aspnet - Page 13 - Developer IT

asp.net, wcf authentication and caching

- by andrew

I need to place my app business logic into a WCF service. The service shouldn't be dependent on ASP.NET and there is a lot of data regarding the authenticated user which is frequently used in the business logic hence it's supposed to be cached (probably using a distributed cache). As for authentication - I'm going to use two level authentication: Front-End - forms authentication back-end (WCF Service) - message username authentication. For both authentications the same custom membership provider is supposed to be used. To cache the authenticated user data, I'm going to implement two service methods: 1) Authenticate - will retrieve the needed data and place it into the cache(where username will be used as a key) 2) SignOut - will remove the data from the cache Question 1. Is correct to perform authentication that way (in two places) ? Question 2. Is this caching strategy worth using or should I look at using aspnet compatible service and asp.net session ? Maybe, these questions are too general. But, anyway I'd like to get any suggestions or recommendations. Any Idea

Read the article

A generic error has occurred in GDI+

- by sysigy

I know this has been asked a million times but I think I need to make it a million and one. I am getting "A generic error has occurred in GDI+" when trying to save a new bitmap. I have completely stripped down to the most basic lines of code and I still get the error with the following method: public class HomeController : Controller { public ActionResult Index() { return this.View(); } public void CreatePicture() { try { // THIS WORKS System.IO.File.Copy("C:\\copyTest.bmp", "C:\\test folder\\copyTest2.bmp"); // THIS WORKS System.IO.File.Delete("C:\\test folder\\deleteTest.bmp"); using (Bitmap newBitmap = new Bitmap(120, 120)) { // THIS FAILS newBitmap.Save("C:\\test folder\\test.bmp", ImageFormat.Bmp); } } catch (Exception ex) { throw ex; } } } The code is called from an html link on a blank page within an MVC 3.0 website using anonymous login. View: @Html.ActionLink("Create Picture", "CreatePicture", "Home", new { }) I have checked the folder permissions of "test folder" and have given full access to the following: ASPNET NETWORK SERVICE IUSR I still get the error... what have I missed / done wrong ?

Read the article

ASP menu is not showing

- by LauzPT

My web application menu isn't showing in any browser I use to test. I looked around and checked out if it wasn't the z-index bug mentioned here, that seems to have caused some trouble to many people. I'm wondering if I'm doing something wrong: <asp:Menu ID="Menu1" runat="server" DataSourceID="SiteMapDataSource1" Orientation="Horizontal" /> </asp:Menu> I've got this as my SiteMap: <?xml version="1.0" encoding="utf-8" ?> <siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" > <siteMapNode title="Pagina"> <siteMapNode url="Default.aspx" title="Home" description="Página Inicial" /> <siteMapNode url="Generos.aspx" title="Géneros" description="Géneros" /> <siteMapNode url="Artistas.aspx" title="Artistas" description="Artistas" /> <siteMapNode url="Musicas.aspx" title="Musicas" description="Músicas" /> <siteMapNode title="Admin" roles="Administrador"> <siteMapNode url="Admin/Musicas.aspx" title="Musicas"/> </siteMapNode> </siteMapNode> </siteMap> Any suggestions about what might be wrong? TIA

Read the article

Can I get away with this or is it just too crude and unpractical ?

- by The_AlienCoder

I spent the whole of last night searching for a free AspNet web chat control that I could simply drag into my website. Well the search was in vain as I could not find a control that matched my needs i.e List of users, 1 to 1 chat, Ability to kick out users.. In the end I decided to create my own control from scractch. Although it works well on my machine Im concerned that It maybe a little crude and unpractical on a shared hosting enviroment. Basically this is what I did : Created an sql database that stores the chat messages. Wrote the stored procedures and and included a statement that clears old messages Then the 'crude' part : Dragged an update panel and timer control on my page Dragged a Repeater databound to the chat messages table inside the update panel Dragged another update panel and inside it put a textbox and a button Configured the timer control to tick every 5 seconds. ..and then I made it all work like this In the timer tick event I 'refreshed' the messages display by invoking Databind() on my repeater i.e protected void Timer1_Tick(object sender, EventArgs e) { MyRepeater.DataBind(); } Then in my send button click event protected void btnSend_Click(object sender, EventArgs e) { MyDataLayer.InsertMessage(Message, Sender, CurrTime); } Well It works well on my machine and Ive got the other functionalities(users list, kick out user..) to work by simply creating more tables. But like I said it seems a little crude to me. so I need a proffesional opinion. Should I run with this or try another Approach ?

Read the article

Login failed for user ''. The user is not associated with a trusted SQL Server connection

- by Tony_Henrich

My web service app on my Windows XP box is trying to log in to my sql server 2005 database on the same box. The machine is part of a domain. I am logged in in the domain and I am an admin on my machine. I am using Windows Authentication in my connection string as in "Server=myServerAddress;Database=myDataBase;Trusted_Connection=True". SQLServer is configured for both types of authentication (mixed mode) and accepts remote connections and accepts tcp and named pipes protocols. Integrated authentication is enabled in IIS and with and without anonymous access. 'Everyone' has access to computer from network setting in local security settings. ASPNET is a user in the sql server and has access to the daatabase. user is mapped to the login. The app works fine for other developers which means the app shouldn't be changed (It's not new code). So it seems it's my machine which has an issue. I am getting the error "Login failed for user ''. The user is not associated with a trusted SQL Server connection" Note the blank user name. Why am I getting this error when both the app and database are on my machine? I can use SQL Server authentication but don't want to. I can connect to the database using SSMS and my Windows credentials. It might be related to setspn, kerberos, delegation, AD. I am not sure what further checks to make?

Read the article

problem after uploading file to web host

- by Alexander

I have a .xml file in my App_Data folder, I can access it fine in my localhost, however after uploading it to my webhost I got the following: ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via , the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user. To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access. So who should I grant access to read? There's 3 user in my web host and all seems to have read access set to them.. one is NETWORK_SERVICE, IUSR_MACHINENAME and my user. So what is wrong?

Read the article

IIS7 dynamic_compression_not_success Reason 12

- by Peter Oehlert

So, I'm a bit of an IIS7 n00b but I've used most of the old IIS systems going back to 3. I'm trying to turn on dynamic compression and it's working, mostly. It doesn't work for my ADO.Net Data Service (Astoria) requests, batched or not. I found the freb tracing which was really helpful. And what I come up with unbatched requests is that it returns Reason Code 12, NO_MATCHING_CONTENT_TYPE. OK, so I don't have the matching mime type specified, that's easy. Except this is what I have in my web.config (which I think is correct, but maybe not). <httpCompression dynamicCompressionDisableCpuUsage="100" dynamicCompressionEnableCpuUsage="100" noCompressionForHttp10="false" noCompressionForProxies="false" noCompressionForRange="false" sendCacheHeaders="true" staticCompressionDisableCpuUsage="100" staticCompressionEnableCpuUsage="100"> <dynamicTypes> <clear/> <add mimeType="*/*" enabled="true" /> </dynamicTypes> <staticTypes> <clear/> <add mimeType="*/*" enabled="true" /> </staticTypes> </httpCompression> <urlCompression doDynamicCompression="true" doStaticCompression="true" dynamicCompressionBeforeCache="false" /> Now I think that this means it should compress any request that includes the Accept:Gzip header. I'd love to know what others might think here. My fiddler trace: GET /SecurityDataService.svc/GetCurrentAccount HTTP/1.1 Accept-Charset: UTF-8 Accept-Language: en-us dataserviceversion: 1.0;Silverlight Accept: application/atom+xml,application/xml maxdataserviceversion: 1.0;Silverlight Referer: http://sdev03/apptestpage.aspx Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.21022; .NET CLR 3.5.30729; InfoPath.2; .NET CLR 3.0.30729; OfficeLiveConnector.1.4; OfficeLivePatch.1.3) Host: sdev03 Connection: Keep-Alive Cookie: .ASPXAUTH=<snip> HTTP/1.1 200 OK Cache-Control: no-cache Content-Type: application/atom+xml;charset=utf-8 Server: Microsoft-IIS/7.0 DataServiceVersion: 1.0; X-AspNet-Version: 2.0.50727 X-Powered-By: ASP.NET Date: Mon, 22 Mar 2010 22:29:06 GMT Content-Length: 2726 <?xml version="1.0" encoding="utf-8" standalone="yes"?> *** <snip> removed ***

