Comments on: Solution: Invalid FORMATETC structure

By: MyViewState.NET | “The operation could not be completed. Invalid FORMATETC structure.”

Thu, 07 Jan 2010 03:26:27 +0000

[...] point or another. This error has popped up in numerous blogs and forum posts and there’s a list of solutions (and possible causes) which seems to work for most folks. Well, the bug still rears its ugly head [...]

By: Damien

Damien — Wed, 06 Jan 2010 16:29:45 +0000

Hi there,

For me it was the read-only attribute of my web.config file which was checked!

It appears too when trying to add a user control from a non-standard library with a bad structured web.config (close tag not present for instance).

The designer add automatically assembly dependancies in web.config and add the close tag on the same line after the last dependance. When deleting all dependances, I delete the close tag too… Oups! When I tried to add the user control (non-standard one) on my page, the error has thrown.

Best wishes…

Ciao

By: Oliver

Oliver — Tue, 22 Dec 2009 18:37:22 +0000

1. Right click on your project, Select “Clean”
2. Right click on your project, Select “Build”

Cheers.

By: Basem

Basem — Tue, 08 Dec 2009 14:49:25 +0000

In Team system 2008 looks like the VS can not somehow overwrite the web.config file .. so you need to manually add a couple of lines to your web.config … what are they ????
simply do the following:
1- create new local website.
2-add report viewer component to the default page
3- see the changes on the web.config file and add them to your original non-working website.

PEACE ..

By: Ruan

Ruan — Tue, 08 Dec 2009 11:24:20 +0000

Thank you very much. Resetting the toolbox worked.

By: Corse

Corse — Sun, 06 Dec 2009 14:57:32 +0000

thank you! reset of toolbox solved this issue.

By: alex clarke

alex clarke — Tue, 24 Nov 2009 16:24:53 +0000

This line is wrong
[ToolboxData( "" )]

This line is correct
[ToolboxData( "" )]

’server’ element in “runat=server” directive must be surrouned with quotation marks

By: Rahul

Rahul — Fri, 13 Nov 2009 07:42:47 +0000

Thank u very much
it worked

Rahul

By: Daniel

Daniel — Tue, 03 Nov 2009 20:02:34 +0000

Reset tool box = WIN! Thanks, bud!

By: Claudio Friederich

Claudio Friederich — Thu, 29 Oct 2009 00:06:58 +0000

In WebControls that are derived from others, no control in the inheritance chain is permitted 1) to have ToolBoxItem(False), or 2) be without a valid ToolBoxData attribute, otherwise the error occurs. This applies even to MustInherit/abstract controls. That last point is important. Note that abstract controls, due to their abstract nature, are automatically excluded from toolbox.