How Does __doPostBack() Enable Asynchronous Postbacks in ASP.NET?

Harnessing the Power of __doPostBack() for Asynchronous Postbacks in ASP.NET

ASP.NET's __doPostBack() function facilitates asynchronous postbacks, allowing server-side event handling without full page refreshes, thus enhancing user experience. Here's a practical guide:

First, create an HTML button to initiate the postback:

<code class="language-html"><!-- HTML button to trigger the postback --></code>

Next, implement the JavaScript function to execute the postback:

<code class="language-javascript">function SaveWithParameter(parameter) {
  __doPostBack('btnSave', parameter);
}</code>

Finally, in your code-behind, retrieve the postback parameters:

<code class="language-csharp">protected void Page_Load(object sender, EventArgs e) {
  string parameter = Request["__EVENTARGUMENT"]; // Access the passed parameter
  string controlID = Request["__EVENTTARGET"]; // Identify the originating control (btnSave)
}</code>

The code retrieves __EVENTARGUMENT (your parameter) and __EVENTTARGET (the control ID, 'btnSave'). This data is then available for server-side processing.

This method enables asynchronous postbacks, resulting in more responsive and engaging ASP.NET applications.

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