Read the article

How to configure ASP.NET MVC 3 on IIS 6 (Windows 2003 R2)

- by Nedcode

I am getting 403 Directory Listing Denied for the root and 404 for an action that I know should exist. Background: I have build and deployed an ASP.NET MVC 2 applcation a long time ago. Later I upgraded it to MVC 3 and it is still working with not configuration changes. Setting it up on a windows 2003 R2 (Standard) initialy was a pain, but after a couple of days(yes, days) struggling it started working. Now I have to do the same with the same application on a different server (2003 R2 Standard again) on a different network. .Net 4 is installed and allowed ASP.NET MVC 3 is also installed By default IIS is set to use .net 4 I verify aspnet_isapi.dll used in application extension are from version 4.0.30319 .NET asemblies folder. I also added the wildcard mapping to aspnet_isapi.dll and unchecked verify file exists. Under Directory Security in Authentication Methods I have disabled anonymos access and enabled Integrated Windows authentication(same as the one on the server that it works) I have copied the same web.config with the <authentication mode="Windows" /> <authorization> <deny users="?" /> </authorization> I have set Read & Execute, List Folder Contents, and Read for the Networkservice account(under which the app pool is working). Also I have set the same for Network account, IIS_WPG, ASPNET and IUSR_MAchineName. I do not have an EnableExte??nsionlessUrls but even if I create it and set it to true or false it does not help. I also tried http://haacked.com/archive/2010/12/22/asp-net-mvc-3-extensionless-urls-on-iis-6.aspx and it did not help. But I kept getting 403 Directory Listing Denied for the root and 404 for an action that I know should exist. Web Platform installer was then used to re-install and possibly update .net, asp.net etc. I then noticed IIS was reset to default. So I added the wildcard mapping again. No, luck still 403. I exported configuration files from the working server setup and created new default app pool and new default website using those configurations. Still I get 403 Directory Listing Denied for the / and 404 for any action I try.

Read the article

Use ASP.NET 4 Browser Definitions with ASP.NET 3.5

- by Stephen Walther

We updated the browser definitions files included with ASP.NET 4 to include information on recent browsers and devices such as Google Chrome and the iPhone. You can use these browser definition files with earlier versions of ASP.NET such as ASP.NET 3.5. The updated browser definition files, and instructions for installing them, can be found here: http://aspnet.codeplex.com/releases/view/41420 The changes in the browser definition files can cause backwards compatibility issues when you upgrade an ASP.NET 3.5 web application to ASP.NET 4. If you encounter compatibility issues, you can install the old browser definition files in your ASP.NET 4 application. The old browser definition files are included in the download file referenced above. What’s New in the ASP.NET 4 Browser Definition Files The complete set of browsers supported by the new ASP.NET 4 browser definition files is represented by the following figure: If you look carefully at the figure, you’ll notice that we added browser definitions for several types of recent browsers such as Internet Explorer 8, Firefox 3.5, Google Chrome, Opera 10, and Safari 4. Furthermore, notice that we now include browser definitions for several of the most popular mobile devices: BlackBerry, IPhone, IPod, and Windows Mobile (IEMobile). The mobile devices appear in the figure with a purple background color. To improve performance, we removed a whole lot of outdated browser definitions for old cell phones and mobile devices. We also cleaned up the information contained in the browser files. Here are some of the browser features that you can detect: Are you a mobile device? <%=Request.Browser.IsMobileDevice %> Are you an IPhone? <%=Request.Browser.MobileDeviceModel == "IPhone" %> What version of JavaScript do you support? <%=Request.Browser["javascriptversion"] %> What layout engine do you use? <%=Request.Browser["layoutEngine"] %> Here’s what you would get if you displayed the value of these properties using Internet Explorer 8: Here’s what you get when you use Google Chrome: Testing Browser Settings When working with browser definition files, it is useful to have some way to test the capability information returned when you request a page with different browsers. You can use the following method to return the HttpBrowserCapabilities the corresponds to a particular user agent string and set of browser headers: public HttpBrowserCapabilities GetBrowserCapabilities(string userAgent, NameValueCollection headers) { HttpBrowserCapabilities browserCaps = new HttpBrowserCapabilities(); Hashtable hashtable = new Hashtable(180, StringComparer.OrdinalIgnoreCase); hashtable[string.Empty] = userAgent; // The actual method uses client target browserCaps.Capabilities = hashtable; var capsFactory = new System.Web.Configuration.BrowserCapabilitiesFactory(); capsFactory.ConfigureBrowserCapabilities(headers, browserCaps); capsFactory.ConfigureCustomCapabilities(headers, browserCaps); return browserCaps; } At the end of this blog entry, there is a link to download a simple Visual Studio 2008 project – named Browser Definition Test -- that uses this method to display capability information for arbitrary user agent strings. For example, if you enter the user agent string for an iPhone then you get the results in the following figure: The Browser Definition Test application enables you to submit a user-agent string and display a table of browser capabilities information. The browser definition files contain sample user-agent strings for each browser definition. I got the iPhone user-agent string from the comments in the iphone.browser file. Enumerating Browser Definitions Someone asked in the comments whether or not there is a way to enumerate all of the browser definitions. You can do this if you ware willing to use a little reflection and read a private property. The browser definition files in the config\browsers folder get parsed into a class named BrowserCapabilitesFactory. After you run the aspnet_regbrowsers tool, you can see the source for this class in the config\browser folder by opening a file named BrowserCapsFactory.cs. The BrowserCapabilitiesFactoryBase class has a protected property named BrowserElements that represents a Hashtable of all of the browser definitions. Here's how you can read this protected property and display the ID for all of the browser definitions: var propInfo = typeof(BrowserCapabilitiesFactory).GetProperty("BrowserElements", BindingFlags.NonPublic | BindingFlags.Instance); Hashtable browserDefinitions = (Hashtable)propInfo.GetValue(new BrowserCapabilitiesFactory(), null); foreach (var key in browserDefinitions.Keys) { Response.Write("" + key); } If you run this code using Visual Studio 2008 then you get the following results: You get a huge number of outdated browsers and devices. In all, 449 browser definitions are listed. If you run this code using Visual Studio 2010 then you get the following results: In the case of Visual Studio 2010, all the old browsers and devices have been removed and you get only 19 browser definitions. Conclusion The updated browser definition files included in ASP.NET 4 provide more accurate information for recent browsers and devices. If you would like to test the new browser definitions with different user-agent strings then I recommend that you download the Browser Definition Test project: Browser Definition Test Project

