Can I Tap into ASP.NET Functionality from JavaScript?

Aspiring web developers seeking to enhance their ASP.NET projects with JavaScript may encounter a common question: is it feasible to access custom ASP.NET methods from JavaScript's click events?

The answer lies within the intricacies of ASP.NET's postback mechanism. Without relying on external libraries, it's possible to achieve this integration through the following steps:

1. Implementing IPostBackEventHandler:

Embrace the IPostBackEventHandler interface within your Page class to establish a connection between ASP.NET and JavaScript.

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

2. Specifying the RaisePostBackEvent Method:

Consequently, the RaisePostBackEvent method will be automatically added to your code file.

public void RaisePostBackEvent(string eventArgument)
{
}

3. Tying the JavaScript to the ASP.NET Event:

When configuring the JavaScript onclick event, utilize the following code snippet:

var pageId = '';
__doPostBack(pageId, argumentString);

4. Triggering the Custom ASP.NET Method:

Upon executing this JavaScript code, the RaisePostBackEvent method within your ASP.NET code file will be invoked with the specified eventArgument from JavaScript. This allows you to seamlessly bridge the gap between JavaScript functionality and custom ASP.NET methods.