ViewState In A HttpHandler?

Apr 9, 2010

I have an aspx page that I want to convert to an HttpHandler, but I'm struggling withewState that's been used in the code behind of the aspx page

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State Management :: Failed To Load Viewstate. The Control Tree Into Which Viewstate Is Being Loaded Must Match ?

Oct 9, 2010

Now here is the weird thing. First i am running it locally on the built in vs2008 web server.I load my control in fine, do a postback from a linkbutton, locally on my machine it all works fine, no issue.However when it goes onto my host, it falls over with the message:

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.Now i also load controls dynamically and use postbacks and things in the admin area of the site...and that works fine, however my front end just keeps failing? See the code behing below:

[Code]....

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State Management :: ViewState And ObjectDataSource / Getting Values From Viewstate In GetTopThemes?

Jan 11, 2011

I have problem getting values from viewstate in GetTopThemes.

<asp:ObjectDataSource
ID="sourceGetTopThemes"
runat="server"
TypeName="DBConnection"
SelectMethod="GetTopThemes"
EnableViewState="true"></asp:ObjectDataSource>

[Code]....

}

[Code]....

when the page is not Posted back, I saved all values in the viewstate.

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State Management :: ViewState - Does The Master Page Have Its Viewstate

Apr 30, 2010

I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..

1. I use masterpage on all the pages and I need viewstate for some of the pages but..

There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?

Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?

Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?

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C# - Page With ViewState Disabled Still Be Validating A Viewstate Field?

Sep 24, 2010

I have a shopping cart page (Cart.aspx) that has a button that will (sometimes) post to a third party payment gateway, if payment is necessary. The payment gateway will process the payment and then do a silent post to my website (Order.aspx) so I can update the order status.

Order.aspx always throws an invalid viewstate error, even though viewstate is disabled on the page.

What's happening is that Cart.aspx (which has viewstate enabled) posts to the payment gateway, and the gateway will post it back as part of the silent post. Even though Order.aspx has viewstate disabled and validation disabled, it still tries to validate the __viewstate field it's being given.

I know setting EnableViewState=false will disable the rendering of the __viewstate field, but if another page provides the field, shouldn't it still skip validation? I tried calling ViewState.Clear() on the Page_Init event of Order.aspx, but ViewState is apparently empty. how to get around this? I don't want to disable ViewState on Cart.aspx (in some cases it may be necessary), but I can't figure out how to clear it on Order.aspx.

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Why My HttpHandler Is Ignored

Jun 28, 2010

In an ASP.NET application, I need to do some changes on every CSS file sent.So I created an HttpHandler (inside the app itself), added:

<add verb="*" path="*.css" type="MyWebsite.CssTestHandler,MyWebsite"/>
to Web.config in system.web/httpHandlers and modified the handler like this:
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Using HttpHandler & HttpModules?

Apr 9, 2010

i know how to implement this thing..

but i have few question like..

wot is the major purpose of using HttpHandler & HttpModules..

and how they work with page life cycle..?did they get executed b4 page life cycle..?where i got more control and more power

in order to utilize HttpHandler & HttpModules..

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Can u explain me what ASHX HttpHandler uses for?

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I have created a HttpHandler to be used with SWFUpload to upload images to the server. This upload is done in an administration backend so users need to be authenticated to upload images.Initially I made the whole administration area deny annonymous users but because of the way SWFUpload appears to work it wouldn't work correctly with Forms authentication and would return a 302 status code.I had thought it would be possible to make the location of my handler public in Web.config and use context.User.Identity.IsAuthenticated in my handler to determine if the user is logged in.

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How can I tell from within an ASP.NET HttpHandler if it is executing because of a call to Server.Execute("myHandler.ashx")or because of the user linking directly to myHandler.ashx? (Besides using a querystring parameter).

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Httphandler And Httpmodule In .net?

Jan 7, 2011

As i know that asp.net fulfill all the requirements for any web application but what are the ground rules for creating custom httphandler and httpmodule in asp.net.Edit:For example I want to fetch image from database then what i should i use httphandler or normally read image from database.If httphandler then why?

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How To Test .net Httphandler

Jan 28, 2011

Im trying to write a small web application for forwarding requests to my page to the new pages on my web site. First off im implementing a IHttpHandler and in the ProcessRequest method i simple want to print out the requesting page, my conde looks like this:

public class RedirectHandler : IHttpHandler
{
public bool IsReusable
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get { return true; }
[code]...

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C# - Httphandler In .net Return A Value?