Read the article

Convert Excel File 'xls' to CSV, CAUTION: Bumps Ahead

- by faizanahmad

The task was to provide users with an interface where they can upload the 'csv' files, these files were to be processed and loaded to Database by a Console application. The code in Console application could not handle the 'xls' files so we thought, OK, lets convert 'xls' to 'csv' in the code, Seemed like fun. The idea was to convert it right after uploading within 'csv' file. As Microsoft does not recommend using the Excel objects in ASP.NET, we decided to use the Jet engine to open xls. (Ace driver is used for xlsx) The code was pretty straight, can be found on following links: http://www.c-sharpcorner.com/uploadfile/yuanwang200409/102242008174401pm/1.aspx http://www.devasp.net/net/articles/display/141.html FIRST BUMP 'OleDbException (0x80004005): Unspecified error' ( Impersonation ): The ablove code ran fine in my test web site and test console application, but it gave an 'OleDbException (0x80004005): Unspecified error' in main web site, turns out imperonation was set to True and as soon as I changed it to False, it did work. on My XP box, web site was running under user 'ASPNET' with imperosnation set to FALSE 'IUSR_*' i.e IIS guest user with impersonation set to TRUE The weired part was that both users had same rights on the folders I was saving files to and on Excel app in DCOM Config. We decided to give it a try on Windows Server 2003 with web site set to windows authentication ( impersonation = true ) and yes it did work. SECOND BUMP 'External table not in correct format': I got this error with some files and it appeared that the file from client has some metadata issues ( when I opened the file in Excel and try to save it ,excel would give me this error saying File can not be saved in current format ) and the error was caused by that. Some people were able to reslove the error by using "Extended Properties=HTML Import;" in connection string. But it did not work for me. We decided to detour from here and use Excel object :( as we had no control on client setting the meta deta of Excel files. Before third bump there were a ouple of small thingies like 'Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005' Fix can be found at http://blog.crowe.co.nz/archive/2006/03/02/589.aspx THIRD BUMP ( Could not get rid of the EXCEL process ): I has all the code in place to 'Quiet' the excel, but, it just did not work. work around was done to Kill the process as we knew no other application on server was using EXCEL. The normal steps to quite the excel application worked just fine in console application though. FOURTH BUMP: Code worked with one file 1 on my machine and with the other file 2 code will break. and the same code will work perfectly fine with file 2 on some other machine . We moved it to QA ( Windows Server 2003 )and worked with every file just perfect. But , then there was another problem: one user can upload it and second cant, permissions on folder and DCOM Conifg checked. Another Detour: Uplooad the xls as it is and convert in Console application. Lesson Learnt: If its 'xlsx' use 'ACE Driver' or read xml within excel as recommneded by MS. If xls and you know its always going to be properly formatted 'jet Engine' Code: Imports Microsoft.Office.Interop Private Function ConvertFile(ByVal SourceFolder As String, ByVal FileName As String, ByVal FileExtension As String)As Boolean Dim appExcel As New Excel.Application Dim workBooks As Excel.Workbooks = appExcel.Workbooks Dim objWorkbook As Excel.Workbook Try objWorkbook = workBooks.Open(CompleteFilePath ) objWorkbook.SaveAs(Filename:=CObj(SourceFolder & FileName & ".csv"), FileFormat:=Excel.XlFileFormat.xlCSV) Catch ex As Exception GenerateAlert(ex.Message().Replace("'", "") & " Error Converting File to CSV.") LogError(ex ) Return False Finally If Not(objWorkbook is Nothing) then objWorkbook.Close(SaveChanges:=CObj(False)) End If ReleaseObj(objWorkbook) ReleaseObj(workBooks) appExcel.Quit() ReleaseObj(appExcel) Dim proc As System.Diagnostics.Process For Each proc In System.Diagnostics.Process.GetProcessesByName("EXCEL") proc.Kill() Next DeleteSourceFile(SourceFolder & FileName & FileExtension) End Try Return True End Function Private Sub ReleaseObj(ByVal o As Object) Try System.Runtime.InteropServices.Marshal.ReleaseComObject(o) Catch ex As Exception LogError(ex ) Finally o = Nothing End Try End Sub Protected Sub DeleteSourceFile(Byval CompleteFilePath As string) Try Dim MyFile As FileInfo = New FileInfo(CompleteFilePath) If MyFile.Exists Then File.Delete(CompleteFilePath) Else Throw New FileNotFoundException() End If Catch ex As Exception GenerateAlert( " Source File could not be deleted.") LogError(ex) End Try End Sub The code to kill the process ( Avoid it if you can ): Dim proc As System.Diagnostics.Process For Each proc In System.Diagnostics.Process.GetProcessesByName("EXCEL") proc.Kill() Next

Read the article

JQuery + WCF + HTTP 404 Error

- by hangar18

HI All, I've searched high and low and finally decided to post a query here. I'm writing a very basic HTML page from which I'm trying to call a WCF service using jQuery and parse it using JSON. Service: IMyDemo.cs [ServiceContract] public interface IMyDemo { [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json)] Employee DoWork(); [OperationContract] [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json)] Employee GetEmp(int age, string name); } [DataContract] public class Employee { [DataMember] public int EmpId { get; set; } [DataMember] public string EmpName { get; set; } [DataMember] public int EmpSalary { get; set; } } MyDemo.svc.cs public Employee DoWork() { // Add your operation implementation here Employee obj = new Employee() { EmpSalary = 12, EmpName = "SomeName" }; return obj; } public Employee GetEmp(int age, string name) { Employee emp = new Employee(); if (age > 0) emp.EmpSalary = 12 + age; if (!string.IsNullOrEmpty(name)) emp.EmpName = "Server" + name; return emp; } WEb.Config <system.serviceModel> <services> <service behaviorConfiguration="EmployeesBehavior" name="MySample.MyDemo"> <endpoint address="" binding="webHttpBinding" contract="MySample.IMyDemo" behaviorConfiguration="EmployeesBehavior"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="EmployeesBehavior"> <serviceMetadata httpGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> <endpointBehaviors> <behavior name="EmployeesBehavior"> <webHttp/> </behavior> </endpointBehaviors> </behaviors> <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> </system.serviceModel> MyDemo.htm <head> <title></title> <script type="text/javascript" language="javascript" src="Scripts/jquery-1.4.1.js"></script> <script type="text/javascript" language="javascript" src="Scripts/json.js"></script> <script type="text/javascript"> //create a global javascript object for the AJAX defaults. debugger; var ajaxDefaults = {}; ajaxDefaults.base = { type: "POST", timeout : 1000, dataFilter: function (data) { //see http://encosia.com/2009/06/29/never-worry-about-asp-net-ajaxs-d-again/ data = JSON.parse(data); //use the JSON2 library if you aren’t using FF3+, IE8, Safari 3/Google Chrome return data.hasOwnProperty("d") ? data.d : data; }, error: function (xhr) { //see if (!xhr) return; if (xhr.responseText) { var response = JSON.parse(xhr.responseText); //console.log works in FF + Firebug only, replace this code if (response) alert(response); else alert("Unknown server error"); } } }; ajaxDefaults.json = $.extend(ajaxDefaults.base, { //see http://encosia.com/2008/03/27/using-jquery-to-consume-aspnet-json-web-services/ contentType: "application/json; charset=utf-8", dataType: "json" }); var ops = { baseUrl: "/MyService/MySample/MyDemo.svc/", doWork: function () { //see http://api.jquery.com/jQuery.extend/ var ajaxOptions = $.extend(ajaxDefaults.json, { url: ops.baseUrl + "DoWork", data: "{}", success: function (msg) { console.log("success"); console.log(typeof msg); if (typeof msg !== "undefined") { console.log(msg); } } }); $.ajax(ajaxOptions); return false; }, getEmp: function () { var ajaxOpts = $.extend(ajaxDefaults.json, { url: ops.baseUrl + "GetEmp", data: JSON.stringify({ age: 12, name: "NameName" }), success: function (msg) { $("span#lbl").html("age: " + msg.Age + "name:" + msg.Name); } }); $.ajax(ajaxOpts); return false; } } </script> </head> <body> <span id="lbl">abc</span> <br /><br /> <input type="button" value="GetEmployee" id="btnGetEmployee" onclick="javascript:ops.getEmp();" /> </body> I'm just not able to get this running. When I debug, I see the error being returned from the call is " Server Error in '/jQuerySample' Application. <h2> <i>HTTP Error 404 - Not Found.</i> </h2></span> " Looks like I'm missing something basic here. My sample is based on this I've been trying to fix the code for sometime now so I'd like you to take a look and see if you can figure out what is it that I'm doing wrong here. I'm able to see that the service is created when I browse the service in IE. I've also tried changing the setting as mentioned here Appreciate your help. I'm gonna blog about this as soon as the issue is resolved for the benefit of other devs Thanks -Soni

