return new Person(); } } For WCF REST all I have to do is add a method with the Person result type.   ASP.NET MVC public class MvcPerformanceController : Controller { // // GET: /MvcPerformance/ public ActionResult Index() { return View(); } public ActionResult HelloWorldCode() { return new ContentResult() { Content = "Hello World. Time is: " + DateTime.Now.ToString() }; } public JsonResult HelloWorldJson() { return Json(new Person(), JsonRequestBehavior.AllowGet); } } For MVC all I have to do for a JSON response is return a JSON result. ASP.NET internally uses JavaScriptSerializer. ASP.NET WebAPI public class WebApiPerformanceController : ApiController { [HttpGet] public HttpResponseMessage HelloWorldCode() { return new HttpResponseMessage() { Content = new StringContent("Hello World. Time is: " + DateTime.Now.ToString(), Encoding.UTF8, "text/plain") }; } [HttpGet] public Person HelloWorldJson() { return new Person(); } [HttpGet] public HttpResponseMessage HelloWorldJson2() { var response = new HttpResponseMessage(HttpStatusCode.OK); response.Content = new ObjectContent<Person>(new Person(), GlobalConfiguration.Configuration.Formatters.JsonFormatter); return response; } } Testing and Results To run these data requests I used the following ab.exe commands:REM JSON RESPONSES ab.exe -n100000 -c20 http://localhost/aspnetperf/Handler.ashx?action=json > HandlerJson.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/MvcPerformance/HelloWorldJson > MvcJson.txt ab.exe -n100000 -c20 http://localhost/aspnetperf/api/HelloWorldJson > WebApiJson.txt ab.exe -n100000 -c20 http://localhost/AspNetPerf/WcfService.svc/HelloWorldJson > WcfJson.txt The results from this test run are a bit interesting in that the WebAPI test improved performance significantly over returning plain string content. Here are the results:   The performance for each technology drops a little bit except for WebAPI which is up quite a bit! From this test it appears that WebAPI is actually significantly better performing returning a JSON response, rather than a plain string response. Snag with Apache Benchmark and 'Length Failures' I ran into a little snag with Apache Benchmark, which was reporting failures for my Web API requests when serializing. As the graph shows performance improved significantly from with JSON results from 5580 to 6530 or so which is a 15% improvement (while all others slowed down by 3-8%). However, I was skeptical at first because the WebAPI test reports showed a bunch of errors on about 10% of the requests. Check out this report: Notice the Failed Request count. What the hey? Is WebAPI failing on roughly 10% of requests when sending JSON? Turns out: No it's not! But it took some sleuthing to figure out why it reports these failures. At first I thought that Web API was failing, and so to make sure I re-ran the test with Fiddler attached and runiisning the ab.exe test by using the -X switch: ab.exe -n100 -c10 -X localhost:8888 http://localhost/aspnetperf/api/HelloWorldJson which showed that indeed all requests where returning proper HTTP 200 results with full content. However ab.exe was reporting the errors. After some closer inspection it turned out that the dates varying in size altered the response length in dynamic output. For example: these two results: {"Id":10,"Name":"Rick","Entered":"2012-09-04T10:57:24.841926-10:00"} {"Id":10,"Name":"Rick","Entered":"2012-09-04T10:57:24.8519262-10:00"} are different in length for the number which results in 68 and 69 bytes respectively. The same URL produces different result lengths which is what ab.exe reports. I didn't notice at first bit the same is happening when running the ASHX handler with JSON.NET result since it uses the same serializer that varies the milliseconds. Moral: You can typically ignore Length failures in Apache Benchmark and when in doubt check the actual output with Fiddler. Note that the other failure values are accurate though. Another interesting Side Note: Perf drops over Time As I was running these tests repeatedly I was finding that performance steadily dropped from a startup peak to a 10-15% lower stable level. IOW, with Web API I'd start out with around 6500 req/sec and in subsequent runs it keeps dropping until it would stabalize somewhere around 5900 req/sec occasionally jumping lower. For these tests this is why I did the IIS RESET and warm up for individual tests. This is a little puzzling. Looking at Process Monitor while the test are running memory very quickly levels out as do handles and threads, on the first test run. Subsequent runs everything stays stable, but the performance starts going downwards. This applies to all the technologies - Handlers, Web Forms, MVC, Web API - curious to see if others test this and see similar results. Doing an IISRESET then resets everything and performance starts off at peak again… Summary As I stated at the outset, these were informal to satiate my curiosity not to prove that any technology is better or even faster than another. While there clearly are differences in performance the differences (other than WCF REST which was by far the slowest and the raw handler which was by far the highest) are relatively minor, so there is no need to feel that any one technology is a runaway standout in raw performance. Choosing a technology is about more than pure performance but also about the adequateness for the job and the easy of implementation. The strengths of each technology will make for any minor performance difference we see in these tests. However, to me it's important to get an occasional reality check and compare where new technologies are heading. Often times old stuff that's been optimized and designed for a time of less horse power can utterly blow the doors off newer tech and simple checks like this let you compare. Luckily we're seeing that much of the new stuff performs well even in V1.0 which is great. To me it was very interesting to see Web API perform relatively badly with plain string content, which originally led me to think that Web API might not be properly optimized just yet. For those that caught my Tweets late last week regarding WebAPI's slow responses was with String content which is in fact considerably slower. Luckily where it counts with serialized JSON and XML WebAPI actually performs better. But I do wonder what would make generic string content slower than serialized code? This stresses another point: Don't take a single test as the final gospel and don't extrapolate out from a single set of tests. Certainly Twitter can make you feel like a fool when you post something immediate that hasn't been fleshed out a little more <blush>. Egg on my face. As a result I ended up screwing around with this for a few hours today to compare different scenarios. Well worth the time… I hope you found this useful, if not for the results, maybe for the process of quickly testing a few requests for performance and charting out a comparison. Now onwards with more serious stuff… Resources Source Code on GitHub Apache HTTP Server Project (ab.exe is part of the binary distribution)© Rick Strahl, West Wind Technologies, 2005-2012Posted in ASP.NET  Web Api   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • Content Challenge: You Can Only Get it Here

