How can the closure of the current browser tab through a programmatic button click be avoided in an .aspx file?

edit

One way to avoid closure of the current browser tab through a programmatic button click in an .aspx file is by using the event.preventDefault() method in JavaScript. This method can be called on the button click event to prevent the default action of the browser, which is to close the current tab.

Here's an example:

HTML button:

<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClientClick="return onSubmitClick();" />

JavaScript function:

function onSubmitClick() {
  // Perform some validation or other operations here

  // Prevent the default action of the browser, which is to close the current tab
  event.preventDefault();

  // Perform other actions here, such as submitting the form data using Ajax
}

By calling the event.preventDefault() method in the onSubmitClick() function, the closure of the current browser tab can be avoided when the submit button is clicked.