To ensure the popup window stays on top of the parent page, you can use the window.open() method with specific focus-handling logic. JavaScript allows you to bring the popup window to the foreground using the focus() method.

// JavaScript function to open and keep the popup on top
let popupWindow = null;

function openPopup() {
    const popupUrl = "PopupPage.aspx?param1=Value1¶m2=Value2"; // URL of the popup
    const popupOptions = "width=800,height=600,scrollbars=yes,resizable=yes";

    // Open a new popup window or reuse the existing one
    if (!popupWindow || popupWindow.closed) {
        popupWindow = window.open(popupUrl, "PopupWindow", popupOptions);
    } else {
        popupWindow.focus(); // Bring the popup to the foreground if already open
    }

    // Periodically check if the popup is closed
    const checkPopup = setInterval(() => {
        if (popupWindow && popupWindow.closed) {
            clearInterval(checkPopup); // Stop checking once the popup is closed
            popupWindow = null; // Reset the reference
        }
    }, 500);

    return false; // Prevent any default behavior
}

Integration with ASP.NET Web Form

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MainPage.aspx.cs" Inherits="MainPage" %>

<!DOCTYPE html>
<html>
<head runat="server">
    <title>Main Page</title>
    <script type="text/javascript">
        // Include the JavaScript function here (copy the openPopup function above)
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <!-- Button to trigger the popup -->
            <asp:Button ID="btnOpenPopup" runat="server" Text="Open Popup"
                        OnClientClick="openPopup(); return false;" />
        </div>
    </form>
</body>
</html>

Keys Points:

  • The popupWindow.focus() method brings the popup to the foreground if it’s already open.
  • The if (!popupWindow || popupWindow.closed) condition ensures that only one popup is open at a time.
  • The setInterval() periodically checks if the popup window is closed and clears the reference when it is.
  • return false; in the OnClientClick ensures that the button does not cause a server-side postback.

Conclusion

  • When you click the button, a popup will open if it’s not already open.
  • If the popup is already open, it will be brought to the foreground.
  • The popup’s reference is reset if it is closed, so a new popup can be opened with subsequent clicks.

Above implementation ensures that the popup remains on top and avoids opening multiple instances of the popup window.

Leave a Reply

Your email address will not be published. Required fields are marked *

Explore More

addchild and removeChild DOM methods for Edge and Chrome

Below we are creating a JavaScript utility that fully supports the functionality of the DOM (like appendChild, removeChild, etc.) in Microsoft Edge and other modern browsers involves wrapping standard DOM

Read More

JavaScript method to remove child node

Create a JavaScript method that will take 2 parameters, first parameter will take complete XML as string and second will take XML node object which need to be removed from

Read More

Open a Fixed-Size Popup Without Minimize/Maximize Effects

Disabling the minimize and maximize buttons of a popup window is not directly supported in modern browsers, including Microsoft Edge, due to security and user-experience considerations. The window.open() function provides

Read More