Problems with WebForm_DoPostBackWithOptions after installing .NET4.5 RSS

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  bj_lappensch...

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  Problems with WebForm_DoPostBackWithOptions after installing .NET4.5

  Jan 09, 2013 06:35 PM|LINK

  We installed .NET 4.5 on a server with .NET 4.0 Asp.Net web applications. New .NET 4.5 applications work ok, but existing 4.0 webform applications have a problem: http post request with WebForm_DoPostBackWithOptions don't work anymore. If the requests are traced with Fiddler, Fiddler reports that the request body is empty. Something is going wrong. The weird thing is that the problem only occurs when using  IE, and not with Chrome or FireFox. Any ideas? Upgrading the 4.0 applications to 4.5 doesn't help either.

  Thanks,

  Bert-Jan

  • Edited by bj_lappenschaar on Jan 09, 2013 06:35 PM
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  radamanthys

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  Re: Problems with WebForm_DoPostBackWithOptions after installing .NET4.5

  Jan 10, 2013 09:03 PM|LINK

  Ate you running your sites on IIS?

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  bj_lappensch...

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  Re: Problems with WebForm_DoPostBackWithOptions after installing .NET4.5

  Jan 16, 2013 06:08 PM|LINK

  Yes, sites run on IIS 7.5

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  VarunGupta

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  Re: Problems with WebForm_DoPostBackWithOptions after installing .NET4.5

  Apr 15, 2013 12:12 AM|LINK

  Hello Bert-Jan,

  I am from .NET Framework Compatibility team. We would like to understand this better. Could you contact us on netfx45compat at microsoft dot com with small repro of your project that we can try in-house?

  Thanks

  Varun Gupta (Microsoft .NET Framework Compatibility Team)