Can I Call ASP.NET Functions from JavaScript Click Events Without Ajax?

Call ASP.NET functions from JavaScript click events without using Ajax

Scenario:

You have an ASP.NET web page that contains JavaScript code and a submit button with a click event. You're wondering if it's possible to call an ASP.NET method from a JavaScript click event.

Answer:

Yes, it is possible to call ASP.NET methods from a JavaScript click event without using Ajax or other technologies. Here’s how:

Steps:

1. In your code file, implement the IPostBackEventHandler interface in your Page class:

   <code class="language-csharp"> public partial class Default : System.Web.UI.Page, IPostBackEventHandler</code>

2. This will add the RaisePostBackEvent method to your code file:

   <code class="language-csharp"> public void RaisePostBackEvent(string eventArgument) { }</code>

3. In the JavaScript click event handler, use the following code:

   <code class="language-javascript"> var pageId = '';
    __doPostBack(pageId, argumentString);</code>

This will call the RaisePostBackEvent method passing the arguments specified in argumentString as event parameters. From here, you can call any other events you want.

Note:

• Use double underscores __doPostBack with no spaces between the underscores.
• The P.S. in the original answer refers to Markdown syntax and has nothing to do with this discussion.

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