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Error - Operation is not valid due to the current state of the object.

, 21 Feb 2012
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How to solve this error.

Whenever a postback is done, this error occurs when form fields are very large in number. The stack trace is:

at System.Web.HttpValueCollection.ThrowIfMaxHttpCollectionKeysExceeded() at System.Web.HttpValueCollection.FillFromEncodedBytes(Byte[] bytes, Encoding encoding) at System.Web.HttpRequest.FillInFormCollection()

By default, the maximum value of MaxHttpCollection is 1000.

To solve this error, increase the MaxHttpCollection value. Try adding the following setting in your web.config's <appsettings> block.

<appSettings>
    <add key="aspnet:MaxHttpCollectionKeys" value="2001" />
</appSettings>

It can solve your problem. If you have very large records on your page, say 600 records in a grid, and you click on Submit, then increase the value of MaxHttpCollection.

Then change value 2000 to 5000 and test again. It will be resolved. Smile | :)

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Sarvesh Kumar Gupta
Software Developer (Senior) Edge Business Solution
India India
Working in Edge Business Solution as a Senior Software Developer. I have more than 7 years exp. in Microsoft Technologies. I have exp. in ASP.Net, C#, SQL 2000/2005/2008 R2, Javascript, Ajax, JQuery, MVC, LINQ etc.
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Comments and Discussions

 
GeneralThanx Pinmemberbhanu shrivastava19-Jul-12 2:35 
General1000+ form fields on one page? That sounds a little excessiv... PinmemberMarcus Kramer21-Feb-12 9:48 

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Web03 | 2.8.140922.1 | Last Updated 21 Feb 2012
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