Textbox.Text has incorrect value in codebehind

[Mych]

Hi, I have a page with several textboxes and comboboxes which all seem to work fine. The issue I have is with one textbox tb_Service and a combobox cmb_Service. What I have is tb_Service is a readonly textbox with a button (but_Modify). When the button is clicked a div is made visible revealing cmb_Services and two buttons to add or delete services. So when the user clicks modify, they select a service from the combobox and click add or delete buttons. These buttons have clientside java which will add or delete the service from tb_Services.
The code for the add is...

function butServiceAddClick() {
            var ServiceSelected = $('#cmbx_Service').val().toUpperCase();
            if (ServiceSelected == "PLEASE SELECT...") {
                //No Service selected so do nothing and exit
                return true;
            } else {
                var tb = $('#tb_Services');
                var oldvalue = tb.val().toUpperCase();
                var ServiceList = oldvalue + ";";
                if (/ServiceSelected + ";"/i.test(ServiceList)) {
                    //The selected Service is already in the list
                    //Do nothing and exit
                    return true;
                } else {
                    var newtext = "";
                    if (ServiceList == ";") {
                        newtext = ServiceSelected;
                    } else {
                        newtext = ServiceList + " " + ServiceSelected;
                    }
                    tb.val(newtext);
                    registerChange(tb, oldvalue, newtext);
                }
            }
        }

The code for deleting is similar and both codes work fine. In a test I added two sevices and ended up with tb_Services displaying SERVICE A; SERVICE B

I have another button which does a save. This is done in the code behind. When I look at what tb_Services.Text equates to at a breakpoint it is an empty string which is its value when the page was first populated. If I go to a record which already has a Service and add another the textbox displays correctly but once again when I click the save button and check the value of tb_Services is only has the original service and not the one I added. What am I doing wrong?

[Vasil]

Hi Mych,

If you use RadTextBox you have to use it's client side API to get the real value.
http://www.telerik.com/help/aspnet-ajax/input-client-side-radtextbox.html

For example: var value = $find("tb_Services").get_value();
If you want to get the text directly from the input, you can still do this, but it will work the same as with regular Asp:TextBox. So you can test your project with Asp:TextBox to see if the problem is in the RadTextBox or in something else.

Regards,
Vasil
Telerik