Onload event not firing alert box

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Hi I have page which has only gridveiw components. I wanted send a alert message to the user before he navigates to any other link. That is during the page unload below is my code. However the page navigates to the corresponding page but user is not prompted with alert message.

C#

protected override void OnUnload(EventArgs e)
{
    base.OnUnload(e);

    ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Have you saved everything');window.open ('TestScriptPages.aspx');", true);

}

Posted 2-Jan-14 20:42pm

ShaHam11

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dharam1 · Answer 1 · 2014-01-02T22:25:00

Solution 2

use window.onbeforeunload

ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "window.onbeforeunload = function () {if(confirm('Have you saved everything')){window.open ('TestScriptPages.aspx');}}", true);

Posted 2-Jan-14 22:25pm

dharam1

BK 4 code · Answer 2 · 2014-01-02T20:47:00

Solution 1

Hi instead of using alert use confirm it will ask your answer ok/cancel.

Just try this following code

JavaScript

ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "if(confirm('Have you saved everything')){window.open ('TestScriptPages.aspx');}", true);

Posted 2-Jan-14 20:47pm

BK 4 code

Updated 2-Jan-14 20:49pm

v2

Comments

ShaHam11 3-Jan-14 3:46am

No luck its not working the alert message or confirm message is not prompted

ShaHam11 3-Jan-14 4:00am

Actually if i just paste the above code under page load event the alert message is prompted I wanted this message to prompt, during page unload or when url changes