Execute different codes on ok and cancel of confir

Question

I have a textBox and I want to create a confirm message on text_changed event and execute different codes on ok and cancel in code behind under text_changed event

<asp:TextBox ID="TextBox1" runat="server"  ontextchanged="TextBox1_TextChanged"></asp:TextBox>

Answer 1

To achieve your functionality you have to do following

Make AutoPostBack="True" of your text box.

Add one hidden filed and add java script like following code example in aspx page.

Note: java script block must be come after you hidden field and text box control.

<asp:HiddenField ID="HiddenField1" runat="server" />
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" 
                ontextchanged="TextBox1_TextChanged" ></asp:TextBox>

<script type="text/javascript">

                var textChange = document.getElementById('<%= TextBox1.ClientID %>').getAttribute("onchange");

                document.getElementById('<%= TextBox1.ClientID %>').setAttribute("onchange", "JustConfirm();");

                function JustConfirm() {
                    var IsConfirm = confirm('Confirm event?');
                    var hdnctrl = document.getElementById('<%= HiddenField1.ClientID %>');
                    hdnctrl.value = IsConfirm ? 'yes' : 'no';
                    eval(textChange);
                }
</script>

Now in server side put code check as following

protected void TextBox1_TextChanged(object sender, EventArgs e)
        {
            if (HiddenField1.Value == "yes")
            {
                // Any c# code for confirmation
            }
            else
            {
                // Any c# code for not confirmation
            }
        }

Answer 2

window.confirm returns a boolean, in your button you could add onclick="trigger_confirmation"

var trigger_confirmation = function(){
    if(window.confirm("Are you sure blah blah blah?")){
        // user confirmed
    } else {
        // user declined
    }
}

Answer 3

try this code inside your TextBox1_TextChanged block:

 ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script>if(window.confirm('Press ok to continue?')){// on ok clicked  }</script>");