How to close a modal using javascript from code behind?

Question

So far I have tried this:

Page.ClientScript.RegisterStartupScript(this.GetType(), 
 "closePage", 
 "window.returnValue='http://sp-pubdev:88/Resources/Images/testFile.png';
 alert(window.returnValue);
 SP.UI.ModalDialog.commonModalDialogClose(SP.UI.DialogResult.OK);", true
);

and this:

Page.ClientScript.RegisterStartupScript(this.GetType(), 
 "closePage", 
 "window.returnValue='http://sp-pubdev:88/Resources/Images/testFile.png';
 alert(window.returnValue);
 window.close();", true
);

With both of these I will see my alter, but the window never closes. Is there something else I need to be doing here?

Answer 1

In code behind u close model popup like this

Response.Write("<script type='text/javascript'>window.frameElement.commitPopup();</script>");
                      Response.Flush();
                      Response.End();

I hope u use application page otherwise u not get Response object

Answer 2

I hope this helps:

1. How to close show model dialog box in codebehind.

EDIT

I found this blog and goes into detail on closing a modal dialog!

SharePoint 2010: Closing a ModalDialog Manually from Code (C# and JavaScript).