Invalid postback or callback argument. Event validation is enabled using ”
I am getting the following error when I post back a page from the client-side. I have JavaScript code that modifies an asp:ListBox on the client side.
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WCF – How to Increase Message Size Quota
I have a WCF Service which returns 1000 records from database to the client. I have an ASP.NET WCF client (I have added service reference in asp.net web application project to consume WCF).
Has an event handler already been added?
Is there a way to tell if an event handler has been added to an object? I’m serializing a list of objects into/out of session state so we can use SQL based session state… When an object in the list has a property changed it needs to be flagged, which the event handler took care of properly before. However now when the objects are deserialized it isn’t getting the event handler.
Return XML from a controller’s action in as an ActionResult?
What is the best way to return XML from a controller’s action in ASP.NET MVC? There is a nice way to return JSON, but not for XML. Do I really need to route the XML through a View, or should I do the not-best-practice way of Response.Write-ing it?
How to use non-thread-safe async/await APIs and patterns with ASP.NET Web API?
This question has been triggered by EF Data Context – Async/Await & Multithreading. I’ve answered that one, but haven’t provided any ultimate solution.
What is the App_Data folder used for in Visual Studio?
When creating a new ASP.NET application in Visual Studio, a couple of files and folders are created automatically. One of those folders is called App_Data.
Difference between RegisterStartupScript and RegisterClientScriptBlock?
Is the only difference between the RegisterStartupScript and the RegisterClientScriptBlock is that RegisterStartupScript puts the javascript before the closing </form> tag of the page and RegisterClientScriptBlock puts it right after the starting <form> tag of the page?
How to increase the max upload file size in ASP.NET?
I have a form that excepts a file upload in ASP.NET. I need to increase the max upload size to above the 4 MB default.
How to set session timeout in web.config
I have tried very hard but cannot find a solution on how to set session timeout value for in-process session for an ASP.Net web application.
New asp.net charting controls – will they work with MVC (eventually)?
Scott Gu just posted about a new set of charting controls being distributed by the .NET team. They look incredible: http://weblogs.asp.net/scottgu/archive/2008/11/24/new-asp-net-charting-control-lt-asp-chart-runat-quot-server-quot-gt.aspx