    - by Mike Stiles
    Part of the content conundrum for brands is figuring out what kind of content customers would find cool, desirable, and relevant. The mere fact many brands have no idea what this content might be is, in itself, pretty alarming. You’d have to have a pretty thorough lack of involvement with and understanding of your customers to not know what they might like. But despite what should be a great awakening in which consumers are using every technology and trick in the book to shield themselves from ads and commercials, brand self-obsession continues as marketers concentrate on their message, their campaign, what they want to say, and what they want social users to do. When individuals conduct themselves in that same fashion on Facebook and Twitter, it gets tiresome and starts losing value pretty quickly. Their posts eventually get hidden. Conversely, friends who post things that consistently entertain or inform, with little self-marketing desperation involved, win the coveted “show all updates” setting. Of course brands are going to use social to market. It’s pretty much the point of having social in the marketing mix. And yes, people who follow a brand’s Twitter account or “Like” a brand’s Facebook Page implicitly state they want to know what’s going on with that brand’s products and services. But if you have a Facebook friend that assumes you want every one of her posts to be about what wine she likes (Mitsubishi’s current campaign is even based around weeding out pretentious Facebook friends, then running them over), then you know how it must feel for your fans and followers to get a sales pitch for your crackers or whatever you’re selling every single time. Is there such a thing as content that doesn’t sell but that still advances the brand and makes the consumer more involved and valuable? Of course. And perhaps there are no better companies than enterprise brands to do it. Enterprise organizations are large enough to go beyond a product and engage readers/viewers at higher, broader levels…communicating expertise across entire sectors, subjects and industries. You’re going from pitchman to news source, and getting full credit for it as the presenter. A recent GigaOM article pointed out the success a San Francisco-based startup called Crunchyroll is having. Their niche (and they proudly admit it’s a niche) is providing Japanese anime, Korean drama and Asian live action content to countries that can’t get it any other way via licensing deals. Shows are available in HD and on the same day they air in the host country. Crunchyroll not only gets 8 million viewers a month, they have 100,000 paying subscribers at $7-12/month. Got a point, Mike? I do happen to have one. Crunchyroll illustrates the content opportunity enterprise companies have…which is to determine your “area,” the interest graph of your customers, then provide content that speaks to and satisfies those interests that can’t be found anywhere else. At least not in the same style, or of the same quality, or with the same authority. Do what no one else is doing. Provide what no one else is providing in your sector. If underserved users are willing to pay monthly for access to awkwardly moving cartoon dragons, imagine the audience you could attract with free, useful, non-sales content in your customers’ area of interest. It’s an audience you’ll want in place when the time does come to put out that marketing message. A content challenge is better than a content conundrum any day.

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  • Guaranteed Restore Points as Fallback Method

    - by Mike Dietrich
    Thanks to the great audience yesterday in the Upgrade & Migration Workshop in Utrecht. That was really fun and I was amazed by our new facilities (and the  "wellness" lights surrounding the plenum room's walls). And another reason why I like to do these workshops is that often I learn new things from you So credits here to Rick van  Ek who has highlighted the following topic to me. Yesterday (and in some previous workshops) I did mention during the discussion about Fallback Strategies that you'll have to switch on Flashback Database beforehand to create a guaranteed restore point in case you'll encounter an issue during the database upgrade. I knew that we've made it possible since Oracle Database 11.2 to switch Flashback Database on without taking the database into MOUNT status (you could switch it off anyway while the database is open before in all releases). But before Oracle Database 11.2 that did require MOUNT status. SQL> create restore point rp1 guarantee flashback database ; create restore point rp1 guarantee flashback database * ERROR at line 1: ORA-38784: Cannot create restore point 'RP1'. ORA-38787: Creating the first guaranteed restore point requires mount mode when flashback database is off. But Rick did mention that I won't need to switch Flashback Database On to create a guaranteed restore point. And he's right - in older releases I would have had to go into MOUNT state to define the restore point which meant to restart the database. But in 11.2 that's no necessary anymore. And the same will apply when you upgrade your pre-11.2 database (e.g. an Oracle Database 10.2.0.4) to Oracle Database 11.2. As soon as you start your "old" not-yet-upgraded database in your 11.2 environment with STARTUP UPGRADE you can define a guaranteed restore point. If you tail the alert.log you'll see that the database will start the RVWR (Recovery Writer) background process - you'll just have to make sure that you'd define the values for db_recovery_file_dest_size and db_recovery_file_dest. SQL> startup upgrade ORACLE instance started. Total System Global Area  417546240 bytes Fixed Size                  2228944 bytes Variable Size             134221104 bytes Database Buffers          272629760 bytes Redo Buffers                8466432 bytes Database mounted. Database opened. SQL> create restore point grpt guarantee flashback database; Restore point created.SQL> drop restore point grpt; And don't forget to drop that restore point the sooner or later as it is guaranteed - and will fill up your Fast Recovery Area pretty quickly Just on the side: in any case archivelog mode is required if you'd like to work with restore points. - Mike

