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Tip of the Day
Language: .NET
Expertise: Beginner
Nov 12, 2007

Invoking a Client-side JavaScript Function from the Server-side Code

.NET allows you to call a JavaScript function from the server-side code. For example, suppose you want to to display a message box to the user. This can be accomplished in two steps:
  1. Write a JavaScript function in the HTML view of the page inside the <HEAD></HEAD> elements as shown below:
    
    <script language="javascript">
    	function ShowAlert()
    	{
    	   alert('Invoking from the server side code.');
    	}
    </script>
    
  2. In the code behind file of the .aspx page, add the following line of code in the page load function:
    
         private void Page_Load(object sender, System.EventArgs e)
         {
            Button1.Attributes.Add("OnClick", "ShowAlert();");
         }
    
Now, compile the project and run it. Clicking the button on the page, you can see the message box displayed.

Deepak Choudhari
 
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