Hi all,

I use webdatagrid's sort feature, and one column is TemplateDataField, when I try sort this column, error happened.

the code is as following

 <ig:WebDataGrid ID="WebDataGrid2" DataSourceID="ObjectDataSource1"
            runat="server" EnableAjax="true" Height="400px" Width="825px" AutoGenerateColumns="False"
            DataKeyFields="Client_id">
            <Columns>
               <ig:TemplateDataField Key="DeleteItm" Width="60px">
                            <ItemTemplate>
                                <asp:ImageButton runat="server" ID="DeleteItem" AlternateText="<%$ Resources:ChineseLanguage, Client  %>" ImageUrl="../../images/WebDataGrid/DeleteIcon.PNG" OnClientClick="DeleteRow(); return false;" />
                            </ItemTemplate>
                        </ig:TemplateDataField>
                <ig:BoundDataField DataFieldName="Client_id" Key="Client_id">
                  
                    <Header Text="<%$ Resources:ChineseLanguage, Client_id  %>" />
                </ig:BoundDataField>
                <ig:BoundDataField DataFieldName="Client" Key="Client">
                    <Header Text="<%$ Resources:ChineseLanguage, Client  %>" />
                </ig:BoundDataField>
                <ig:BoundDataField DataFieldName="Client_e" Key="Client_e">
                    <Header Text="<%$ Resources:ChineseLanguage, Client_e  %>" />
                </ig:BoundDataField>
            </Columns>
            <EditorProviders>
                 <ig:TextBoxProvider ID="TextBoxProvider" />
            </EditorProviders>     
            <Templates >
                <asp:Label ID="aa" Text="bbb" runat="server"></asp:Label>
            </Templates>
            <Behaviors>
                <ig:Activation />
                    <ig:Selection RowSelectType="Multiple" CellClickAction="Row" />
                    <ig:EditingCore>
                        <Behaviors>
                            <ig:CellEditing Enabled="true" >
                                <EditModeActions EnableF2="true" EnableOnActive="true" MouseClick="Single" />
                                <ColumnSettings>
                                    <ig:EditingColumnSetting ColumnKey="ClientID" ReadOnly="true" />
                                </ColumnSettings>                              
                            </ig:CellEditing>
                            <ig:RowDeleting Enabled="true" />
                            <ig:RowAdding  EditModeActions-EnableOnActive="true" EditModeActions-MouseClick="Single" Enabled="true" />
                        </Behaviors>
                    </ig:EditingCore>
                    <ig:Paging PagerAppearance="Bottom" PageSize="10" Enabled="true" />                   
                     <ig:RowSelectors Enabled="true" RowNumbering="true"  />
                    <ig:Sorting SortingMode="Single" Enabled="true" />
                    <ig:Filtering Alignment="Top" Visibility="Visible" Enabled="true" AnimationEnabled="true" />
                   

            </Behaviors>
            <EditorProviders>
                <ig:WebTextEditProvider ID="WebTextEditProvider2" />
            </EditorProviders>
        
        </ig:WebDataGrid>