telerik:RadGrid 表格中删除数据

<telerik:RadGrid OnItemCommand="RadGrid1_ItemCommand" AutoGenerateColumns="False" ID="RadGrid1" runat="server" CellSpacing="0"
                            Height="490px" Culture="zh-CN" CssClass="gridTable" GridLines="Both" AllowPaging="True"
                            AllowSorting="true" PageSize="50" OnNeedDataSource="RadGrid1_NeedDataSource" HeaderStyle-HorizontalAlign="Center">
                            <ExportSettings HideStructureColumns="true" ExportOnlyData="true" IgnorePaging="true"
                                OpenInNewWindow="true" />
                            <PagerStyle Mode="NextPrevAndNumeric" AlwaysVisible="True" />
                            <ClientSettings EnableRowHoverStyle="true" AllowColumnsReorder="true" ReorderColumnsOnClient="true">
                                <Resizing AllowColumnResize="True" EnableRealTimeResize="True" />
                                <Scrolling AllowScroll="true" UseStaticHeaders="true" />
                                <Selecting AllowRowSelect="True" />
                            </ClientSettings>
                            <MasterTableView Width="100%" ClientDataKeyNames="编号" DataKeyNames="编号"
                                CommandItemDisplay="Top" EditMode="InPlace" >
                                <Columns>
                                    <telerik:GridTemplateColumn HeaderText="序号" ItemStyle-HorizontalAlign="Center">
                                        <ItemTemplate>
                                            <%#Container.ItemIndex + 1%>
                                        </ItemTemplate>
                                        <HeaderStyle Width="40" />
                                    </telerik:GridTemplateColumn>
                                    <telerik:GridTemplateColumn HeaderText="描述" >
                                        <ItemTemplate>
                                            <%# Eval("描述")%>
                                        </ItemTemplate>
                                        <HeaderStyle Width="150"></HeaderStyle>
                                        <EditItemTemplate>
                                            <telerik:RadTextBox ID="描述" Width="100%" runat="server" Text=' <%# Eval("描述")%>'></telerik:RadTextBox>
                                        </EditItemTemplate>
                                    </telerik:GridTemplateColumn>                           
                                    <telerik:GridTemplateColumn HeaderText="内容" ItemStyle-HorizontalAlign="Center">
                                        <ItemTemplate>
                                            <%# Eval("内容")%>
                                        </ItemTemplate>
                                        <HeaderStyle Width="50"></HeaderStyle>
                                        <EditItemTemplate>
                                            <telerik:RadTextBox ID="内容"  Width="100%" runat="server" Text=' <%# Eval("内容")%>' ></telerik:RadTextBox>
                                        </EditItemTemplate>
                                    </telerik:GridTemplateColumn>                                
                                    <telerik:GridEditCommandColumn HeaderStyle-Width="6%" UniqueName="Edit" EditText="编辑" HeaderText="编辑" ItemStyle-HorizontalAlign="Center">
                                    </telerik:GridEditCommandColumn>

<telerik:GridButtonColumn ButtonType="ImageButton" CommandName="Delete" ConfirmText="确认要删除吗？" UniqueName="DeleteColumn"
ConfirmDialogType="Classic" HeaderText="删除" Text="删除" HeaderStyle-Width="5%"
ItemStyle-HorizontalAlign="Center" ImageUrl="../Skins/Ibm/Content/icons/Delete.gif">
</telerik:GridButtonColumn>

                                </Columns>
                            </MasterTableView>
                        </telerik:RadGrid>

 protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
    {
        try
        {
            GridEditableItem item = e.Item as GridEditableItem;
            if (e.CommandName == "Delete")
            {
                string 编号 = item.GetDataKeyValue("编号").ToString();
                 // 根据编号查询数据 
                //得到这些数据之后  进行相应的方法处理 进行修改数据
        }
        }
        catch (Exception Exc)
        {
            throw;
        }
    }