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  • Using Enums for comparing string values in Switch

    - by kaleidoscope
    Problem Scenario: There is an enum keeping track of operations to be performed on a table Public Enum PartitionKey { Createtask, Updatetask, Deletetask } User is entering the value for the operation to be performed and the code to check the value entered in switch case. Switch (value) {           case PartitionKey.Createtask.ToString():          {          Create();          break;          }          case PartitionKey.Updatetask.ToString():          {           Update();           break;          }          case PartitionKey.Deletetask.ToString():          {           Delete();          break;          } } and it displays as error as “.” Solution: One of the possible implmentation is as below. Public Enum PartitionKey: byte { Createtask, Updatetask, Deletetask } Switch ((PartitionKey)(Int32.Parse(value))) {          case PartitionKey.Createtask:          {                   Create();                   break;          }          case PartitionKey.Updatetask:          {                    Update();                   break;          }          case PartitionKey.Deletetask:          {                    Delete();                   break;          }          default:          {                   break;          } } Technorati Tags: Enum,A Constant Value is required,Geeta,C#

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  • Synchronized Property Changes (Part 4)

    - by Geertjan
    The next step is to activate the undo/redo functionality... for a Node. Something I've not seen done before. I.e., when the Node is renamed via F2 on the Node, the "Undo/Redo" buttons should start working. Here is the start of the solution, via this item in the mailing list and Timon Veenstra's BeanNode class, note especially the items in bold: public class ShipNode extends BeanNode implements PropertyChangeListener, UndoRedo.Provider { private final InstanceContent ic; private final ShipSaveCapability saveCookie; private UndoRedo.Manager manager; private String oldDisplayName; private String newDisplayName; private Ship ship; public ShipNode(Ship bean) throws IntrospectionException { this(bean, new InstanceContent()); } private ShipNode(Ship bean, InstanceContent ic) throws IntrospectionException { super(bean, Children.LEAF, new ProxyLookup(new AbstractLookup(ic), Lookups.singleton(bean))); this.ic = ic; setDisplayName(bean.getType()); setShortDescription(String.valueOf(bean.getYear())); saveCookie = new ShipSaveCapability(bean); bean.addPropertyChangeListener(WeakListeners.propertyChange(this, bean)); } @Override public Action[] getActions(boolean context) { List<? extends Action> shipActions = Utilities.actionsForPath("Actions/Ship"); return shipActions.toArray(new Action[shipActions.size()]); } protected void fire(boolean modified) { if (modified) { ic.add(saveCookie); } else { ic.remove(saveCookie); } } @Override public UndoRedo getUndoRedo() { manager = Lookup.getDefault().lookup( UndoRedo.Manager.class); return manager; } private class ShipSaveCapability implements SaveCookie { private final Ship bean; public ShipSaveCapability(Ship bean) { this.bean = bean; } @Override public void save() throws IOException { StatusDisplayer.getDefault().setStatusText("Saving..."); fire(false); } } @Override public boolean canRename() { return true; } @Override public void setName(String newDisplayName) { Ship c = getLookup().lookup(Ship.class); oldDisplayName = c.getType(); c.setType(newDisplayName); fireNameChange(oldDisplayName, newDisplayName); fire(true); fireUndoableEvent("type", ship, oldDisplayName, newDisplayName); } public void fireUndoableEvent(String property, Ship source, Object oldValue, Object newValue) { ReUndoableEdit reUndoableEdit = new ReUndoableEdit( property, source, oldValue, newValue); UndoableEditEvent undoableEditEvent = new UndoableEditEvent( this, reUndoableEdit); manager.undoableEditHappened(undoableEditEvent); } private class ReUndoableEdit extends AbstractUndoableEdit { private Object oldValue; private Object newValue; private Ship source; private String property; public ReUndoableEdit(String property, Ship source, Object oldValue, Object newValue) { super(); this.oldValue = oldValue; this.newValue = newValue; this.source = source; this.property = property; } @Override public void undo() throws CannotUndoException { setName(oldValue.toString()); } @Override public void redo() throws CannotRedoException { setName(newValue.toString()); } } @Override public String getDisplayName() { Ship c = getLookup().lookup(Ship.class); if (null != c.getType()) { return c.getType(); } return super.getDisplayName(); } @Override public String getShortDescription() { Ship c = getLookup().lookup(Ship.class); if (null != String.valueOf(c.getYear())) { return String.valueOf(c.getYear()); } return super.getShortDescription(); } @Override public void propertyChange(PropertyChangeEvent evt) { if (evt.getPropertyName().equals("type")) { String oldDisplayName = evt.getOldValue().toString(); String newDisplayName = evt.getNewValue().toString(); fireDisplayNameChange(oldDisplayName, newDisplayName); } else if (evt.getPropertyName().equals("year")) { String oldToolTip = evt.getOldValue().toString(); String newToolTip = evt.getNewValue().toString(); fireShortDescriptionChange(oldToolTip, newToolTip); } fire(true); } } Undo works when rename is done, but Redo never does, because Undo is constantly activated, since it is reactivated whenever there is a name change. And why must the UndoRedoManager be retrieved from the Lookup (it doesn't work otherwise)? Don't get that part of the code either. Help welcome!