Read the article

How To Get Web Site Thumbnail Image In ASP.NET

- by SAMIR BHOGAYTA

Overview One very common requirement of many web applications is to display a thumbnail image of a web site. A typical example is to provide a link to a dynamic website displaying its current thumbnail image, or displaying images of websites with their links as a result of search (I love to see it on Google). Microsoft .NET Framework 2.0 makes it quite easier to do it in a ASP.NET application. Background In order to generate image of a web page, first we need to load the web page to get their html code, and then this html needs to be rendered in a web browser. After that, a screen shot can be taken easily. I think there is no easier way to do this. Before .NET framework 2.0 it was quite difficult to use a web browser in C# or VB.NET because we either have to use COM+ interoperability or third party controls which becomes headache later. WebBrowser control in .NET framework 2.0 In .NET framework 2.0 we have a new Windows Forms WebBrowser control which is a wrapper around old shwdoc.dll. All you really need to do is to drop a WebBrowser control from your Toolbox on your form in .NET framework 2.0. If you have not used WebBrowser control yet, it's quite easy to use and very consistent with other Windows Forms controls. Some important methods of WebBrowser control are. public bool GoBack(); public bool GoForward(); public void GoHome(); public void GoSearch(); public void Navigate(Uri url); public void DrawToBitmap(Bitmap bitmap, Rectangle targetBounds); These methods are self explanatory with their names like Navigate function which redirects browser to provided URL. It also has a number of useful overloads. The DrawToBitmap (inherited from Control) draws the current image of WebBrowser to the provided bitmap. Using WebBrowser control in ASP.NET 2.0 The Solution Let's start to implement the solution which we discussed above. First we will define a static method to get the web site thumbnail image. public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight) { WebsiteThumbnailImage thumbnailGenerator = new WebsiteThumbnailImage(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight); return thumbnailGenerator.GenerateWebSiteThumbnailImage(); } The WebsiteThumbnailImage class will have a public method named GenerateWebSiteThumbnailImage which will generate the website thumbnail image in a separate STA thread and wait for the thread to exit. In this case, I decided to Join method of Thread class to block the initial calling thread until the bitmap is actually available, and then return the generated web site thumbnail. public Bitmap GenerateWebSiteThumbnailImage() { Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage)); m_thread.SetApartmentState(ApartmentState.STA); m_thread.Start(); m_thread.Join(); return m_Bitmap; } The _GenerateWebSiteThumbnailImage will create a WebBrowser control object and navigate to the provided Url. We also register for the DocumentCompleted event of the web browser control to take screen shot of the web page. To pass the flow to the other controls we need to perform a method call to Application.DoEvents(); and wait for the completion of the navigation until the browser state changes to Complete in a loop. private void _GenerateWebSiteThumbnailImage() { WebBrowser m_WebBrowser = new WebBrowser(); m_WebBrowser.ScrollBarsEnabled = false; m_WebBrowser.Navigate(m_Url); m_WebBrowser.DocumentCompleted += new WebBrowserDocument CompletedEventHandler(WebBrowser_DocumentCompleted); while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents(); m_WebBrowser.Dispose(); } The DocumentCompleted event will be fired when the navigation is completed and the browser is ready for screen shot. We will get screen shot using DrawToBitmap method as described previously which will return the bitmap of the web browser. Then the thumbnail image is generated using GetThumbnailImage method of Bitmap class passing it the required thumbnail image width and height. private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { WebBrowser m_WebBrowser = (WebBrowser)sender; m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight); m_WebBrowser.ScrollBarsEnabled = false; m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height); m_WebBrowser.BringToFront(); m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds); m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero); } One more example here : http://www.codeproject.com/KB/aspnet/Website_URL_Screenshot.aspx

Read the article

Return Json causes save file dialog in asp.net mvc

- by Eran

Hi, I'm integrating jquery fullcalendar into my application. Here is the code i'm using: in index.aspx: <script type="text/javascript"> $(document).ready(function() { $('#calendar').fullCalendar({ events: "/Scheduler/CalendarData" }); }); </script> <div id="calendar"> </div> Here is the code for Scheduler/CalendarData: public ActionResult CalendarData() { IList<CalendarDTO> tasksList = new List<CalendarDTO>(); tasksList.Add(new CalendarDTO { id = 1, title = "Google search", start = ToUnixTimespan(DateTime.Now), end = ToUnixTimespan(DateTime.Now.AddHours(4)), url = "www.google.com" }); tasksList.Add(new CalendarDTO { id = 1, title = "Bing search", start = ToUnixTimespan(DateTime.Now.AddDays(1)), end = ToUnixTimespan(DateTime.Now.AddDays(1).AddHours(4)), url = "www.bing.com" }); return Json(tasksList,JsonRequestBehavior.AllowGet); } private long ToUnixTimespan(DateTime date) { TimeSpan tspan = date.ToUniversalTime().Subtract( new DateTime(1970, 1, 1, 0, 0, 0)); return (long)Math.Truncate(tspan.TotalSeconds); } public ActionResult Index() { return View("Index"); } I also have the following code inside head tag in site.master: <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server" /> <link href="<%= Url.Content("~/Content/jquery-ui-1.7.2.custom.css") %>" rel="stylesheet" type="text/css" /> <link href="~Perspectiva/Content/Site.css" rel="stylesheet" type="text/css" /> <link href="~Perspectiva/Content/fullcalendar.css" rel="stylesheet" type="text/css" /> <script src="~Perspectiva/Scripts/jquery-1.4.2.js" type="text/javascript"></script> <script src="~Perspectiva/Scripts/fullcalendar.js" type="text/javascript"></script> <script src="/Scripts/MicrosoftAjax.debug.js" type="text/javascript"></script> <script src="/Scripts/MicrosoftMvcAjax.debug.js" type="text/javascript"></script> Everything I did was pretty much copied from http://szahariev.blogspot.com/2009/08/jquery-fullcalendar-and-aspnet-mvc.html When navigating to /scheduler/calendardata I get a prompt for saving the json data which contents are exactly what I created in the CalendarData function. What do I need to do in order to render the page correctly? Thanks in advance, Eran

