I got an ashx file to create an image. I am referencing it via web.config like this:
<add verb="*" path="captcha.ashx" validate="false" type="eVoila.Security.Captcha.CaptchaImageHandler, eVoila" />
My handler looks like that:
[Code]....
Actually the handler never gets called. I already searched the forums and tried some tips and hints. But nothing of that worked. Try to call the url via[URL]
I 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'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't done anything to call them? I don't want asynchronous handling, and I certainly didn't do anything explicit to get it. My controllers all derive from Controller, not AsyncController.
I don't have the source code with me right now, but I can add it later if needed. I was hoping someone might know some of the reasons why BeginProcessRequest might be called when it's not wanted.
I have an IHttpHandler that I would like to hook into the OutputCache support so I can offload cached data to the IIS kernel. I know MVC must do this somehow, I found this in OutputCacheAttribute:
public override void OnResultExecuting(ResultExecutingContext filterContext) {
if (filterContext == null) {
throw new ArgumentNullException("filterContext");
}
[Code]....
I am trying to add page with custom extension, say .asp2 with my set of html tags.Now whenever i try to access the page on browser...it asks me "Save as". This happens because I am using an extn which the server is not able to recognise.What should I do to so that my server, IIS 5.1 recognises this extension??
how to associate custom events on such custom page?
I am trying to implement an IHttpHandler. I have defined an appropriate class but the debug web server (you know, the one you get if you hit f5 in Visual Studio) is responding with "Can't Display Page".I looked here http://msdn.microsoft.com/en-us/library/ms228090%28v=VS.90%29.aspx to learn how to configure the handler, and it seems there are different ways for IIS6 and 7. But the process is put something in the web.config and then set it up in IIS Manager. However, that is a deployment issue. I want to be able to run it in the test server, and I don't know how to do this second step in the test server.I put the following in my web.config:
<httpHandlers>
<add verb="*" path="*.sample"
type="MyNamespace.Code.HelloWorldHandler"/>
</httpHandlers>
HelloWorldHandler is the code from the link above (wrapped in MyNamespace.)
Can someone let me know how to configure this correctly for the development server?
I'm working on a reporting script which runs a number of reports (pdf) on button click. The reports are created on the web server then I'd like the user to be given the option to download the files. I have worked out the script for downloading one file from the server. But I'm not sure how to download multiple files? (there will probably be about 50)
After I run one report I redirect the user to a http handler script.
Response.Redirect("Download.ashx?ReportName=" + "WeeklySummary.pdf");
public class Download : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
[Code]....
I have a IHttpHandler that acts as a source to a jQuery Autocomplete input field. In the constructor of the handler I generate an index that remains fairly static between request (needs to be rebuilt maybe once a day).How can I cache the the index between calls? Debugging indicates that the constructor is called for each request. I've set IsReusable to "false".
View 2 RepliesI want to create an HTTP handler within my project. To do this, I created a new class, and tried to implement IHttpHandler.
Each time I do this, I get the error 'End of statement expected'.
I know that normally you can create a new class library and create a class to implement a handler. But why is it not possible to do this in an existing web project?
I have an IHttpHandler that implements IRequiresSessionState. Everything works fine on most servers but there are 2 servers (one IIS 7.0 and one IIS 7.5) that give me null sessions. Aspx pages are fine on every server. I've searched for hours and failed to find anything that is not related to IRequiresSessionState.
View 1 RepliesI am trying to create url routing like this[URL] but I am having few questions , first why he is adding lines to the web.config , I tested it and it didnt appear that they're doing something as I commented them and nothing major appeared second I am having this line of code that is crashing var display = BuildManager.CreateInstanceFromVirtualPath(_virtualPath,typeof(Page)) as IProfileHandler;
when casted as ihttphandler it's working , but when I am casting it to iprofilehandler(which is implemeting ihttphandler) it's giving null !
First, I'm looking for a a small example of how to handle a series of RESTful URLs, such as /Account/{userName} and /Account/{userName}/Profile with a single HttpHandler. At this time, I'm not interested in embracing MVC or using the REST Starter Kit. Should I place the HttpHandler class in a Class Library? Should I publish to the root of the RESTful URL?
My second issue stems from the fact that my ASP.NET hosting is done through a web-hosting company. Will I need to ask their tech team to configure IIS for me? Is that normal practice?
I want to implement a restful service in ASP.NET. I want it to be compatible with .Net 2.0 and IIS 5+. I am constrained to not use ASP.NET MVC or REST starter kit. By reading on internet I have learned that it can be implemented using HTTPHandlers. The problem is, the request will come in as a POST request. And I want to URL to be like:
http://abc.com/MyService/MyMethod1/
and
http://abc.com/MyService/MyMethod2/
I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)Code is as follows.
