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  • Strange WPF Behaviour With WCF Async calls

    - by gvigsgb
    I have a WPF application calling WCF via Async calls. The application has four tabs in which each are loaded from seperate async calls, each tab has a busy indicator. The problem: When running within Visual Studio I can click a refresh button on each tab and each tab's busy indicator starts and the data is retrieved from the WCF service. As each tab's data comes back it is refreshed. When I deploy the application via one click the application's UI hangs after only two tabs start refreshing. So in this case I press refresh on tab one, then on tab two and the application hangs until one of the two tabs data comes back. I thought at first that it was something to do with the WCF service throtteling and that was not the case as both the Visual Studio and the One Click deployments of the application point to the same service. Anyone have any ideas on where to look? I cannot reproduce the hang issue within Visual Studio?

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  • Haskell function composition (.) and function application ($) idioms: correct use.

    - by Robert Massaioli
    I have been reading Real World Haskell and I am nearing the end but a matter of style has been niggling at me to do with the (.) and ($) operators. When you write a function that is a composition of other functions you write it like: f = g . h But when you apply something to the end of those functions I write it like this: k = a $ b $ c $ value But the book would write it like this: k = a . b . c $ value Now to me they look functionally equivalent, they do the exact same thing in my eyes. However, the more I look, the more I see people writing their functions in the manner that the book does: compose with (.) first and then only at the end use ($) to append a value to evaluate the lot (nobody does it with many dollar compositions). Is there a reason for using the books way that is much better than using all ($) symbols? Or is there some best practice here that I am not getting? Or is it superfluous and I shouldn't be worrying about it at all? Thanks.

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  • How to make command-line options mandatory with GLib?

    - by ahe
    I use GLib to parse some command-line options. The problem is that I want to make two of those options mandatory so that the program terminates with the help screen if the user omits them. My code looks like this: static gint line = -1; static gint column = -1; static GOptionEntry options[] = { {"line", 'l', 0, G_OPTION_ARG_INT, &line, "The line", "L"}, {"column", 'c', 0, G_OPTION_ARG_INT, &column, "The column", "C"}, {NULL} }; ... int main(int argc, char** argv) { GError *error = NULL; GOptionContext *context; context = g_option_context_new ("- test"); g_option_context_add_main_entries (context, options, NULL); if (!g_option_context_parse(context, &argc, &argv, &error)) { usage(error->message, context); } ... return 0; } If I omit one of those parameters or both on the command-line g_option_context_parse() still succeeds and the values in question (line and or column) are still -1. How can I tell GLib to fail parsing if the user doesn't pass both options on the command-line? Maybe I'm just blind but I couldn't find a flag I can put into my GOptionEntry data structure to tell it to make those fields mandatory. Of course I could check if one of those variables is still -1 but then the user could just have passed this value on the command-line and I want to print a separate error message if the values are out of range.

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  • Need Help with .NET OpenId HttpHandler

    - by Mark E
    I'm trying to use a single HTTPHandler to authenticate a user's open id and receive a claimresponse. The initial authentication works, but the claimresponse does not. The error I receive is "This webpage has a redirect loop." What am I doing wrong? public class OpenIdLogin : IHttpHandler { private HttpContext _context = null; public void ProcessRequest(HttpContext context) { _context = context; var openid = new OpenIdRelyingParty(); var response = openid.GetResponse(); if (response == null) { // Stage 2: user submitting Identifier openid.CreateRequest(context.Request.Form["openid_identifier"]).RedirectToProvider(); } else { // Stage 3: OpenID Provider sending assertion response switch (response.Status) { case AuthenticationStatus.Authenticated: //FormsAuthentication.RedirectFromLoginPage(response.ClaimedIdentifier, false); string identifier = response.ClaimedIdentifier; //****** TODO only proceed if we don't have the user's extended info in the database ************** ClaimsResponse claim = response.GetExtension<ClaimsResponse>(); if (claim == null) { //IAuthenticationRequest req = openid.CreateRequest(identifier); IAuthenticationRequest req = openid.CreateRequest(Identifier.Parse(identifier)); var fields = new ClaimsRequest(); fields.Email = DemandLevel.Request; req.AddExtension(fields); req.RedirectingResponse.Send(); //Is this correct? } else { context.Response.ContentType = "text/plain"; context.Response.Write(claim.Email); //claim.FullName; } break; case AuthenticationStatus.Canceled: //TODO break; case AuthenticationStatus.Failed: //TODO break; } } }

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  • How to exclude the title from theme applied to the application?

