Hi Edward,
You can use the following approach to achieve this requirement:
C#:
Hope this helps. Please give it a try and let me know about the result.
Regards,
Eyup
Telerik
You can use the following approach to achieve this requirement:
<telerik:RadComboBox ID="RadComboBox1" runat="server" OnDataBinding="RadComboBox1_DataBinding"></telerik:RadComboBox>protected void RadComboBox1_DataBinding(object sender, EventArgs e){ RadComboBox combo = (RadComboBox)sender; RadDataFormDataItem item = (RadDataFormDataItem)combo.NamingContainer; // acceess unique item ID string customerID = item.GetDataKeyValue("CustomerID").ToString(); // apply combo settings combo.DataTextField = "TextField"; combo.DataValueField = "ValueField"; // obtain and set the data source depending on the unique ID var dummySource = Enumerable.Range(1, 6).Select( x => new { ValueField = x, TextField = "C: " + customerID + ", Book: " + x }); combo.DataSource = dummySource; // select item if present combo.DataBound += (s, a) => { RadComboBoxItem comboItem = combo.FindItemByValue("3"); if (comboItem != null) { comboItem.Selected = true; } };}Hope this helps. Please give it a try and let me know about the result.
Regards,
Eyup
Telerik