I\'m using vs 2010. I need to display the message to user and redirect the page.
I use the below line.
ScriptManager.RegisterStartupScript(this, this
You need to write:
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", " alert('User details saved sucessfully'); window.open('frmDisplayUsers.aspx');", true);
Please note that I have removed the script tags as the last parameter true means you must not use the script tag.
This code worked for me. If you have any problem let me know. In addition you can use setTimeout to delay the window open that might not be a very bad choice.