How to Redirect to a New Browser Window Using Response.Redirect?

Using Response.Redirect to Open a New Browser Window

Web developers often need to redirect users to a new page without disrupting their current browsing session. While Response.Redirect is commonly used, opening the new page in a separate window can be tricky. This guide outlines the solution.

The key is a combination of client-side and server-side techniques:

1. Client-Side Target Modification: Add the attribute OnClientClick="aspnetForm.target='_blank';" to your server-side link or button. This forces the browser to open the link in a new tab or window.

2. Preventing Global New Window Behavior: To avoid all links opening in new windows, add this JavaScript function to the header of your popup window:

function fixform() {
    if (opener.document.getElementById("aspnetForm").target != "_blank") return;
    opener.document.getElementById("aspnetForm").target = "";
    opener.document.getElementById("aspnetForm").action = opener.location.href;
}

3. OnLoad Execution: Include onload="fixform()" in the tag of your popup window. This ensures the fixform() function runs when the page loads, correcting the form's target attribute.

By implementing these three steps, a server-side call to Response.Redirect("MyPage.aspx") within an OnClick event will successfully open "MyPage.aspx" in a new browser window, leaving the original page intact.

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