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  • C# compile error for simple Annual Salary Calculator

    - by Mike Vignapiano
    I am new to C# and trying to create my 1st app. I have 3 errors. The first two say that txtSalary and Salary do not exist. The 3rd says that it cannot convert method group 'ToString' to non-delegate type 'string'. and asks if I intend to invoke the method. Here is what I have: protected void Button1_Click(object sender, EventArgs e) { int salary, AnnualHours, Rate; string txtAnnualHours, txtSalary, txtRate; salary = AnnualHours * Rate; txtsalary = int.Parse(Salary); txtAnnualHours = salary.ToString; MessageBox.Show(salary); } According to my book, when you enter numerics in AnnualHours and Rate textbox, when click Button1, these values are converted from string to integers, then multiplied for salary. Then numeric answer converted to string and displayed in messagebox named txtSalary. Please show me what I got wrong because according to the book, I am not missing anything.

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  • How can I assign a DBNull in a better way?

    - by Mike
    Hi, I need to parse value from a datarow and assign it to another datarow.If the input is valid, then I need to parse it to double or else add a dbnull value to the output.I'm doing the following, is there a better way to do it? public double? GetVolume(object data) { string colValue = data == null ? string.Empty : data.ToString(); double volume; if (!Double.TryParse(colValue.ToString(), out volume)) { return null; } return volume; } public void Assign(DataRow theRowInput,DataRow theRowOutput) { double? volume = GetVolume(theRowInput[0]); if(volumne.HasValue) theRowOutput[0] = volume.value; else theRowOutput[0] = DbNull.Value; return theRowOutput; } Thanks, -M

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  • Silverlight Cream for December 16, 2010 -- #1011

    - by Dave Campbell
    In this Issue: John Papa, Tim Heuer, Jeff Blankenburg(-2-, -3-), Jesse Liberty, Jay Kimble, Wei-Meng Lee, Paul Sheriff, Mike Snow(-2-, -3-), Samuel Jack, James Ashley, and Peter Kuhn. Above the Fold: Silverlight: "Animation Texture Creator" Peter Kuhn WP7: "dows Phone from Scratch #13 — Custom Behaviors Part II: ActionTrigger" Jesse Liberty Shoutouts: Awesome blog post by Jesse Liberty about writing in general: Ten Requirements For Tutorials, Videos, Demos and White Papers That Don’t Suck From SilverlightCream.com: 1000 Silverlight Cream Posts and Counting! John Papa has Silverlight TV number 55 up and it's an inverview he did with me the day before the Firestarter in December... thanks John... great job in making me not look stooopid :) Silverlight service release today - 4.0.51204 Tim Heuer announced a service release of Silverlight ... check out his blog for the updates and near the bottom is a link to the developer runtime. What I Learned In WP7 – Issue #3 Jeff Blankenburg has been pushing out tips ... number 3 consisted of 3 good pieces of info for WP7 devs including more info about fonts and a good site for free audio files What I Learned In WP7 – Issue #4 In number 4, Jeff Blankenburg talks about where to get some nice free WP7 icons, and a link to a cool article on getting all sorts of device info What I Learned In WP7 – Issue #5 Number 5 finds Jeff Blankenburg giving up the XAP for a CodeMash sessiondata app... or wait for it to appear in the Marketplace next week. Windows Phone from Scratch #13 — Custom Behaviors Part II: ActionTrigger Wow... Jesse Liberty is up to number 13 in his Windows Phone from scratch series... this time it's part 2 of his Custom Behaviors post, and ActionTriggers specifically. Solving the Storage Problem in WP7 (for CF Developers) Jay Kimble has released his WP7 dropbox client to the wild ... this is cool for loading files at run-time... opens up some ideas for me at least. Building Location Service Apps in Windows Phone 7 Wei-Meng Lee has a big informative post on location services in WP7... getting a Bing Maps API key, getting the data, navigating and manipulating the map, adding pushpins... good stuff Using Xml Files on Windows Phone Paul Sheriff is discussing XML files as a database for your WP7 apps via LINQ to XML. Sample code included. ABC–Win7 App Mike Snow has been busy with Tips of the Day ... he published a children's app for tracing their ABC's and discusses some of the code bits involved. Win7 Mobile Application Bar – AG_E_PARSER_BAD_PROPERTY_VALUE Mike Snow's next post is about the infamous AG_E_PARSER_BAD_PROPERTY_VALUE error or worse in WP7 ... how he got it, and how he fixed it... could save you some hair... Forward Navigation on the Windows Phone Mike Snow's latest post is about forward navigation on the WP7 ... oh wait... there isn't any... check out the post. Day 2 of my “3 days to Build a Windows Phone 7 Game” challenge Samuel Jack details about 9 hours in day 2 of his quest to build an XNA app for WP7 from a cold start. Windows Phone 7 Side Loading James Ashley has a really complete write-up on side-loading apps onto your WP7 device. Don't get excited... this isn't a hack... this is instructions for side-loading using the Microsoft-approved methos, which means a registered device. Animation Texture Creator Remember Peter Kuhn's post the other day about an Animation Texture Creator? ... well today he has some added tweaks and the source code! ... thanks Peter! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for January 13, 2011 -- #1026

