Redirect to Another Page On Clicking OK in JavaScript Alertbox

Page Redirection after client script does not show the popup or alert box added to the code using ClientScript.RegisterStartupScript 

Example:

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Operation Completed')", true);

 Response.Redirect("~/default.aspx"); 

In this code you will not get the alertbox and will be simply redirected to default.aspx page.

Modify the code like below

this.Page.ClientScript.RegisterStartupScript(Page.GetType(), "alert", "alert('Operation Completed.');window.location='default.aspx';", true);  

This will show the alertbox and upon clicking OK you will be redirected to default.aspx page