Read the article

ReportBuilder.application fails on my PC - but works on localhost

- by JayTee

We're running SQL 2005 on Win2K3 server and are using SSRS. Here's the situation: I can run Report Builder from localhost My coworker can run Report Builder on his Vista computer Another coworker can run Report Builder on his XP SP3 computer (IE7) I can NOT run Report Builder on my XP SP3 computer (IE7) I'm told that it could be anything from an errant registry entry to a group policy problem. Here is what I've tried: Put the site into "Trusted Sites" with "low" security re-install .NET create a new local user account and attempt to run it The results? Every single time, I get a dialog box: "Application cannot be started. Contact the application vendor" I click the details button and get this: PLATFORM VERSION INFO Windows : 5.1.2600.196608 (Win32NT) Common Language Runtime : 2.0.50727.3607 System.Deployment.dll : 2.0.50727.3053 (netfxsp.050727-3000) mscorwks.dll : 2.0.50727.3607 (GDR.050727-3600) dfdll.dll : 2.0.50727.3053 (netfxsp.050727-3000) dfshim.dll : 2.0.50727.3053 (netfxsp.050727-3000) SOURCES Deployment url : http://www.example.com/ReportServer/ReportBuilder/ReportBuilder.application Server : Microsoft-IIS/6.0 X-Powered-By : ASP.NET X-AspNet-Version: 2.0.50727 IDENTITIES Deployment Identity : ReportBuilder.application, Version=9.0.3042.0, Culture=neutral, PublicKeyToken=c3bce3770c238a49, processorArchitecture=msil APPLICATION SUMMARY * Online only application. * Trust url parameter is set. ERROR SUMMARY Below is a summary of the errors, details of these errors are listed later in the log. * Activation of http://www.example.com/ReportServer/ReportBuilder/ReportBuilder.application resulted in exception. Following failure messages were detected: + Value does not fall within the expected range. COMPONENT STORE TRANSACTION FAILURE SUMMARY No transaction error was detected. WARNINGS There were no warnings during this operation. OPERATION PROGRESS STATUS * [4/7/2010 2:53:57 PM] : Activation of http://www.example.com/ReportServer/ReportBuilder/ReportBuilder.application has started. * [4/7/2010 2:53:58 PM] : Processing of deployment manifest has successfully completed. ERROR DETAILS Following errors were detected during this operation. * [4/7/2010 2:53:58 PM] System.ArgumentException - Value does not fall within the expected range. - Source: System.Deployment - Stack trace: at System.Deployment.Application.NativeMethods.CorLaunchApplication(UInt32 hostType, String applicationFullName, Int32 manifestPathsCount, String[] manifestPaths, Int32 activationDataCount, String[] activationData, PROCESS_INFORMATION processInformation) at System.Deployment.Application.ComponentStore.ActivateApplication(DefinitionAppId appId, String activationParameter, Boolean useActivationParameter) at System.Deployment.Application.SubscriptionStore.ActivateApplication(DefinitionAppId appId, String activationParameter, Boolean useActivationParameter) at System.Deployment.Application.ApplicationActivator.Activate(DefinitionAppId appId, AssemblyManifest appManifest, String activationParameter, Boolean useActivationParameter) at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl) at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state) COMPONENT STORE TRANSACTION DETAILS * Transaction at [4/7/2010 2:53:58 PM] + System.Deployment.Internal.Isolation.StoreOperationSetDeploymentMetadata - Status: Set - HRESULT: 0x0 + System.Deployment.Internal.Isolation.StoreTransactionOperationType (27) - HRESULT: 0x0 I'm really at a loss. I'm certain there is something on my PC preventing the application from running - but I just don't know what. Google hasn't been much of a help because most problems are related to the server configuration (which I know is correct since it works on other PCs) Help me, Overflow Kenobi, you're my only hope..

Read the article

Validation firing in ASP.NET MVC

- by rkrauter

I am lost on this MVC project I am working on. I also read Brad Wilsons article. http://bradwilson.typepad.com/blog/2010/01/input-validation-vs-model-validation-in-aspnet-mvc.html I have this: public class Employee { [Required] public int ID { get; set; } [Required] public string FirstName { get; set; } [Required] public string LastName { get; set; } } and these in a controller: public ActionResult Edit(int id) { var emp = GetEmployee(); return View(emp); } [HttpPost] public ActionResult Edit(int id, Employee empBack) { var emp = GetEmployee(); if (TryUpdateModel(emp,new string[] { "LastName"})) { Response.Write("success"); } return View(emp); } public Employee GetEmployee() { return new Employee { FirstName = "Tom", LastName = "Jim", ID = 3 }; } and my view has the following: <% using (Html.BeginForm()) {%> <%= Html.ValidationSummary() %> <fieldset> <legend>Fields</legend> <div class="editor-label"> <%= Html.LabelFor(model => model.FirstName) %> </div> <div class="editor-field"> <%= Html.DisplayFor(model => model.FirstName) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.LastName) %> </div> <div class="editor-field"> <%= Html.TextBoxOrLabelFor(model => model.LastName, true)%> <%= Html.ValidationMessageFor(model => model.LastName) %> </div> <p> <input type="submit" value="Save" /> </p> </fieldset> <% } %> Note that the only field editable is the LastName. When I postback, I get back the original employee and try to update it with only the LastName property. But but I see on the page is the following error: •The FirstName field is required. This from what I understand, is because the TryUpdateModel failed. But why? I told it to update only the LastName property. I am using MVC2 RTM Thanks in advance.

Read the article

Jason/ajax web service call get redirected (302 Object moved) and then 500 unknow webservice name

- by user646499

I have been struggling with this for some times.. I searched around but didnt get a solution yet. This is only an issue on production server. In my development environment, everything works just fine. I am using JQuery/Ajax to update product information based on product's Color attribute. for example, a product has A and B color, the price for color A is different from color B. When user choose different color, the price information is updated as well. What I did is to first add a javascript function: function updateProductVariant() { var myval = jQuery("#<%=colorDropDownList.ClientID%").val(); jQuery.ajax({ type: "POST", url: "/Products.aspx/GetVariantInfoById", data: "{variantId:'" + myval + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (response) { var obj = jQuery.parseJSON(response.d); jQuery("#<%=lblStockAvailablity.ClientID%>").text(obj.StockMessage); jQuery(".price .productPrice").text(obj.CurrentPrice); jQuery(".price .oldProductPrice").text(obj.OldPrice); } }); } Then I can register the dropdown list's 'onclick' event point to function 'updateProductVariant' GetVariantInfoById is a WebGet method in the codebehind, its also very straightforward: [WebMethod] public static string GetVariantInfoById(string variantId) { int id = Convert.ToInt32(variantId); ProductVariant productVariant = IoC.Resolve().GetProductVariantById(id); string stockMessage = productVariant.FormatStockMessage(); StringBuilder oBuilder = new StringBuilder(); oBuilder.Append("{"); oBuilder.AppendFormat(@"""{0}"":""{1}"",", "StockMessage", stockMessage); oBuilder.AppendFormat(@"""{0}"":""{1}"",", "OldPrice", PriceHelper.FormatPrice(productVariant.OldPrice)); oBuilder.AppendFormat(@"""{0}"":""{1}""", "CurrentPrice", PriceHelper.FormatPrice(productVariant.Price)); oBuilder.Append("}"); return oBuilder.ToString(); } All these works fine on my local box, but if i upload to the production server, catching the traffic using fiddler, /Products.aspx/GetVariantInfoById becomes a Get call instead of a POST On my local box, HTTP/1.1 200 OK Server: ASP.NET Development Server/10.0.0.0 Date: Thu, 03 Mar 2011 09:00:08 GMT X-AspNet-Version: 4.0.30319 Cache-Control: private, max-age=0 Content-Type: application/json; charset=utf-8 Content-Length: 117 Connection: Close But when deployed on the host, it becomes HTTP/1.1 302 Found Proxy-Connection: Keep-Alive Connection: Keep-Alive Content-Length: 186 Via: 1.1 ADV-TMG-01 Date: Thu, 03 Mar 2011 08:59:12 GMT Location: http://www.pocomaru.com/Products.aspx/GetVariantInfoById/default.aspx Server: Microsoft-IIS/7.0 X-Powered-By: ASP.NET then of course, then it returns 500 error titleUnknown web method GetVariantInfoById/default.aspx.Parameter name: methodName Can someone please take a look? I think its some configuration in the production server which automatially redirects my webservice call to some other URL, but since the product server is out of my control, i am seeking a local fix for this. Thanks for the help!

