ASP.net - Button - Javascript Confirm dialog - execute SOME server-side code?

Question

I have a simple ASP.net page where users can edit information about themselves.

When \"Edit\" button is clicked, the form goes into edit mode and I display \"Save\"

Answer 1

There are several ways to do it but I am going to use asp:HiddenField. In javascript, after user confirms, let its result to be set in the hidden field. And in server side, you can access it like any other asp.net control.

So

your aspx:

   <asp:HiddenField ID="HiddenField1" runat="server" Value="" />

CodeBehind:

  protected void Page_Load(object sender, EventArgs e)

  {

      if (!Page.IsPostBack)
      {

        var result = HiddenField1.Value; 
      } 
  }

Javascript:

 //after confirm call this
 function SetValue(val)
 {
   document.getElementById('HiddenField1').value=val;
 }

Answer 2

Create a hidden field, and set the value of that field based on the result of the confirmation. You haven't shown the code/HTML for your button or form, but can you fit something like this into it:

<input type="hidden" id="sendEmail" name="sendEmail" value="" />

<input type="submit" value="Save" onclick="promptForEmail();" />

<script>
   function promptForEmail() {
      var result = Confirm("Send everybody an email?");
      // set a flag to be submitted - could be "Y"/"N" or "true"/"false"
      // or whatever suits
      document.getElementById("sendEmail").value = result ? "Y" : "N";
   }
</script>