How Can I Call ASP.NET Methods from JavaScript Click Events?

Accessing ASP.NET Functions from JavaScript

To invoke an ASP.NET method from JavaScript's click event, a non-standard approach can be employed. Here's a detailed guide:

1. Enhance Page Class with IPostBackEventHandler Interface:

   In your ASP.NET code file, inherit the Page class with the IPostBackEventHandler interface, like:

   public partial class Default : System.Web.UI.Page, IPostBackEventHandler

   This adds a "RaisePostBackEvent" method to your code.

2. Implement "RaisePostBackEvent" Method:

   The "RaisePostBackEvent" method must be implemented to handle the postback event. It remains empty by default.

3. Trigger Postback from JavaScript:

   In your JavaScript click event, invoke the postback using the following code snippet:

   var pageId = '<%=  Page.ClientID %>';
   __doPostBack(pageId, argumentString);

   Replace "argumentString" with any relevant data you want to pass to the "RaisePostBackEvent" method. The "pageId" variable ensures the postback is sent to the correct page.

By following these steps, you can successfully call ASP.NET methods from JavaScript's click event, enabling seamless interaction between client-side and server-side code.

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