    - by Dave Campbell
    In this Issue: András Velvárt, Tony Champion, Joost van Schaik, Jesse Liberty, Shawn Wildermuth, John Papa, Michael Crump, Sacha Barber, Alex Knight, Peter Kuhn, Senthil Kumar, Mike Hole, and WindowsPhoneGeek. Above the Fold: Silverlight: "Create Custom Speech Bubbles in Silverlight." Michael Crump WP7: "Architecting WP7 - Part 9 of 10: Threading" Shawn Wildermuth Expression Blend: "PathListBox: Text on the path" Alex Knight From SilverlightCream.com: Behaviors for accessing the Windows Phone 7 MarketPlace and getting feedback András Velvárt shares almost insider information about how to get some user interaction with your WP7 app in the form of feedback ... he has 4 behaviors taken straight from his very cool SufCube app that he's sharing. Reloading a Collection in the PivotViewer Tony Champion keeps working with the PivotViewer ... this time discussing the fact that you can't Reload or Refresh the current collection from the server ... at least not initially, but he did find one :) Tombstoning MVVMLight ViewModels with SilverlightSerializer on Windows Phone 7 Joost van Schaik takes a shot at helping us all with Tombstoning a WP7 app... he's using Mike Talbot's SilverlightSerializer and created extension methods for it for tombstoning that he's willing to share with us. Windows Phone From Scratch #17: MVVM Light Toolkit Soup To Nuts Part 2 Jesse Liberty is up to Part 17 in his WP7 series, and this is the 2nd post on MVVMLight and WP7, and is digging into behaviors. Architecting WP7 - Part 9 of 10: Threading Shawn Wildermuth is up to part 9 of 10 in his series on Architecting WP7 apps. This episode finds Shawn discussing Threading ... know how to use and choose between BackgroundWorker and ThreadPool? ... Shawn will explain. Silverlight TV 57: Performance Tuning Your Apps In the latest Silverlight TV, John Papa chats with Mike Cook about tuning your Silverlight app to get the performance up there where your users will be happy. Create Custom Speech Bubbles in Silverlight. Michael Crump's already gotten a lot of airplay out of this, but it's so cool.. comic-style callout shapes without using the dlls that you normally would... in other words, paths, and very cool hand-drawn looks on some too... very cool, Michael! Showcasing Cinch MVVM framework / PRISM 4 interoperability Sacha Barber has a post up on CodeProject that demonstratest using Cinch and Prism4 together... handily using MEF since Cinch relies on MEFedMVVM... this is a heck of a post... lots of code, lots of explanations. PathListBox: Text on the path Alex Knight keeps making this PathListBox series better ... this time he is putting text on the path... moving text... too cool, Alex! Windows Phone 7: Pinch Gesture Sample Peter Kuhn digs into the WP7 toolkit and examines GestureListener, pinch events, and clipping... examples and code supplied. How to change the StartPage of the Windows Phone 7 Application in Visual Studio 2010 ? Senthil Kumar discusses how to change the StartPage of your WP7 app, or get the program running if you happen to move or rename MainPage.xaml WP7 Text Boxes – OnEnter (my 1st Behaviour) Mike Hole has a post up about the issue with the keyboard appearing in front of the textbox, and maybe using the enter key to drop it... and he's developed a behavior for that process. WP7 ContextMenu in depth | Part1: key concepts and API WindowsPhoneGeek has some good articles that I haven't posted, but I'll catch up. This one is a nice tutorial on the WP7 Context menu... good explanation, diagrams, and code. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • News you can use, PeopleTools gems at OpenWorld 2012