    - by Janusz
    I'm using a theme for my app to set some common layout features. One of the things I change in this theme is the text style. I change the color of text in the whole app to a certain color etc. Sadly the color of the title is also changed and the result is a somewhat blurry ugly style. Is it possible to somehow overwrite the style for the title in the theme? Or exclude the title?

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  • Eager loading in EF1.0

    - by Dave Swersky
    I have a many-to-many relationship: Application - Applications_Servers - Server This is set up in my Entity Data Model and all is well. My problem is that I'd like to eager-load the whole graph of Applications so that I have an IEnumerable<Applications>, each Application member populated with the Servers collection associated by the many-to-many relationship. Normally this wouldn't be a problem, but according to my research there must be a navigation property between Application and Server. This is not the case for me because my Applications_Servers join table has more in it than just the two keys. Therefore, there is no navigation property directly between Application and Server, and this doesn't work: var apps = (from a in context.Application.Include("Server") select a).ToList(); I get an error saying there is no navigation property on Application called "Server", and that's correct, there is none. How do I write the query to eager-load my Applications with their Servers in this case?

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  • Attempting to load a 64-bit application, how this CPU is not compatible with 64-bit mode

    - by Brandon Michael Hunter
    I have a Dell Studio 540, 64 bit OS Windows Home Premium. My CPU is supports Intel's virtualization technology, but I don't know how to enabled it on my machine. I saw that you can do it via the bios, but I didn't see this option when going through my BIOS. Is there another way to enabled this feature? Please let me know. I'm trying to installed Windows Server 2008 via Vircutal PC 2007. Thank You,

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  • Unexpected cross threading issue

    - by haughtonomous
    I'm trying to do something very simple in principal, but I keep getting a cross-threading exception which has me stumped because I'm not setting out to use multiple threads. I have a Windows Forms application. It launches another Windows Forms application (using the System.Diagnostics.Process class) , and catches the Exited event when that application is closed. My application event handler then tries to copy text from the clipboard to a control on the current displayed form. At this point a Cross-threading exception is thrown. I assume that the problem is that the event from the closing application is in another thread (I'm outside my comfort zone here, so bear with me), so the question boils down to "How do I prevent this exception?" I'm somewhat constrained into having to copy from the clipboard, but I could launch the other application a different way if that would solve the problem.

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  • How to manage lifecycle in a ViewGroup-derived class?

    - by Scott Smith
    I had a bunch of code in an activity that displays a running graph of some external data. As the activity code was getting kind of cluttered, I decided to extract this code and create a GraphView class: public class GraphView extends LinearLayout { public GraphView(Context context, AttributeSet attrs) { super(context, attrs); LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.graph_view, this, true); } public void start() { // Perform initialization (bindings, timers, etc) here } public void stop() { // Unbind, destroy timers, yadda yadda } . . . } Moving stuff into this new LinearLayout-derived class was simple. But there was some lifecycle management code associated with creating and destroying timers and event listeners used by this graph (I didn't want this thing polling in the background if the activity was paused, for example). Coming from a MS Windows background, I kind of expected to find overridable onCreate() and onDestroy() methods or something similar, but I haven't found anything of the sort in LinearLayout (or any of its inherited members). Having to leave all of this initialization code in the Activity, and then having to pass it into the view seemed like it defeated the original purpose of encapsulating all of this code into a reusable view. I ended up adding two additional public methods to my view: start() and stop(). I make these calls from the activity's onResume() and onPause() methods respectively. This seems to work, but it feels like I'm using duct tape here. Does anyone know how this is typically done? I feel like I'm missing something...

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  • If my application doesn't use a lot of memory, can I ignore viewDidUnload:?

