title: radcombobox getting populated two times with same records
body: <p>I am Using radcombobox in asp.net gridview.
  I have used ItemTemplate tag of radcombobox for putting a checkbox in it for multiple selection of records my mark up is</p>
  
  <pre><code>&lt;telerik:RadComboBox TabIndex="2" ID="rcbDept" runat="server" 
           EmptyMessage="--Select Department--"
           AllowCustomText="true" EnableScreenBoundaryDetection="false" 
           Width="100px" EnableTextSelection="false"
           Filter="Contains" Height="200" OnClientDropDownClosed="DropDownClosed"
           OnClientFocus="ClientFocus"&gt;
           &lt;ItemTemplate&gt;
               &lt;asp:CheckBox runat="server" ID="chk1" onclick="onCheckBoxClick(this)" 
                    Text='&lt;%# DataBinder.Eval(Container.DataItem, "dept_name") %&gt;' /&gt;
           &lt;/ItemTemplate&gt;
    &lt;/telerik:RadComboBox&gt;
  </code></pre>
  
  <p>I have used this in <code>EmptyDataTemplate</code> <code>EditTemplate</code> &amp; <code>FooterTemplate</code> of <code>Gridview</code>.</p>
  
  <p>I am populating the <code>Combobox</code> in <code>RowCreated</code> Event</p>
  
  <pre><code>protected void gv1_RowCreated(object sender, GridViewRowEventArgs e)
  {
       int a = 0;
       RadComboBox rcbDept1 = (RadComboBox)e.Row.FindControl("rcbDept");
       if (rcbDept1 != null)
       {
          if (rcbDept1.Items.Count == 0)
          {
             rcbDept1.DataSource = obj.FillRcbDepartment(a);
             rcbDept1.DataTextField = "dept_name";
             rcbDept1.DataValueField = "dept_cd";
             rcbDept1.DataBind();
          }
       }
    }
  </code></pre>
  
  <p>My problem is that if there are 5 record in department the it gets duplicated and <code>combobox</code> fills with 10 records. Where am I going wrong plz suggest.</p>