    - by PeopleTools Strategy
    Here are some of the sessions which may not have caught your eyes during your scheduling of events you would like to attend at this year's Open World! CON9183 PeopleSoft Technology Roadmap Jeff Robbins Mon, Oct 1 4:45 PM Moscone West, Room 3002/4 Jeff's session is always very well attended. Come to hear, and see, what's going to be delivered in the new release and get some thoughts on where PeopleTools and the industry is heading. CON9186 Delivering a Ground-Breaking User Interface with PeopleTools Matt Haavisto Steve Elcock Wed, Oct 3 3:30 PM Moscone West, Room 3009 This session will be wonderfully engaging for participants.  As part of our demonstration, audience members will be able to interact live and real-time with our demo using their smart phones and tablets as if you are users of the system. CON9188 A Great User Experience via PeopleSoft Applications Portal Matt Haavisto Jim Marion Pramod Agrawal Mon, Oct 1 12:15 PM Moscone West, Room 3009 This session covers not only the PeopleSoft Portal, but new features like Workcenters and Dashboards, and how they all work together to form the PeopleSoft ecosystem. CON9192 Implementing a PeopleSoft Maintenance Strategy with My Update Manager Mike Thompson Mike Krajicek Tue, Oct 2 1:15 PM Moscone West, Room 3009 The LCM development team will show Oracle's My Update Manager for PeopleSoft and how it drastically simplifies deciding what updates are required for your specific environment. CON9193 Understanding PeopleSoft Maintenance Tools & How They Fit Together Mike Krajicek Wed, Oct 3 10:15 AM Moscone West, Room 3002/4 Learn about the portfolio of maintenance tools including some of the latest enhancements such as Oracle's My Update Manager for PeopleSoft, Application Data Sets, and the PeopleSoft Test Framework, and see what they can do for you. CON9200 PeopleTools Product Team Panel Discussion Jeff Robbins Willie Suh Virad Gupta Ravi Shankar Mike Krajicek Wed, Oct 3 5:00 PM Moscone West, Room 3009 Attend this session to engage in an open discussion with key members of Oracle's PeopleTools senior management team. You will be able to ask questions, hear their thoughts, and gain their insight into the PeopleTools product direction. CON9205 Securing Your PeopleSoft Integration Infrastructure Greg Kelly Keith Collins Tue, Oct 2 10:15 AM Moscone West, Room 3011 This session, with the senior integration developer, will outline Oracle's best practices for securing your integration infrastructure so that you know your web services and REST services are as secure as the rest of your PeopleSoft environment. CON9210 Performance Tuning for the PeopleSoft Administrator Tim Bower David Kurtz Mon, Oct 1 10:45 AM Moscone West, Room 3009 Meet long time technical consultants with deep knowledge of system tuning, Tim Bower of the Center of Excellence and David Kurtz, author of "PeopleSoft for the Oracle DBA". System administrators new to tuning a PeopleSoft environment as well as seasoned experts will come away with new techniques that will help them improve the performance of their PeopleSoft system. CON9055 Advanced Management of Oracle PeopleSoft with Oracle Enterprise Manager Greg Kelly Milten Garia Greg Bouras Thurs Oct 4 12:45 PM Moscone West, Room 3009 This promises to be a really interesting session as Milten Garia from CSU discusses lessons learned during the implementation of Oracle's Enterprise Manager with the PeopleSoft plug-in across a multi campus environment. There are some surprising things about Solaris 10 and the Bourne shell. Some creative work by the Unix administrators so the well tried scripts and system replication processes were largely unaffected. CON8932 New Functional PeopleTools Capabilities for the Line of Business User Jeff Robbins Tues, Oct 2 5:00 PM Moscone West, Room 3007 Using PeopleTools 8.5x capabilities like: related content, embedded help, pivot grids, hover-over, and more, Jeff will discuss how these can deliver business value and innovation which will positively impact your business without the high costs associated with upgrading your PeopleSoft applications. Check out a more detailed list here. We look forward to meeting you all there!

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  • Where Facebook Stands Heading Into 2013

