Question

I try to open a popup window with JavaScript before redirecting to another page.

I’ve written this code:

ScriptManager.RegisterStartupScript(this.Page, typeof(Page), "abc", "window.open('http://yahoo.com','2','resizable=yes,directories= no,menubar=no,top=null,left=00, width=100,height=100')", true);
Response.Redirect(p.Url);

but it is only a redirect and a popup does not open.

How do I open a popup window before the user user redirects to another page?

Answer 1

If you are doing anything like opening popup or window…before response.redirect(); , it will not work. If you want to redirect to any page after opening pop up boxes, please ensure that redirection should be written in Javascript only not in C#

This will not work

Response.Write("<script language='javascript'>alert('hello')</script>");  
Response.Redirect("About.aspx"); <br>

This will work

Response.Write("<script language='javascript'>alert('hello');
window.location.href='About.aspx';</script>");

OR

if (!ClientScript.IsStartupScriptRegistered("alert"))
{ 
Page.ClientScript.RegisterStartupScript(this.GetType(), "alert",     "alertMe();window.location.href='About.aspx';", true);
}

In this way we can call External JS files also

 Page.ClientScript.RegisterStartupScript(this.GetType(),    "callJS", 
 "&alt; script language='javascript' src='sample.js' &glt;  ");