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Download URL-Encoded Form Data is Not Valid Error
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“The URL-encoded form data is not valid” Error Occurs for Screens with More than 1,000 Input Controls, such as Course Section Mark Entry Article # 1750 Problem A recent Microsoft Security Update restricts the amount of post-back items to 1,000 for a particular page. If a page reaches or exceeds this amount, users will receive the follow error: An unexpected error has occurred! The URL-encoded form data is not valid. Solution To correct this problem, please perform the following steps: 1. Find the DASL.config file in your deployment directory. 2. In that file, locate the <appSettings> section. 3. Add the following line to the end of that section (before the closing tag): <add key="aspnet:MaxHttpCollectionKeys" value="6000" /> 4. If you would like to see an example of where to place this new key, please see the Distribute\Web\web.config.sample file in the StudentInformation release files. 5. Run the dasl-web.cmd deployment command with the “config” parameter. Note: At this time, Software Answers is recommending 6, 000 as the setting. This 6,000 setting should not expose the vulnerability Microsoft has corrected and should allow screens with large amounts of data to save without error. Although we are recommending 6,000, it may be necessary for some customers to increase this number to resolve this issue. We recommend not increasing this value to more than 10,000. © 2011 Software Answers, Inc. All Rights Reserved. All other company and product names included in this material may be Trademarks, Registered Trademarks or Service Marks of the companies with which they are associated. Software Answers, Inc. reserves the right at any time and without notice to change these materials or any of the functions, features or specifications of any of the software described herein. Additional Comments Links that provide more information on the Microsoft Update: Microsoft Security Bulletin MS11-100 - Critical http://technet.microsoft.com/en-us/security/bulletin/ms11100?qstr=CR_CC%3d20111229OOBCA&CR_ID MS11-100: Vulnerability in the .NET Framework Could Allow Elevation of Privilege http://support.microsoft.com/kb/2638420 An ASP.NET request that has lots of form keys, files, or JSON payload members fails with an exception http://support.microsoft.com/kb/2661403 © 2011 Software Answers, Inc. All Rights Reserved. All other company and product names included in this material may be Trademarks, Registered Trademarks or Service Marks of the companies with which they are associated. Software Answers, Inc. reserves the right at any time and without notice to change these materials or any of the functions, features or specifications of any of the software described herein.