Read the article

DoubleAnimation in ScaleTransform

- by Adam S

I'm trying, as an exhibition, to use a DoubleAnimation on the ScaleX and ScaleY properties of a ScaleTransform. I have a rectangle (144x144) which I want to make rectangular over five seconds. My XAML: <Window x:Class="ScaleTransformTest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300" Loaded="Window_Loaded"> <Grid> <Rectangle Name="rect1" Width="144" Height="144" Fill="Aqua"> <Rectangle.RenderTransform> <ScaleTransform ScaleX="1" ScaleY="1" /> </Rectangle.RenderTransform> </Rectangle> </Grid> </Window> My C#: private void Window_Loaded(object sender, RoutedEventArgs e) { ScaleTransform scaly = new ScaleTransform(1, 1); rect1.RenderTransform = scaly; Duration mytime = new Duration(TimeSpan.FromSeconds(5)); Storyboard sb = new Storyboard(); DoubleAnimation danim1 = new DoubleAnimation(1, 1.5, mytime); DoubleAnimation danim2 = new DoubleAnimation(1, 0.5, mytime); sb.Children.Add(danim1); sb.Children.Add(danim2); Storyboard.SetTarget(danim1, scaly); Storyboard.SetTargetProperty(danim1, new PropertyPath(ScaleTransform.ScaleXProperty)); Storyboard.SetTarget(danim2, scaly); Storyboard.SetTargetProperty(danim2, new PropertyPath(ScaleTransform.ScaleYProperty)); sb.Begin(); } Unfortunately, when I run this program, it does nothing. The rectangle stays at 144x144. If I do away with the animation, and just ScaleTransform scaly = new ScaleTransform(1.5, 0.5); rect1.RenderTransform = scaly; it will elongate it instantly, no problem. There is a problem elsewhere. Any suggestions? I have read the discussion at http://www.eggheadcafe.com/software/aspnet/29220878/how-to-animate-tofrom-an.aspx in which someone seems to have gotten a pure-XAML version working, but the code is not shown there. EDIT: At http://stackoverflow.com/questions/2131797/applying-animated-scaletransform-in-code-problem it seems someone had a very similar problem, I am fine with using his method that worked, but what the heck is that string thePath = "(0).(1)[0].(2)"; all about? What are those numbers representing?

Read the article

Parsing a .NET DataSet returned from a .NET Web Service in Java

- by Chris Dail

I have to consume a .NET hosted web service from a Java application. Interoperability between the two is usually very good. The problem I'm running into is that the .NET application developer chose to expose data using the .NET DataSet object. There are lots of articles written as to why you should not do this and how it makes interoperability difficult: http://www.hanselman.com/blog/ReturningDataSetsFromWebServicesIsTheSpawnOfSatanAndRepresentsAllThatIsTrulyEvilInTheWorld.aspx http://www.lhotka.net/weblog/ThoughtsOnPassingDataSetObjectsViaWebServices.aspx http://aspnet.4guysfromrolla.com/articles/051805-1.aspx http://www.theserverside.net/tt/articles/showarticle.tss?id=Top5WSMistakes My problem is that despite this not being recommended practice, I am stuck with having to consume a web service returning a DataSet with Java. When you generate a proxy for something like this with anything other than .NET you basically end up with an object that looks like this: @XmlElement(namespace = "http://www.w3.org/2001/XMLSchema", required = true) protected Schema schema; @XmlAnyElement(lax = true) protected Object any; This first field is the actual schema that should describe the DataSet. When I process this using JAX-WS and JAXB in Java, it bring all of XS-Schema in as Java objects to be represented here. Walking the object tree of JAXB is possible but not pretty. The any field represents the raw XML for the DataSet that is in the schema specified by the schema. The structure of the dataset is pretty consistent but the data types do change. I need access to the type information and the schema does vary from call to call. I've though of a few options but none seem like 'good' options. Trying to generate Java objects from the schema using JAXB at runtime seems to be a bad idea. This would be way too slow since it would need to happen everytime. Brute force walk the schema tree using the JAXB objects that JAX-WS brought in. Maybe instead of using JAXB to parse the schema it would be easier to deal with it as XML and use XPath to try and find the type information I need. Are there other options I have not considered? Is there a Java library to parse DataSet objects easily? What have other people done who may have similar situations?

Read the article

How to view ASMX SOAP using Fiddler2?

- by outer join

Does anyone know if Fiddler can display the raw SOAP messages for ASMX web services? I'm testing a simple web service using both Fiddler2 and Storm and the results vary (Fiddler shows plain xml while Storm shows the SOAP messages). See sample request/responses below: Fiddler2 Request: POST /webservice1.asmx/Test HTTP/1.1 Accept: */* Referer: http://localhost.:4164/webservice1.asmx?op=Test Accept-Language: en-us User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2; MS-RTC LM 8) Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Host: localhost.:4164 Content-Length: 0 Connection: Keep-Alive Pragma: no-cache Fiddler2 Response: HTTP/1.1 200 OK Server: ASP.NET Development Server/9.0.0.0 Date: Thu, 21 Jan 2010 14:21:50 GMT X-AspNet-Version: 2.0.50727 Cache-Control: private, max-age=0 Content-Type: text/xml; charset=utf-8 Content-Length: 96 Connection: Close <?xml version="1.0" encoding="utf-8"?> <string xmlns="http://tempuri.org/">Hello World</string> Storm Request (body only): <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <Test xmlns="http://tempuri.org/" /> </soap:Body> </soap:Envelope> Storm Response: Status Code: 200 Content Length : 339 Content Type: text/xml; charset=utf-8 Server: ASP.NET Development Server/9.0.0.0 Status Description: OK <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <TestResponse xmlns="http://tempuri.org/"> <TestResult>Hello World</TestResult> </TestResponse> </soap:Body> </soap:Envelope> Thanks for any help.

Read the article

Why does firefox round-trip to the server to determine whether my files are modifed?

- by erikkallen

I have some static content on my web site that I have set up caching for (using Asp.NET MVC). According to Firebug, the first time I open the page, Firefox sends this request: GET /CoreContent/Core.css?asm=0.7.3614.34951 Host: 127.0.0.1:3916 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 (.NET CLR 3.5.30729) Accept: text/css,*/*;q=0.1 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Referer: http://127.0.0.1:3916/Edit/1/101 Cookie: .ASPXAUTH=52312E5A802C1A079E2BA29AA2BFBC5A38058977B84452D62ED52855D4164659B4307661EC73A307BFFB2ED3871C67CB3A9AAFDB3A75A99AC0A21C63A6AADE9A11A7138C672E75125D9FF3EFFBD9BF62 Pragma: no-cache Cache-Control: no-cache Which my server replies to with this: Server: ASP.NET Development Server/9.0.0.0 Date: Mon, 23 Nov 2009 18:44:41 GMT X-AspNet-Version: 2.0.50727 X-AspNetMvc-Version: 1.0 Cache-Control: public, max-age=31535671 Expires: Tue, 23 Nov 2010 18:39:12 GMT Last-Modified: Mon, 23 Nov 2009 18:39:12 GMT Vary: * Content-Type: text/css Content-Length: 15006 Connection: Close So far, so good. However, if I refresh Firefox (not a cache-clearing refresh, just a normal one), during that refresh cycle Firefox will once again go to the server with this request: GET /CoreContent/Core.css?asm=0.7.3614.34951 Host: 127.0.0.1:3916 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5 (.NET CLR 3.5.30729) Accept: text/css,*/*;q=0.1 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Referer: http://127.0.0.1:3916/Edit/1/101 Cookie: .ASPXAUTH=52312E5A802C1A079E2BA29AA2BFBC5A38058977B84452D62ED52855D4164659B4307661EC73A307BFFB2ED3871C67CB3A9AAFDB3A75A99AC0A21C63A6AADE9A11A7138C672E75125D9FF3EFFBD9BF62 If-Modified-Since: Mon, 23 Nov 2009 18:39:20 GMT Cache-Control: max-age=0 to which my server responds 304 Not Modified. Why does Firefox issue this second request? In the first response, I said that the cache does not expire for a year (I intend to use query parameters whenever things change). Do I have to add another response header to prevent this extra roundtrip? Edit: It does not matter whether I press refresh, or whether I go to the page again (or a different URL, which references the same external files). Firefox does the same again. Also, I don't claim this to be a bug in FF, I just wonder if there is another header I can set which means "This document will never change, don't bother me again".

Read the article

Why do we get a sudden spike in response times?

