Why my confirmation message did not fire from code behind?

Question

I have the following code

protected void Button1_Click(object sender, EventArgs e)
{
    string strScript = "if(confirm('Do you confirm?')){alert('OK'); }else{alert('cancel')}";
    Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Confirmation", strScript, true);

}
protected void Button2_Click(object sender, EventArgs e)
{
    string strScript = "if(confirm('Do you confirm?')){return false; }else{return true;}";
    Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Confirmation", strScript, true);

}

Button1 is displaying the confirmation message and then based on my selection respective alert message is appearing.

However when I click Button2 I do not even get the confirmation message.

Answer 1

That's because the code is wrong - you can't have return outside of a function, it's bad syntax.

You have to attach such code to something, for example to button click event:

Button2.OnClientClick = "return confirm('Do you confirm?');";

Have such code in the Page_Load event (or directly in the .aspx) and then clicking the button will trigger confirmation dialog that if cancelled, will cancel the button click.