Show Alert Message when browser is closed after Server Side checking

Question

I have to show alert on my web page after some server side validation(Based on certain condition to whether display alert or not) when browser cross is clicked and after the alert message the page should not be closed. I do everything from Codebehind. No single line of code in aspx page. Can anybody provide code snippet. I am using .net1.1.

what sort of validation you need to perform on browser closed? — muhammad kashif, Oct 17 '12 at 12:20
just capture the click event while closing the brower window. it will be a click event. so you can have : if(click event in browser window closes the window) alert("something"); — The Dark Knight, Oct 17 '12 at 12:20
There is a condition based on which i have to decide whether to show alert or not — F11, Oct 17 '12 at 12:31

score 1 · Answer 1 · answered Oct 17 '12 at 12:55

1

Use the below code..

ScriptManager.RegisterStartupScript(this, GetType(), "alert", "alert('sucessfully saved');",true);

answered Oct 17 '12 at 12:55

Kamal Deepak

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score 0 · Answer 2 · edited May 23 '17 at 12:06

Just add some Javascript to the page when you do the validation in CodeBehind.

Here´s described how to show a popup with JavaScript when the tab is closed. To add plain text (JavaScript in our case) to your HTML, you can use a LiteralControl.

Some Code:

        if (warningNecessary)
        {
            LiteralControl lc = new LiteralControl();
            lc.Text = string.Concat("<script type=\"text/javascript\">",
                                        "window.onUnLoad= function (evt) {",
                                        "alert('YourAlert');",
                                        "}",
                                    "</script>");
            this.Controls.Add(lc);
        }

how it will be called,i mean how to pass evt argument? – F11 Oct 18 '12 at 04:20 — F11, Oct 18 '12 at 04:20

score 0 · Answer 3 · answered Oct 18 '12 at 04:44

When I close the browser,i have to perofrm some server side functions.

if any exception comes in these server side function,i have to show an alert message that "Operation Unsuccessful" and in that case browser should not be closed.

else close the browser.

Show Alert Message when browser is closed after Server Side checking

3 Answers3