- by Christian Hagelid

We have an API that is implemented using ServiceStack which is hosted in IIS. While performing load testing of the API we discovered that the response times are good but that they deteriorate rapidly as soon as we hit about 3,500 concurrent users per server. We have two servers and when hitting them with 7,000 users the average response times sit below 500ms for all endpoints. The boxes are behind a load balancer so we get 3,500 concurrents per server. However as soon as we increase the number of total concurrent users we see a significant increase in response times. Increasing the concurrent users to 5,000 per server gives us an average response time per endpoint of around 7 seconds. The memory and CPU on the servers are quite low, both while the response times are good and when after they deteriorate. At peak with 10,000 concurrent users the CPU averages just below 50% and the RAM sits around 3-4 GB out of 16. This leaves us thinking that we are hitting some kind of limit somewhere. The below screenshot shows some key counters in perfmon during a load test with a total of 10,000 concurrent users. The highlighted counter is requests/second. To the right of the screenshot you can see the requests per second graph becoming really erratic. This is the main indicator for slow response times. As soon as we see this pattern we notice slow response times in the load test. How do we go about troubleshooting this performance issue? We are trying to identify if this is a coding issue or a configuration issue. Are there any settings in web.config or IIS that could explain this behaviour? The application pool is running .NET v4.0 and the IIS version is 7.5. The only change we have made from the default settings is to update the application pool Queue Length value from 1,000 to 5,000. We have also added the following config settings to the Aspnet.config file: <system.web> <applicationPool maxConcurrentRequestsPerCPU="5000" maxConcurrentThreadsPerCPU="0" requestQueueLimit="5000" /> </system.web> More details: The purpose of the API is to combine data from various external sources and return as JSON. It is currently using an InMemory cache implementation to cache individual external calls at the data layer. The first request to a resource will fetch all data required and any subsequent requests for the same resource will get results from the cache. We have a 'cache runner' that is implemented as a background process that updates the information in the cache at certain set intervals. We have added locking around the code that fetches data from the external resources. We have also implemented the services to fetch the data from the external sources in an asynchronous fashion so that the endpoint should only be as slow as the slowest external call (unless we have data in the cache of course). This is done using the System.Threading.Tasks.Task class. Could we be hitting a limitation in terms of number of threads available to the process?

Read the article

SQL Server Log File Won't Shrink due cause "log are pending replication" on non replicated DB?

- by user796466

I have a non Mission Critial DB 9am-5pm SQL Server database that I have set up to do nightly full backups and log backups every 30 minutes during business hours. The database is in full recovery and normally I have no reason to truncate/shrink logs unless I do some heavy maintenance. Log backups manage the size with no issue. However I have not been at this client for several weeks and upon inspection I noticed that the log had grown to about 10 times the size of the .mdf file. I poked around backups had been running and I had not gotten any severity error alerts (SQL mail). I attempted to put DB in simple recovery and shrink the log, this was no good. I precede to try a log backup and I got: The log was not truncated because records at the beginning of the log are pending replication or Change Data Capture. Ensure the Log Reader Agent or capture job is running or use sp_repldone to mark transactions as distributed or captured. Restart SQL Server rinse repeat same thing ... I said ??? Replication is not nor ever has been set up on this DB or database /server ??? So the log backups have not been flushing the .ldf. So I did a couple hours of research and I found: http://www.sqlmonster.com/Uwe/Forum.aspx/sql-server/5445/Log-file-is-not-truncated-inspite-of-regular-log-backup http://www.eggheadcafe.com/software/aspnet/30708322/the-log-was-not-truncated-because-records-at-the-beginning-of-the-log-are-pending-replication.aspx seems to be some kind of poorly documented bug ?? The solution seems to have been to run exec sp_repldone, more precisley EXEC sp_repldone @xactid = NULL, @xact_segno = NULL, @numtrans = 0, @time= 0, @reset = 1 This procedure can be used in emergency situations to allow truncation of the transaction log when transactions pending replication are present. Using this procedure prevents Microsoft SQL Server 2000 from replicating the database until the database is unpublished and republished. ~ MSDN When I do that I get the following Msg 18757, Level 16, State 1, Procedure sp_repldone, Line 1 Unable to execute procedure. The database is not published. Execute the procedure in a database that is published for replication. Which makes sense Because the DB has never been published for replication. I have several questions: A) First and foremost is, WTF is going on ? What is causeing this, I am interested in knowing the why here ? Is this genuinley a bug or is there some aspect of the backup that is not functioning properly that cause's the DB to mimick a replicated state ? Someone please edify me on this. B) Second ... Do I really have to publish / replicate this DB to exec this SP to fix this ??? Sounds crazy or is there some T-SQL that I can put it in a published state exec the proc and be on my way ... C) Third, if I do indeed have to publish this database to exec the SP to release this unneeded mis replicated/intended log , to get my .ldf file and backup back on track. How do I publish the database without an online host that it is asking for ??? I don't generally do this kind of database administration and need some guidance. Sorry if this is too verbose but just voicing the question helps me clarify it ... Thank you in advance for your help

Read the article

Getting Started with ASP.NET Membership, Profile and RoleManager

- by Ben Griswold

A new ASP.NET MVC project includes preconfigured Membership, Profile and RoleManager providers right out of the box. Try it yourself – create a ASP.NET MVC application, crack open the web.config file and have a look. First, you’ll find the ApplicationServices database connection: <connectionStrings> <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/> </connectionStrings> Notice the connection string is referencing the aspnetdb.mdf database hosted by SQL Express and it’s using integrated security so it’ll just work for you without having to call out a specific database login or anything. Scroll down the file a bit and you’ll find each of the three noted sections: <membership> <providers> <clear/> <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" applicationName="/" /> </providers> </membership> <profile> <providers> <clear/> <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="ApplicationServices" applicationName="/" /> </providers> </profile> <roleManager enabled="false"> <providers> <clear /> <add connectionStringName="ApplicationServices" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> <add applicationName="/" name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </providers> </roleManager> Really. It’s all there. Still don’t believe me. Run the application, walk through the registration process and finally login and logout. Completely functional – and you didn’t have to do a thing! What else? Well, you can manage your users via the Configuration Manager which is hiding in Visual Studio behind Projects > ASP.NET Configuration. The ASP.NET Web Site Administration Tool isn’t MVC-specific (neither is the Membership, Profile or RoleManager stuff) but it’s neat and I hardly ever see anyone using it. Here you can set up and edit users, roles, and set access permissions for your site. You can manage application settings, establish your SMTP settings, configure debugging and tracing, define default error page and even take your application offline. The UI is rather plain-Jane but it works great. And here’s the best of all. Let’s say you, like most of us, don’t want to run your application on top of the aspnetdb.mdf database. Let’s suppose you want to use your own database and you’d like to add the membership stuff to it. Well, that’s easy enough. Take a look inside your [drive:]\%windir%\Microsoft.Net\Framework\v2.0.50727\ folder. Here you’ll find a bunch of files. If you were to run the InstallCommon.sql, InstallMembership.sql, InstallRoles.sql and InstallProfile.sql files against the database of your choices, you’d be installing the same membership, profile and role artifacts which are found in the aspnet.db to your own database. Too much trouble? Okay. Run [drive:]\%windir%\Microsoft.Net\Framework\v2.0.50727\aspnet_regsql.exe from the command line instead. This will launch the ASP.NET SQL Server Setup Wizard which walks you through the installation of those same database objects into the new or existing database of your choice. You may not always have the luxury of using this tool on your destination server, but you should use it whenever you can. Last tip: don’t forget to update the ApplicationServices connectionstring to point to your custom database after the setup is complete. At the risk of sounding like a smarty, everything I’ve mentioned in this post has been around for quite a while. The thing is that not everyone has had the opportunity to use it. And it makes sense. I know I’ve worked on projects which used custom membership services. Why bother with the out-of-the-box stuff, right? And the .NET framework is so massive, who can know it all. Well, eventually you might have a chance to architect your own solution using any implementation you’d like or you will have the time to play around with another aspect of the framework. When you do, think back to this post.

