Question

I have a JS Method as follows: ( I don’t know if it’s 100% correct)

<script Type="Text/Javascript">

if (confirm("Are you SUre ?")) {
  return true;
} else {
  return false;
}

</script>

And have some doubts:

First: I have a folder called JS and i’m planing to put it there, is this correct?

Second: I will use this on an Edit page, so when the customer clickon the button edit I’d like this confirmation with some message like "Are you Sure? and the buttons Yes/No
If the customer clicks on the Yes then i’ll keep with my edit on database.
So how do I do that ? How I call this method at the moment that the customer click on the ImageButton ?

One more thing: How Do I get the return of this method and work with it on my aspx.cs using C#?

I tried the code below, but didn’t work =\ it shows me the popUp but even when I click cancel it goes to the OnClick Method

<asp:ImageButton ID="Btn_Alterar" runat="server" ImageUrl="~/Imgs/btAlterar.jpg" OnClick="Btn_Alterar_Click" OnClientClick="confirm()" />

Answer 1

This should work. It will pop up the question and if they say yes then will process the server side code (as an example).

JS:

<script language="javascript">
<!--
function doConfirm() {
    if (confirm("Are you SUre ?")) {
      //Person has said Yes, do your thing. Next line will allow the server side code to be processed
      return true
    } else {
      //User said No, do nothing and leave next line so the function call exits. 
      return false
    }
}
-->
</script>

ASP.NET Control:

<asp:ImageButton id="bMyButton" runat="server" onClientClick="doConfirm()" OnClick="DoServerSideCode" />

.CS

protected void DoServerSideCode(object sender, EventArgs e)
{
    //This will be called if JS is disabled OR the user clicks Yes. If the user clicks No then this won't be called. You can do DB logix here.
}

Edit: (with thanks to @justnS)

Another implementation would be:

ASP.NET Control:

<asp:ImageButton id="bMyButton" runat="server" onClientClick="return confirm('Are you sure?')" OnClick="DoServerSideCode" />

The above is exactly the same as the previous implementation but takes less code and is done inline.