Nov 26, 2010

Can a httphandler in .net return a value? If yes how?

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MVC :: Communication Between HTTPHandler & Controller

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So I am working on a project in ASP.NET MVC 2 with C#.I have a View with a file upload but this is a flash component (.swf).The result of the file upload (the storing of the file and processing of data in the database) is done in a HTTPHandler.I would like the HTTPHandler to send information to my active controller.

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Encrypt Querystring Using HttpHandler

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How to encrypt querystring using HttpHandler?

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C# - Passing An Exception To An HttpHandler?

Dec 10, 2010

I am trying to pass an exception to an HttpHandler by doing the following:

catch (Exception e)
{
byte[] exceptionData;
MemoryStream stream = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Persistence));
formatter.Serialize(stream, e);
exceptionData = stream.ToArray();
WebClient client = new WebClient();
Uri handler = new Uri(ApplicationUri, "TransferException.axd");
#if DEBUG
ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(BypassAllCertificateStuff);
#endif
try
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}
catch (WebException) { }
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EDIT

I am getting the following exception on the client.UploadData() line.
"Content-Length or Chunked Encoding cannot be set for an operation that does not write data."

EDIT

Even if I change my call to be client.UploadString(location, "THIS IS A TEST!"); it still fails with the same exception.

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Configuration :: HttpHandler Two Web.config

Apr 1, 2010

I have an website in IIS 6.0 (windows 2003). Inside that I had configured another application (As IIS Application).

Now, When I uncommend a "add verb" tag in main web.config file, the webservice inside the application throws "404 file not found exception" Is there anything which I need to update in child web.config?

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Caching The Xml Response From A HttpHandler

Mar 15, 2010

My HttpHandler looks like:

[Code]....

How can I cache the entire xml document that I am generating?

Or do I only have the option of caching the DataTable object?

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HttpHandler And Session State?

Sep 3, 2010

I'm trying to fashion a solution which will simulate App_Offline.htm for remote access but still allow local users to test the website out. I found some various options that I am trying out but the best one doesn't seem to work for our ASP.NET(2.0) site which relies on session state being enabled on all of the pages.

The HttpHandler is added into web.config

<add verb="*" path="*.aspx" type="AppOffline.AppOfflineHandler, AppOffline" />

and when the class is called, it boils down to this:

public void ProcessRequest( HttpContext context )
{
this.context = context;

[code]...

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Jun 21, 2010

<asp:Image ID="imgVerify" Width="60" Height="18" runat="server" align="absmiddle" Style="border: 1px solid #999999" ImageUrl="/Common/GetCaptcha.aspx" />

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I'm using the RssToolkit for .net. I'm using an Httphandler to return rss feeds. The feedID is passed in as a querystring parameter. If no parameter is passed in, I would like to have the the handler return a feed that is an aggreate of some of the feeds that the handler can handle. What I'm wondering is, can the handler recurse?

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Apr 4, 2011

Providing web features through a custom HttpHandler such as in Elmah is extremely handy for ASP.NET Web Applications, because the handler can be embedded into any ASP.NET web app. It perfectly fits as a simple way to extend an existing web app. Now, developing any significant set of features through a custom handler is a very tedious process. I am wondering if it is possible to directly embed an ASP.NET Application into another one through a custom handler (as opposed to cut and pasting the whole app in a sub directory). Here is a small list of embedded web app that would be fit for such a purpose:

Health monitoring console. Provisioning console (for cloud web app with auto-scaling). App settings management console (considering a scheme IoC-settings-stored-in-DB). Each one of those web parts could be provided as an HttpHandler; but again implementation is really tedious. Does anyone know how to do that or how to achieve an equivalent behavior?

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HttpHandler ProcessRequest() Firing Twice?

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I have a strange issue where i have a a HttpHandler having its ProcessRequest() event firing twice.i have nothing else in the class except a pointer to a static method so i'm lost.I have done some googling to no avail even thought it appears a few people are having similar issues:

Code:

public bool IsReusable
{
get { return true; }

[code]...

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C# - Render HtmlGenericControl From A HttpHandler?

Feb 13, 2010

I have a set of code (noted below) in ProcessRequest(HttpContext context) in a generic handler .ashx file.

HtmlGenericControl holder = new HtmlGenericControl("div");
//Set holder's properties and customization
HtmlGenericControl button1 = new HtmlGenericControl("input");[code]....

Now as I am in a HttpHander, I want to get the HTML of holder control and write it through context.Respose.Write().

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