    - by iPhoneToucher
    My iPhone app generally uses under 5MB of living memory and even in the most extreme conditions stays under 8MB. The iPhone 2G has 128MB of RAM and from what I've read an app should only expect to have 20-30MB to use. Given that I never expect to get anywhere near the memory limit, do I need to care about memory warnings and setting objects to nil in viewDidUnload:? The only way I see my app getting memory warnings is if something else on the phone is screwing with the memory, in which case the entire phone would be acting silly. I built my app without ever using viewDidUnload:, so there's more than a hundred classes that I'd need to inspect and add code to if I did need to implement it.

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  • A peculiar problem

    - by rajivpradeep
    I have an application on a pen drive, which executes some flash files on the same USB flash drive. when i run the application with in the drive, the application just keeps running in the back ground without running the flash files. When i copy the application on desktop, it runs the flash files in the USB. Also i programmed the app to write log file, when i run the application with in USB, the app is running but the log file is not getting written, when i remove the pen drive, the file gets written. What might be the problem, I am using VC++ , VS 2008 to build the application.

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  • vnc application for iPhone. How to go about building one?

    - by John Stewart
    Alright.. I am on a mission to learn iPhone development as much as possible. At my current job they have requested me if I can build a vnc viewer in iPhone.. there are many vnc apps but i want to learn how to build an app like that.. what would be the architecture of this app how should i organize my app? Any thoughts? comments?

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  • How to make validation for a textbox that accept only comma(,) & digit in c# web application?

    - by prateeksaluja20
    Hello Experts, I am working on a website.I am using C# 2008.I want to make a text box that accept only numbers & comma(,). for example-919981424199,78848817711,47171111747 or there may be a single number like 919981424199. I was able to do one thing My text box only containing number by using this Regular Expression validation.in its property-Validation Expression i wrote "[0-9]+". This is working but now my requirement is to send bulk SMS & each number is separated by (,). I tried a lot but not getting the ans.so please help me to sort out this problem. Thanks in advance.

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  • How To Join Tables from Two Different Contexts with LINQ2SQL?

    - by RSolberg
    I have 2 data contexts in my application (different databases) and need to be able to query a table in context A with a right join on a table in context B. How do I go about doing this in LINQ2SQL? Why?: We are using a SaaS product for tracking our time, projects, etc. and would like to send new service requests to this product to prevent our team from duplicating data entry. Context A: This db stores service request information. It is a third party DB and we are not able to make changes to the structure of this DB as it could have unintended non-supportable consequences downstream. Context B: This data stores the "log" data of service requests that have been processed. My team and I have full control over this DB's structure, etc. Unprocessed service requests should find their way into this DB and another process will identify it as not being processed and send the record to the SaaS product. This is the query that I am looking to modify. I was able to do a !list.Contains(c.swHDCaseId) initially, but this cannot handle more than 2100 items. Is there a way to add a join to the other context? var query = (from c in contextA.Cases where monitoredInboxList.Contains(c.INBOXES.inboxName) select new { //setup fields here... });

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  • custom helpers inside each block

    - by Unspecified
    myArray = [{name: "name1", age: 20}, {name: "name2", age:22}]; {{#each person in myArray}} {{#myHelper person}} Do something {{/myHelper}} {{/each}} Handlebars.registerHelper(function(context, options){ if(context.age > 18){ return options.fn(this); }else{ return options.inverse(this); } }) In the above code when I tried to debug my custom helper it shows the context="person" while I want the context to be the person object, what's wrong with my code ? I found a similar question here but did not get it either...

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  • Asp.net 3.5 Deployment issue

    - by peter
    For deploying my website in server by using IIS 5.1,,i created virtual directory,,i browsed in to my application and selected asp.net 2.0 tab(application is framework3.5)..I reset framwork configuratio 2,0 Runtime security Policy Enterprise,Machine,User tab,,What ever things i can do i did Still also application is working properly,,but i am not able to deploy it in IIS i am getting this error If i browse Login.aspx i am getting ** Server Application Unavailable The web application you are attempting to access on this web server is currently unavailable. Please hit the "Refresh" button in your web browser to retry your request. Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur. ** Is it with IIS 5.1?? Here my machine is acting as server ,It has xp professional 2002 service pack 2 and IIS 5.1

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  • MVC C# Controller Method to return Tables

