CODEWITHSUNDEEP
c#winformsasp-classicinfopath
arvialways
arvialways

Reputation: 69

Error when trying to open a winform from an asp page

I have a simple winform that just has a Microsoft.Office.Infopath.FormControl object as a child control, and basically does nothing. When I run a standalone project, the form opens fine, but when called from an asp page ( Visual studio development environment), I get the following error.

Unable to get the window handle for the 'FormControl' control. Windowless ActiveX controls are not supported.

After a little research, I found that it might be because of MTA threads. I also set the apartment state to STA, and still am getting the same error.

This is required for a bigger project i'm working on to open infopath as a COM object.

Please advice.

P.S -- There is no need for example code because there is practically no code at all. All i'm doing in the asp page is :

Form1 myform = new Form1();

myform.Show();

//or

myform.ShowDialog();

Its really urgent!!

Upvotes: 0

Views: 167

Answers (1)

rerun
rerun

Reputation: 25495

You can not open a form from a web project. There is no message loop or even a desktop to display it on. You can interact with programs on the server but that is general done though a windows service which also shouldn't display forms. You need to reexamine your approach.

Upvotes: 2

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