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hi
can any one help me to solve this? am binding data to dropdownlist.
 

html code
<telerik:RadComboBox ID="cmbEPS" runat="server" Height="22px" Width="200px">
                                    <ItemTemplate>
                                        <div onclick="StopPropagation(event)">
                                            <asp:TreeView ID="tvWBS" runat="server" NodeStyle-NodeSpacing="2px"
                                                ShowLines="true">
                                                <HoverNodeStyle CssClass="CustomNodeColor" />
                                                <SelectedNodeStyle BackColor="#5B5B5B" ForeColor="White" HorizontalPadding="3px" />
                                                <NodeStyle ForeColor="#000000" />
                                            </asp:TreeView>
                                        </div>
                                    </ItemTemplate>
                                </telerik:RadComboBox>
                                <asp:RequiredFieldValidator ID="rfvActivityGroup" runat="server" ControlToValidate="cmbActivityGroup"
                                    Display="None" ErrorMessage="Select EPS" SetFocusOnError="True" ValidationGroup="g"
                                    Visible="true"></asp:RequiredFieldValidator>
 

 
.......................................................................................................................................................................................................
in .cs
 
 RadComboBox cmbEPS = (RadComboBox)phDynamic.FindControl("cmbEPS");
        if (cmbEPS !=null)
        {            
 
                RadTreeView rtvEPS = (RadTreeView)cmbEPS.Items[0].FindControl("rtvEPS");//in this line am getting error..
           
 
thank you
Posted 27-Mar-13 21:22pm
ythisbug2.1K
Edited 27-Mar-13 21:52pm
v3

1 solution

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Solution 2

The only part of that instruction using an index is the Items collection. Which implies there are no Items to select from.
Check the size of the collection when you check for a null control, and before you access it.
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Comments
ythisbug at 29-Mar-13 2:04am
   
thank you
OriginalGriff at 29-Mar-13 4:34am
   
You're welcome!

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