    - by Mike Stiles
    In our last blog, we looked at how Twitter is positioned heading into 2013. Now it’s time to take a similar look at Facebook. 2012, for a time at least, seemed to be the era of Facebook-bashing. Between a far-from-smooth IPO, subsequent stock price declines, and anxiety over privacy, the top social network became a target for comedians, politicians, business journalists, and of course those who were prone to Facebook-bash even in the best of times. But amidst the “this is the end of Facebook” headlines, the company kept experimenting, kept testing, kept innovating, and pressing forward, committed as always to the user experience, while concurrently addressing monetization with greater urgency. Facebook enters 2013 with over 1 billion users around the world. Usage grew 41% in Brazil, Russia, Japan, South Korea and India in 2012. In the Middle East and North Africa, an average 21 new signups happen per minute. Engagement and time spent on the site would impress the harshest of critics. Facebook, while not bulletproof, has become such an integrated daily force in users’ lives, it’s getting hard to imagine any future mass rejection. You want to see a company recognizing weaknesses and shoring them up. Mobile was a weakness in 2012 as Facebook was one of many caught by surprise at the speed of user migration to mobile. But new mobile interfaces, better mobile ads, speed upgrades, standalone Messenger and Pages mobile apps, and the big dollar acquisition of Instagram, were a few indicators Facebook won’t play catch-up any more than it has to. As a user, the cool thing about Facebook is, it knows you. The uncool thing about Facebook is, it knows you. The company’s walking a delicate line between the public’s competing desires for customized experiences and privacy. While the company’s working to make privacy options clearer and easier, Facebook’s Paul Adams says data aggregation can move from acting on what a user is engaging with at the moment to a more holistic view of what they’re likely to want at any given time. To help learn about you, there’s Open Graph. Embedded through diverse partnerships, the idea is to surface what you’re doing and what you care about, and help you discover things via your friends’ activities. Facebook’s Director of Engineering, Mike Vernal, says building mobile social apps connected to Facebook in such ways is the next wave of big innovation. Expect to see that fostered in 2013. The Facebook site experience is always evolving. Some users like that about Facebook, others can’t wait to complain about it…on Facebook. The Facebook focal point, the News Feed, is not sacred and is seeing plenty of experimentation with the insertion of modules. From upcoming concerts, events, suggested Pages you might like, to aggregated “most shared” content from social reader apps, plenty could start popping up between those pictures of what your friends had for lunch.  As for which friends’ lunches you see, that’s a function of the mythic EdgeRank…which is also tinkered with. When Facebook changed it in September, Page admins saw reach go down and the high anxiety set in quickly. Engagement, however, held steady. The adjustment was about relevancy over reach. (And oh yeah, reach was something that could be charged for). Facebook wants users to see what they’re most likely to like, based on past usage and interactions. Adding to the “cream must rise to the top” philosophy, they’re now even trying out ordering post comments based on the engagement the comments get. Boy, it’s getting competitive out there for a social engager. Facebook has to make $$$. To do that, they must offer attractive vehicles to marketers. There are a myriad of ad units. But a key Facebook marketing concept is the Sponsored Story. It’s key because it encourages content that’s good, relevant, and performs well organically. If it is, marketing dollars can amplify it and extend its reach. Brands can expect the rollout of a search product and an ad network. That’s a big deal. It takes, as Open Graph does, the power of Facebook’s user data and carries it beyond the Facebook environment into the digital world at large. No one could target like Facebook can, and some analysts think it could double their roughly $5 billion revenue stream. As every potential revenue nook and cranny is explored, there are the users themselves. In addition to Gifts, Facebook thinks users might pay a few bucks to promote their own posts so more of their friends will see them. There’s also word classifieds could be purchased in News Feeds, though they won’t be called classifieds. And that’s where Facebook stands; a wildly popular destination, a part of our culture, with ever increasing functionalities, the biggest of big data, revenue strategies that appeal to marketers without souring the user experience, new challenges as a now public company, ongoing privacy concerns, and innovations that carry Facebook far beyond its own borders. Anyone care to write a “this is the end of Facebook” headline? @mikestilesPhoto via stock.schng

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  • Come see us at JavaU at JavaOne!

    - by tmcginn
    In just a little under a month, JavaOne will be in full swing (no pun intended) and thousands of Java developers will gather to hear the latest Java news, immerse themselves in Java technology and learn some new things. This year, I am fortunate enough to be able to attend, along with my Java curriculum development colleagues Matt Heimer and Mike Williams. We start our week at JavaOne teaching a one-day session at JavaU on Sunday morning. If you have never attended a training session through JavaU, you should check it out. There are some terrific sessions this year, and it might help to justify your trip to JavaOne if you can say it was for training! This year I am teaching a one day session on Java SE 7 New Features - a great session for anyone interested in the specific details of what is new in Java SE 7. Matt is teaching a one-day session on Developing Portable Java EE applications with the Enterprise JavaBeans 3.1 API and Java Persistence 2.0 API  EJB, and Mike is doing a one-day session on developing Rich Client applications with Java SE 7 using Java FX 2. I asked Matt and Mike to tell me what developers can expect from their sessions. Matt: "My session will get you up to speed on everything you need to know to create portable Java EE 6 applications using EJB 3.1 and JPA 2. I am going to cover why everyone can benefit from using EJBs (and why developers should relearn them if they haven't looked at them for years). Students who attend my session will see JPA examples showcasing how to use relational databases in an enterprise applications without programming to JDBC and without writing SQL statements. EJB and JPA benefit from being paired together, so I will also show how transaction management is easier in a container. I encourage students to bring a laptop and code as they learn!" Mike: "My session covers how to develop a rich client application using Java FX 2. Starting with the basic concepts of JavaFX, students will see how a JavaFX application is built from its layout, to its controls, to its data structures. In addition, more advanced controls like charts, smart tables, and transitions will be added to the application. Finally, a quick review of JavaFX concurrency and data binding is included. Blended with the core concepts the session will include some of the latest JavaFX technology. This includes using Scene Builder to create a JavaFX UI and connecting your XML UI definition to Java code.  In addition, packaging of the JavaFX application will be covered with some examples of the new native packaging features." As I mentioned, my session covers the changes in the Java for SE 7, including the  language changes that were voted into Java SE 7 from Project Coin. I will also look at how you can take advantage if the the new I/O library (NIO.2) for writing applications that work with files, directories and file systems. We will also look at the changes in Asynchronous I/O that are a part of the changes in NIO/2. We will spend some time looking at the changes to the Java Virtual Machine as well, including support for dynamically typed languages (JSR-292). We will spend some time looking at the Java Concurrency enhancements (JSR-166), including the new Fork/Join framework. And we'll round out the day with a look at changes in Swing, XML and a number of smaller changes in the API's. And, if these topics aren't grabbing your interest, take a look at the other 10 sessions that range from topics on architecture to how to pass the Oracle Certified Programmer I and II exams. See you soon!

