如何从不同的GridTemplateColumn Radcombobox OnSelectedIndexChanged事件中找到GridTemplateColumn中的RadComboBox

Question

我有两个GridTemplateColumn，每个都包含一个RadCombobox。当左组合框OnSelectedIndexChanged事件触发时，我需要根据左侧的新值重新填充右组合框。我不能以任何方式从事件中看到FindControl。

            <telerik:GridTemplateColumn HeaderText="CAKE Verticals" ItemStyle-Width="100px">
                <ItemTemplate>
                </ItemTemplate>
                <EditItemTemplate>
                    <telerik:RadComboBox runat="server" ID="RadComboBox_CakeVerticals"  EnableLoadOnDemand="True"
                        OnItemsRequested="RadComboBox_CakeVerticals_ItemsRequested" AutoPostBack="true"
                        HighlightTemplatedItems="true" Height="140px" Width="220px" DropDownWidth="420px"
                        OnSelectedIndexChanged="RadComboBox_CakeVerticals_OnSelectedIndexChangedHandler">
                    </telerik:RadComboBox>
                </EditItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridTemplateColumn UniqueName="CakeColumns" HeaderText="CakeColumns" ItemStyle-Width="100px">
                <ItemTemplate>
                </ItemTemplate>
                <EditItemTemplate>
                    <telerik:RadComboBox runat="server" ID="RadComboBox_CakeColumns" EnableLoadOnDemand="True"
                        OnItemsRequested="RadComboBox_CakeColumns_ItemsRequested" AutoPostBack="true"
                        HighlightTemplatedItems="true" Height="140px" Width="220px" DropDownWidth="420px"
                        OnSelectedIndexChanged="RadComboBox_CakeColumns_OnSelectedIndexChangedHandler">
                    </telerik:RadComboBox>
                </EditItemTemplate>
            </telerik:GridTemplateColumn>

和CS

protected void RadComboBox_CakeVerticals_OnSelectedIndexChangedHandler(object sender, RadComboBoxSelectedIndexChangedEventArgs e)
{
    RadComboBox combobox = (RadComboBox)RadGrid_Columns.FindControl("RadComboBox_CakeColumns");
    Session["verticalID"] = e.Value;

    RCB_CAKE_Columns_Populate(e.Value, combobox);

}

问题是组合框始终为空。

Answer 1

我解决了这个问题

    RadComboBox RCB_Verticals = sender as RadComboBox;

    GridDataItem item = (GridDataItem)RCB_Verticals.NamingContainer;

    RadComboBox combobox = (RadComboBox)item.FindControl("RadComboBox_CakeColumns");

只需遵循NamingContainer的层次结构，即行级别。