title: ASP.NET Web Application Message Box
body: <p>In an asp.net windows forms application, in the C# code behind you can use: </p>
  
  <pre><code>MessageBox.Show("Here is my message");
  </code></pre>
  
  <p>Is there any equivalent in a asp.net web application?
  Can I call something from the C# code behind that will display a message box to the user?</p>
  
  <p>Example usage of this:  I have a button that loads a file in the code behind.  When the file is loaded or if there is an error I would like to popup a message to the user stating the result.</p>
  
  <p>Any ideas on this?</p>