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  • Barcodes and Bugs

    - by Tim Dexter
    A great mail from Mike at Browning last week. He has been through the ringer getting his BIP barcoding sorted out but he's now out of the woods. Here's the final result. By way of explanation, an excerpt from Mike's email:   This is an example of the GS1_128 carton shipping labels we are now producing with BIP in our web application for our vendors who drop ship products to our dealers. It produces 4 labels per printed page, in PDF format, on peel & stick label paper. Each label has a unique carton number, and a unique carton serial number in the SSCC-18 barcode. This example is for Cabelas (each customer has slightly different GS1-128 label format requirements – custom template for each - a pain!). I am using custom java encoders I wrote for the UPC and SSCC-18 barcodes, and a standard encoder (code128b) for the ShipTo zip barcode. Is there any way yet to get around that SUPER ANNOYING bug when opening the rtf template in MS Word, and it replaces my xsl code text in the barcode fields with gibberish??? Every time I open it I have to re-enter all the xsl code. Not only to be able to read & edit it, but also to get it to work in BIP (BIP doesn’t like the gibberish if I upload the template that has it). Mike's last point, regarding the annoying bug in the template builder, is one that I have experienced occasionally. The development team have looked at it and found it to be an issue with MSWord and not a plugin problem. That's all well and good but how can you get around it? Well, you can take advantage of the font mapping that BIP offers to get the barcodes into the PDF output. As many of you know, getting a barcode font to appear in the PDF output, you need employ the use of the xdo.cfg file in the template builder config directory.You would normally have an entry such as this:         <font family="Code 128" style="normal" weight="normal">        <truetype path="C:\windows\fonts\128R00.TTF" />       </font>to map a barcode font to get it to render in the PDF output when testing from the template builder plugin.   Mike's issue is only present when the formfield is highlighted with a barcode font. The other fields in the template are OK. What you can do to get around the issue is to bend the config entry to get around having to use the barcode font in the template at all. Changing the entry to something like:         <font family="Calibri" style="normal" weight="normal">        <truetype path="C:\windows\fonts\128R00.TTF" />       </font>   Note that we are mapping the Calibri; a humanly readable and non 'erroring' font in the template, to the code 128 barcode font. Where you used to highlight the field with the barcode in MSWord, you now use the Calibri font instead. At run time, BIP will go look for the Calibri font mapping and will drop in the Code128 font. Of course, Calibri is an example; you need to pick a font that you are not going to use any where else in the layout.

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  • Hard drive device names are different from one reboot to another in Ubuntu.

    - by Mike
    I have an Ubuntu machine (10.04 but had the same problem in 8.04) with a bunch of drives that I use as a file server. 1 SATA that I boot off of. 2 IDE that in RAID1 and 2 SATA in RAID1. The problem is the drives that I have in RAID1 change device names on reboot. This is a problem because the in my mdadm.conf a reference to /dev/sda1, for example, might not work the next time I reboot because /dev/sda1 could be a disk from another array. Any help getting around this would be appreciated. -Mike

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  • Hard drive device names are different from one reboot to another in Ubuntu.

    - by Mike
    I have an Ubuntu machine (10.04 but had the same problem in 8.04) with a bunch of drives that I use as a file server. 1 SATA that I boot off of. 2 IDE that in RAID1 and 2 SATA in RAID1. The problem is the drives that I have in RAID1 change device names on reboot. This is a problem because the in my mdadm.conf a reference to /dev/sda1, for example, might not work the next time I reboot because /dev/sda1 could be a disk from another array. Any help getting around this would be appreciated. -Mike

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  • How can I resize a partition managed by LVM?

    - by Mike C
    I have a fresh CentOS install on my machine and I would like to make space on the drive available in order to install Arch Linux. Unfortunately, LVM is new to me and doesn't appear to work well with gParted (on my Ubuntu 9.0 LiveCD, anyways). It always seems to treat the LVM as some unknown filesystem. I tried to use the 'lvm' utility on the LiveCD in order to resize the partition down, but I ended up somehow corrupting my filesystem (hence the fresh CentOS install). I haven't been able to find any documentation on LVM that makes much sense to me as a *nix n00b. Is there anywhere I can find some helpful documentation on LVM as well as a clear step by step on how to successfully resize a partition? Thanks, Mike

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  • Excel 2007: how to work out percentages of groups (top 10% of...)

    - by Mike
    I've recently read the following paragraph, and wondered: how you would organise the data (possibly Column A = country, Column B = salary, Column C = tax paid) but what formulas/calculations are used to work out these types of % figures: In country Y the top 0.5% of taxpayers pay 17% of total income tax. In country X the top 0.1% of taxpayers pay 8% of total income tax and in country Z, the top 1% pay about 40% of total federal income tax. I've gone through the help files and searched within Excel websites but I'm struggling to find an answer. %'s interest and trouble me... Any pointers or examples very welcome. Thanks Mike

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