Read the article

MVC Razor Engine For Beginners Part 1

- by Humprey Cogay, C|EH, E|CSA

I. What is MVC? a. http://www.asp.net/mvc/tutorials/older-versions/overview/asp-net-mvc-overview II. Software Requirements for this tutorial a. Visual Studio 2010/2012. You can get your free copy here Microsoft Visual Studio 2012 b. MVC Framework Option 1 - Install using a standalone installer http://www.microsoft.com/en-us/download/details.aspx?id=30683 Option 2 - Install using Web Platform Installer http://www.microsoft.com/web/handlers/webpi.ashx?command=getinstallerredirect&appid=MVC4VS2010_Loc III. Creating your first MVC4 Application a. On the Visual Studio click file new solution link b. Click Other Project Type>Visual Studio Solutions and on the templates window select blank solution and let us name our solution MVCPrimer. c. Now Click File>New and select Project d. Select Visual C#>Web> and select ASP.NET MVC 4 Web Application and Enter MyWebSite as Name e. Select Empty, Razor as view engine and uncheck Create a Unit test project f. You can now view a basic MVC 4 Application Structure on your solution explorer g. Now we will add our first controller by right clicking on the controllers folder on your solution explorer and select Add>Controller h. Change the name of the controller to HomeController and under the scaffolding options select Empty MVC Controller. i. You will now see a basic controller with an Index method that returns an ActionResult j. We will now add a new View Folder for our Home Controller. Right click on the views folder on your solution explorer and select Add> New Folder> and name this folder Home k. Add a new View by right clicking on Views>Home Folder and select Add View. l. Name the view Index, and select Razor(CSHTML) as View Engine, All checkbox should be unchecked for now and click add. m. Relationship between our HomeController and Home Views Sub Folder n. Add new HTML Contents to our newly created Index View o. Press F5 to run our MVC Application p. We will create our new model, Right click on the models folder of our solution explorer and select Add> Class. q. Let us name our class Customer r. Edit the Customer class with the following code s. Open the HomeController by double clickin HomeController of our Controllers folder and edit the HomeControllerusing System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; namespace MyWebSite.Controllers { public class HomeController : Controller { // // GET: /Home/ public ActionResult Index() { return View(); } public ActionResult ListCustomers() { List<Models.Customer> customers = new List<Models.Customer>(); //Add First Customer to Our Collection customers.Add(new Models.Customer() { Id = 1, CompanyName = "Volvo", ContactNo = "123-0123-0001", ContactPerson = "Gustav Larson", Description = "Volvo Car Corporation, or Volvo Personvagnar AB, is a Scandinavian automobile manufacturer founded in 1927" }); //Add Second Customer to Our Collection customers.Add(new Models.Customer() { Id = 2, CompanyName = "BMW", ContactNo = "999-9876-9898", ContactPerson = "Franz Josef Popp", Description = "Bayerische Motoren Werke AG, (BMW; English: Bavarian Motor Works) is a " + "German automobile, motorcycle and engine manufacturing company founded in 1917. " }); //Add Third Customer to Our Collection customers.Add(new Models.Customer() { Id = 3, CompanyName = "Audi", ContactNo = "983-2222-1212", ContactPerson = "Karl Benz", Description = " is a multinational division of the German manufacturer Daimler AG," }); return View(customers); } } } t. Let us now create a view for this Class, But before continuing Press Ctrl + Shift + B to rebuild the solution, this will make the previously created model on the Model class drop down of the Add View Menu. Right click on the views>Home folder and select Add>View u. Let us name our View as ListCustomers, Select Razor(CSHTML) as View Engine, Put a check mark on Create a strongly-typed view, and select Customer (MyWebSite.Models) as model class. Slect List on the Scaffold Template and Click OK. v. Run the MVC Application by pressing F5, and on the address bar insert Home/ListCustomers, We should now see a web page similar below. x. You can edit ListCustomers.CSHTML to remove and add HTML codes @model IEnumerable<MyWebSite.Models.Customer> @{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title>ListCustomers</title> </head> <body> <h2>List of Customers</h2> <table border="1"> <tr> <th> @Html.DisplayNameFor(model => model.CompanyName) </th> <th> @Html.DisplayNameFor(model => model.Description) </th> <th> @Html.DisplayNameFor(model => model.ContactPerson) </th> <th> @Html.DisplayNameFor(model => model.ContactNo) </th> </tr> @foreach (var item in Model) { <tr> <td> @Html.DisplayFor(modelItem => item.CompanyName) </td> <td> @Html.DisplayFor(modelItem => item.Description) </td> <td> @Html.DisplayFor(modelItem => item.ContactPerson) </td> <td> @Html.DisplayFor(modelItem => item.ContactNo) </td> </tr> } </table> </body> </html> y. Press F5 to run the MVC Application z. You will notice some @HTML.DisplayFor codes. These are called HTML Helpers you can read more about HTML Helpers on this site http://www.w3schools.com/aspnet/mvc_htmlhelpers.asp That’s all. You now have your first MVC4 Razor Engine Web Application . . .

Read the article

COMException when trying to use a Library

- by sarkie

Hi Guys, I have an ASP.net WebService which uses a Library, this has a dependency on some third party .dlls. If I add a reference to the Library to my webservice, I get a COMException and I can't load the site. I thought it may be to do with aspnet user credentials, so I have tried impersonating and using processModel in machine.config but nothing seems to work. The .dlls are for communicating with hardware so I am not even using them on the server just other parts of the library, is there any way I can fix this? I'm running on Windows XP Pro SP3 with Visual 2008 SP1 and .net 3.5. I am thinking the only way of fixing it, is to split up the library into hardware and non-hardware based. Cheers, Sarkie The specified procedure could not be found. (Exception from HRESULT: 0x8007007F) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: The specified procedure could not be found. (Exception from HRESULT: 0x8007007F) Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [COMException (0x8007007f): The specified procedure could not be found. (Exception from HRESULT: 0x8007007F)] [FileLoadException: A procedure imported by 'OBIDISC4NETnative, Version=0.0.0.0, Culture=neutral, PublicKeyToken=900ed37a7058e4f2' could not be loaded.] System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0 System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +43 System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +127 System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +142 System.Reflection.Assembly.Load(String assemblyString) +28 System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46 [ConfigurationErrorsException: A procedure imported by 'OBIDISC4NETnative, Version=0.0.0.0, Culture=neutral, PublicKeyToken=900ed37a7058e4f2' could not be loaded.] System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +613 System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +203 System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +105 System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178 System.Web.Compilation.WebDirectoryBatchCompiler..ctor(VirtualDirectory vdir) +163 System.Web.Compilation.BuildManager.BatchCompileWebDirectoryInternal(VirtualDirectory vdir, Boolean ignoreErrors) +53 System.Web.Compilation.BuildManager.BatchCompileWebDirectory(VirtualDirectory vdir, VirtualPath virtualDir, Boolean ignoreErrors) +175 System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) +83 System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +261 System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +101 System.Web.Compilation.BuildManager.GetVPathBuildResult(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) +83 System.Web.Compilation.BuildManager.GetVPathBuildResult(HttpContext context, VirtualPath virtualPath) +10 System.Web.UI.WebServiceParser.GetCompiledType(String inputFile, HttpContext context) +43 System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb, String url, String filePath) +180 System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType, String url, String pathTranslated) +102 System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +193 System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155 -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

Search Results

Search found 361 results on 15 pages for 'aspnet'.

Page 13/15 | < Previous Page | 9 10 11 12 13 14 15 | Next Page >

- by andrew

- by sysigy

- by LauzPT

- by The_AlienCoder

- by Tony_Henrich

- by Alexander

- by Peter Oehlert

- by Nedcode

- by Stephen Walther

- by faizanahmad

- by hangar18

- by SAMIR BHOGAYTA

- by Eran

- by JayTee

- by rkrauter

- by user646499

- by Adam S

- by Chris Dail

- by outer join

- by erikkallen

- by Christian Hagelid

- by user796466

- by Ben Griswold

- by Humprey Cogay, C|EH, E|CSA

- by sarkie

< Previous Page | 9 10 11 12 13 14 15 | Next Page >