Visual Studio 2008 Design Surface Error: "Operation could not be performed. Invalid formatetc structure."

Question

In the VS2008 website project, I have a page open in split mode. I am trying to drag an Infragistics web control onto the page design surface. Nothing happened. I am trying to drag it to htmlz. Dialog box with

The operation could not be completed. Invalid formatetc structure.

Subsequently, the draggable control is not displayed on the design surface or html.

The project compiles fine, works fine. The error is executed only during development.

I tried resetting the tools and re-adding the Infragistics controls. Cleaned up project and rebuilt solution.

reference

Additional info: this is not an error specific to Infragistics (e.g. http://www.google.com/search?q=the+operation+could+not+be+completed.+invalid+formatetc+structure&ie=utf-8&oe = utf-8 & aq = t ). There are various voodoo solutions on other boards, but I'm never happy with the vague "I reinstalled VS and then wiped my hd and then executed the unicorn victim on my keyboard, then it works!" Specific requests - what type of unicorn exactly?

Additional configuration information: Straightforward VS2008 without SP1 or installed products. You have corrections, but the latter were installed a couple of months ago (repeated actions are performed many times, since there are no problems).

Answer 1

DLL / web.config. / dll .

Answer 2

# -Express, WPF. . :

https://silverlight.net/forums/p/23191/82251.aspx

tho:

• -,% localappdata%\Microsoft\VisualStudio - vsexpress.
• *. tbd , !

.tbd !

Answer 3

Web.Config, , , .config. , ( , ). .

<system.web>
    <!-- 
        Set compilation debug="true" to insert debugging 
        symbols into the compiled page. Because this 
        affects performance, set this value to true only 
        during development.
    -->
    <compilation debug="true">
        <assemblies>
            <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="DevExpress.Web.v9.2, Version=9.2.9.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A"/>
            <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="DevExpress.Data.v9.2, Version=9.2.9.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A"/>
            <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/></assemblies>
    </compilation>

Answer 4

Visual Web Developer 2008 (VWDExpress), Silverlight. n8wrl, VWDExpress .tbd C:\Documents and Settings\\Local Settings\Application Data\Microsoft\VWDExpress\9.0. VWDExpress, .

Answer 5

FORMATETC, AjaxControlKit.dll bin.

All ajax tools were listed on the toolbar, so this was not immediately obvious.