{"id":3711,"date":"2014-03-29T08:20:39","date_gmt":"2014-03-29T08:20:39","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/29\/problem-about-ihttphandler-collection-of-common-programming-errors\/"},"modified":"2014-03-29T08:20:39","modified_gmt":"2014-03-29T08:20:39","slug":"problem-about-ihttphandler-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/29\/problem-about-ihttphandler-collection-of-common-programming-errors\/","title":{"rendered":"problem about ihttphandler-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e5f75dedd0c85c4837008bc96ca910e9?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nGerrie Schenck<br \/>\n.net asp.net httphandler ihttphandler<br \/>\nI&#8217;m working on an IHttpHandler implementation which will handle all *.gif files. The Handler itself will have code in it to check whether the *.gif files are requested from a certain URL. If this is the case, some customer logic should be performed to put a customer gif in the response.But I don&#8217;t know what to do when a regular gif is requested. This should be processed as normal. How do I do this?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/297e728fc79110ee2ea25ccc69a8ffae?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJon Seigel<br \/>\nasp.net asp.net-mvc-2 ihttphandler ihttpasynchandler<br \/>\nI made a custom handler that derives from MvcHandler. I have my routes using a custom RouteHandler that returns my new handler for GetHttpHandler(), and I override ProcessRequest() in my custom handler. The call to GetHttpHandler is triggering a breakpoint and my handler&#8217;s constructor is definitely being called, but BeginProcessRequest() is being called on the base MvcHandler instead of ProcessRequest(). Why are the async methods being called when I haven&#8217;t done anything to call them? I don<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8478eff66a35ec01bb5c0563fdfe56ac?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser256890<br \/>\nasp.net web-config ihttphandler<br \/>\nI had an ASP.NET 2.0 web project. Worked fine. I decided to upgrade the site to 3.5. The upgrade worked fine. I have added a IHttpHandler that required to include the following line in the web.config:&lt;add verb=&#8221;GET,POST&#8221; path=&#8221;MyOperation.asmx&#8221; type=&#8221;MyClass&#8221;\/&gt;This line in the web.config generates the following error: &#8220;Parser Error Message: Could not load type &#8216;MyClass&#8217;.&#8221; This sounds like a typical spelling error in the class name. But it looks not, I checked it 1000 times. However, what i<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/0e5382bdde29f6723d8236956d7e7187?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nSunday Ironfoot<br \/>\nc# asp.net httphandler web-config ihttphandler<br \/>\nPossible Duplicate:Any way to add HttpHandler programatically in .NET? Is there a way I can dynamically register an IHttpHandler in C# code, instead of having to manually add it to the system.web\/httpHandlers section in the web.config.This may sound crazy, but I have good reason for doing this. I&#8217;m building a WidgetLibrary that a website owner can use just by dropping a .dll file into their bin directory, and want to support this with minimal configuration to the web.config.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2dfe31131d62b675b10d7b02284d5303?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nflq<br \/>\nc# .net asp.net-mvc url-routing ihttphandler<br \/>\nusually, when I look at a ASP.Net MVC application, the Route table gets configured at startup and is not touched ever after. I have a couple of questions on that but they are closely related to each other:Is it possible to change the route table at runtime? How would\/should I avoid threading issues? Is there maybe a better way to provide a dynamic URL? I know that IDs etc. can appear in the URL but can&#8217;t see how this could be applicable in what I want to achieve. How can I avoid that, even tho<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/caf50cc5e252b6f332592482d1e4ab6f?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nbaron<br \/>\nc# .net visual-studio-2008 webclient ihttphandler<br \/>\nI have a web service in which I am manipulating POST and GET methods to facilitate upload \/ download functionality for some files in a client\/server style architecture. Basically the user is able to click a button to download a specific file, make some changes in the app, then click upload button to send it back.Problem I am having is with the download. Say the user expects 3 files 1.txt, 2.txt and 3.txt. Except 2.txt does not exist on the server.So I have code like (on server side):public class<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/eaba4dee841da348c142809f08b738ea?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nObalix<br \/>\nc# web-services ihttphandler<br \/>\nI&#8217;ve got a problem with simply method whch gets string from asp.net 4 ashx. I&#8217;m running below methods from silverlight application which is being hosted by this asp.net application.private void LoadPlugins(){var serviceAddress = _baseAddress+ &#8220;PluginsService.ashx?&#8221;+ DateTime.Now.Ticks;var client = new WebClient();client.DownloadStringCompleted += client_DownloadStringCompleted;client.DownloadStringAsync(new Uri(serviceAddress));}void client_DownloadStringCompleted(object sender,DownloadStringCom<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/1f7269cccca4f69aa205df4333af1eac?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nGowthamanSS<br \/>\nc# session context ihttphandler ihttpmodule<br \/>\nI have an ASP.NET application and dll which extends IHttpModule.i have used the below method to save the session variables in httpcontext through public class Handler : IHttpModule,IRequiresSessionState{public void Init(HttpApplication httpApp){httpApp.PreRequestHandlerExecute += new EventHandler(PreRequestHandlerExecute); }public void PreRequestHandlerExecute(object sender, EventArgs e){var context = ((HttpApplication)sender).Context;context.Session[&#8220;myvariable&#8221;] = &#8220;Gowtham&#8221;;} }and in my asp.ne<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/95d7227260edc5136f063d6675621811?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nultranaut<br \/>\nc# javascript silverlight ihttphandler<br \/>\nI am using a handler to act as a proxy between a server with a string (actually a xml but I am trying for a string) and my Silverlight app. I have written the handler and it properly collects the string(xml). The problem I am having is converting that string from the JSON into a string that javascript can pass back to my Silverlight code. Javascript:&lt;script src=&#8221;http:\/\/ajax.googleapis.com\/ajax\/libs\/jquery\/1.6.2\/jquery.min.js&#8221; type=&#8221;text\/javascript&#8221;&gt;&lt;\/script&gt; &lt;script type=&#8221;text\/jav<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/472fa883cb41427ebae653ca1cb6005b?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nMoonLight<br \/>\nc# asp.net session httpcontext ihttphandler<br \/>\nI have a situation like the one described in this thread: How can i get the value of a session variable inside a static method in c#?However, there are no static methods here (just a class inherited from IHttpHandler) Here is my code:&lt;%@ WebHandler Language=&#8221;C#&#8221; Class=&#8221;Telerik.Web.Examples.FileExplorer.FilterAndDownloadFiles.Handler&#8221; %&gt;using System; using System.Data; using System.Configuration; using System.Web; using System.Text; using Telerik.Web.UI;namespace Telerik.Web.Examples.FileE<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gerrie Schenck .net asp.net httphandler ihttphandler I&#8217;m working on an IHttpHandler implementation which will handle all *.gif files. The Handler itself will have code in it to check whether the *.gif files are requested from a certain URL. If this is the case, some customer logic should be performed to put a customer gif in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3711","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3711"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3711\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}