ASPxCallback - Update Label Text on callback

I understand why I'm not seeing the label, but I looked at example E36 and tried to implement a similar approach without success.

This is my C# codebehind code:
        protected void cbInsertNewRecord_Callback(object source, CallbackEventArgs e)
        {
            string s = e.Parameter;
            // Split string on '|'.
            string[] pm = s.Split('|');

            // Get current logged in employee's ID again.
            GetEmployeeID();

            // Call method that calls SQL update proc.
            sMessage = AddNewTimeRecord(pm[0], empID, pm[2], pm[3], pm[4], pm[5], pm[6], pm[7], pm[8], pm[9], pm[10], pm[11], pm[12]);

            // Pass SQL Server message to e.Result so that the CallbackComplete event handler can pass it to popupcontrol label.
            e.Result = sMessage;
        }

As you can see I'm passing the returned message to e.Result. When I put a breakpoint at e.Result = sMessage, I do in fact see my message.

However, when I apply the following javascript code to the CallbackComplete eventhandler (see attached screenshot):

function(s, e) {
    document.getElementById('clientLabel').innerHTML = e.result;
}

Nothing appears on my popupcontrol in clientLabel!

What am I doing wrong?

Peter

If you wish to display a text in ASPxLabel, I recommend you initialize the ClientInstanceName property and use its value on the client side to get the control client-side instance. After that, call the ASPxClientLabel.SetText method to set the text.

When you say "initialize the ClientInstanceName property", do you mean give it a name via code? or via setting the property to a name. I've done the latter, that is I've given it a name already, which is 'clientLabel'.

Secondly, I've tried to assign the SQL message by using either EndCallback or CallbackComplete client-side eventhandlers. I'm using the following statement:

function(s, e) {
     clientLabel.SetText(e.Result);
}

Neither of them work!

Hello,

It is necessary to specify the control's ClientInstanceName property at either design or run time to be able to manipulate our control on the client side:
Client-Side Functionality
Please take a look at the E2379 - ASPxGridView - How to update an external control during a callback Code Central example that illustrates the recommended way for accomplishing this task:

<dx:ASPxLabel ... ClientInstanceName="clientLabel">
</dx:ASPxLabel>