    - by Rob Tiu
    I'm a real beginner with MVC and my issue is this, I have a mdf database with multiple tables and I want to have a method return "ANY" table from the database and pass it to a aspx view. Examples of other tables in the database: Articles, Products, Supplies Here is an example of my code to view an Article Table from the database: //USING LINQ-SQL CONTEXT DATABASE public ActionResult ArticlePage() { tinypeas_db_contextDataContext context = HttpContext.Application["context"] as tinypeas_db_contextDataContext; try { return View(context.Articles); } catch { return Json(false, JsonRequestBehavior.AllowGet); } } How would I modify this method to dynamically pass any table to the view? Or should I be using something else other than Linq-to-SQL

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  • Application Code Redesign to reduce no. of Database Hits from Performance Perspective

    - by Rachel
    Scenario I want to parse a large CSV file and inserts data into the database, csv file has approximately 100K rows of data. Currently I am using fgetcsv to parse through the file row by row and insert data into Database and so right now I am hitting database for each line of data present in csv file so currently database hit count is 100K which is not good from performance point of view. Current Code: public function initiateInserts() { //Open Large CSV File(min 100K rows) for parsing. $this->fin = fopen($file,'r') or die('Cannot open file'); //Parsing Large CSV file to get data and initiate insertion into schema. while (($data=fgetcsv($this->fin,5000,";"))!==FALSE) { $query = "INSERT INTO dt_table (id, code, connectid, connectcode) VALUES (:id, :code, :connectid, :connectcode)"; $stmt = $this->prepare($query); // Then, for each line : bind the parameters $stmt->bindValue(':id', $data[0], PDO::PARAM_INT); $stmt->bindValue(':code', $data[1], PDO::PARAM_INT); $stmt->bindValue(':connectid', $data[2], PDO::PARAM_INT); $stmt->bindValue(':connectcode', $data[3], PDO::PARAM_INT); // Execute the statement $stmt->execute(); $this->checkForErrors($stmt); } } I am looking for a way wherein instead of hitting Database for every row of data, I can prepare the query and than hit it once and populate Database with the inserts. Any Suggestions !!! Note: This is the exact sample code that I am using but CSV file has more no. of field and not only id, code, connectid and connectcode but I wanted to make sure that I am able to explain the logic and so have used this sample code here. Thanks !!!

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  • Why cast null before checking if object is equal to null?

    - by jacerhea
    I was looking through the "Domain Oriented N-Layered .NET 4.0 Sample App" project and ran across some code that I do not understand. In this project they often use syntax like the following to check arguments for null: public GenericRepository(IQueryableContext context,ITraceManager traceManager) { if (context == (IQueryableContext)null) throw new ArgumentNullException("context", Resources.Messages.exception_ContainerCannotBeNull); Why would you cast null to the type of the object you are checking for null?

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  • I am using selenium IDE to automate a web based email application.

    - by user350451
    But however, using firebug I can not find any of the elements or objects on the page. For example: there are tabs for mail, calendar, contacts etc. When I right click on these tabs brings up no menu. I know this is a java script but how to figure out and automate using Selenium IDE? http://demo2.zimbra.com/zimbra/mail#1 -- This is the web site I am trying please check it out for yourself... Thanks, R.

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  • How can I add SOAP Headers to a WSDL generated Borland C++ Builder 6 application.

    - by MJG
    Using a WSDL that requires a SOAP HEADER for Authentication (fragment below) code that gets generated when creating a web service client via the "WSDL Importer" has no concept of the Authentication Headers and there are no examples in BCB6 C++ Examples/WebServices directories that show how, and nothing on Web that I can find. Anyone with BCB6 C++ (not Delphi) have an example of adding SOAP Headers to a TRemotable subclass? <s:element name="AuthenticationHeader" type="tns:AuthenticationHeader"/> <s:complexType name="AuthenticationHeader"> <s:complexContent mixed="false"> <s:extension base="tns:UserAuthHeader"> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="Function" type="s:string"/> <s:element minOccurs="1" maxOccurs="1" name="TimeOutMilliSec" type="s:int"/> </s:sequence> </s:extension> </s:complexContent> </s:complexType> <s:complexType name="UserAuthHeader"> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="Username" type="s:string"/> <s:element minOccurs="0" maxOccurs="1" name="Password" type="s:string"/> </s:sequence> <s:anyAttribute/> </s:complexType>

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