[Code]....
Can u explain me what ASHX HttpHandler uses for?
View 7 RepliesThere is an ashx file containing "ProcessRequest(HttpContext context)" method which gets triggered automatically. When and how does it get fired?Another question, How can I get the current QueryString when I am inside this file? When I type "context.Request.QueryString" it says it's null or empty although the address have arguments.
View 1 RepliesI've got a simple ASHX handler that returns an dynamically generated image; the image is generated from a custom created class, and an object belonging to this class is passed to the handler using Session (I'd rather avoid using QueryString).The handler is used as the URL of an image on a ASP form which is very simple: a drop down list, a button and an image. Basically, depending on what the user selects from the list, the appropriate image will be generated once the button is pressed.
At the start the actual image has it's Visible property set to false; I don't want the handler to display anything before the data is all there.Once the button is pressed, the required Session parameter is added containing the necessary object, and the page is refreshed using Server.Transfer. When the Page_load method detects that the Session parameter has been correctly set, it sets the Visible parameter on the image to true.After that the handler fires up and generates the image.
So far so good... However, if the user now picks something different from the list and presses the button, despite the correct object being passed in the Session, the image won't be updated. In fact, the handler won't even fire up (if I put a breakpoint in there). I need to close the browser window and reopen it for it to work.Any ideas what could be the cause of such behaviour?I suspect the answer is very simple, and I just don't know something fundamental about ASP (or handlers)...
In my web application I use an ashx file to write a file to the browser. I've noticed that there's no compression over the .ashx file, but only over my .aspx files.
Is it possible to compress .ashx? And if it is possible, how?
Currently I use global.asax to handle the compression:
<%@ Application Language="C#" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.IO.Compression" %>
<script runat="server">
void Application_PreRequestHandlerExecute(object sender, EventArgs e)
{
HttpApplication app = sender as HttpApplication;.......
As you can see only files which inherit from 'Page' are compressed, and my ashx file is not of type Page. So I added a condition and now it works just fine:
if (!(app.Context.CurrentHandler is Page ||
app.Context.CurrentHandler.GetType().Name == "SyncSessionlessHandler" ||
app.Context.CurrentHandler is ViewMht // This is the type I had to add
) ||
app.Request["HTTP_X_MICROSOFTAJAX"] != null)
return;
What is the Difference betweeen axd and ashx handlers.
View 3 RepliesMy web site has a handler (FileDownload.ashx) that deals with all file download requests. I've recently migrated my site to ASP.Net 4.0, and it now uses routing extensively. Everything works fine when dealing with page requests (aspx), but it's not working with my handler - I encounter the following error:
Type '<snip>.Handlers.FileDownload' does not inherit from 'System.Web.UI.Page'.
This makes sense, as routing is only implemented in the page. So, my question is, what steps do I need to take to be able to use routing and my ASHX together? I want to be able to extract RouteData.Values from the url.
public class FileDownload : IHttpHandler
{
}
sitemap is at: http://localhost/scirranew/sitemap.ashx
<%@ WebHandler Language="C#" Class="SiteMap" %>
using System;
using System.Web;
[code]...
i have a handler(.ashx) that returns an html . i want to call the handler in .ashmx(webservice). how do i call it?
View 1 RepliesI would like to use Server.UrlEncode in .ashx.
I try with the following code.
HttpServerUtility ser = new HttpServerUtility();
ser.UrlEncode(pfile.FileName);
That's wrong but however I would like to use Server.UrlEncode so let know the way.
I have created webpage and I am calling it from Jquery function. Technically I am {info} is image button and I am replacing with it with aspx
.replace("${info}","/_layouts/webpage.aspx");
The web page is opening in new browser window. Is there any way that I could make it as pop up whereever I can place in the page. That is get rid off the toolbar address bar. It should look like a pop up.
I am using ashx to serve images from a database, is there anyway to have a user click on a link that allows them to download the file on the computer. (IE it shows the Save Dialog) Like you download a file.
View 2 RepliesI've been trying to use the jQuery plugin Colorbox to display images I have in my DB through an ashx file. Unfortunately it just spits a bunch of gibberish at the top of the page and no image. Can this be done? Here is what I have so far:
$(document).ready
(
function ()
{
$("a[rel='cbImg']").colorbox();
}
);
...
<a rel="cbImg" href="HuntImage.ashx?id=15">Click to see image</a>
UPDATE:
My ashx file is writing the binary out:
context.Response.ContentType = "image/bmp";
context.Response.BinaryWrite(ba);