<a href="https://bytes.com/topic/net/answers/741495-asp-net-detect-browser-closing">Asp .Net : Detect browser closing

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I am using a masterpage so using the javascript is a no go in the body tag (as far as I know) since I do not need it to fire on all pages.

I tried using something like this:

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 ClientScript.RegisterClientScriptBlock(this.GetType(), "onUnload", "javascript:alert();", true);
 

in the codebehind, but it fires as soon as the page is loaded. If you know how to get an unload event to fire from the codebehind please fill me in since nothing I have tried has worked... Here is one of the attempts:

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 protected void Page_Unload(object sender, EventArgs e)

    {

        ClientScript.RegisterClientScriptBlock(this.GetType(), "onUnload", "javascript:alert();", true);

    }

I do have a submit button, but I am curious to see what fields are left blank when they leave the page without hitting submit.

Nov 27 '07 #4

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Anyone have anymore ideas?

Nov 28 '07 #5

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I figured it out...

I put this in the codebehind:

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 HtmlGenericControl body = (HtmlGenericControl)Master.FindControl("mBody");

        body.Attributes.Add("onunload", "checker()");

This in the Masterpage body tag:

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<body id="mBody" runat="server">

and finally the function in the masterpage:

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 <script type="text/javascript">

    function checker()

    {

        alert("Working?");

    }

    </script>

Nov 29 '07 #6

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Well, I at least got a popup to come up, but I cannot get anything else to work on the js side. When I try to pull information from a textbox with document.getElementbyID('anything').value it gives me an error saying their are no properties.

I tried using:

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 protected void OnUnloader(object sender, EventArgs e)

{

    Response.Redirect("http://www.google.com");

//This is just for testing, if I can get this to fire I will put my own logic in to pull the values for fields that have data in them.

}

in the codebehind and

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OnUnload="OnUnloader()"

on the design page (attached to one of the textboxes), but I get this error - CS1501: No overload for method 'OnUnloader' takes '0' arguments

Does anyone have any ideas on how to get this to work? My goal is to obtain the information entered into the form when the submit button is not clicked. This will give me a better idea of what fields are left blank and more insight into problem areas that are causing clients not to finish the request form.

Dec 3 '07 #7

Capture event when browser is closing

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This is what I am trying to get to work now... The stored procedure fires and loads info to the DB, but it does it on page load not page unload. Any advice would be appreciated.

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 protected void Page_Init(object sender, EventArgs e)

    {

        this.Unload += new EventHandler(QuickQuote_Unload);

    }

 protected void QuickQuote_Unload(object sender, EventArgs e)

    {

      (Stored Procedure)

}

I tried using:

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 protected void Page_Unload(object sender, EventArgs e)

    {

        this.Unload += new EventHandler(QuickQuote_Unload);

    }

But nothing happend at all.

Dec 3 '07 #8

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