如何从RadTreeList UpdateCommand中查找DataKeyValue？

Question

当我进行更新时，我到底如何找到DataKey？我什么都试过了。

Private Sub rtlAccounts_UpdateCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.TreeListCommandEventArgs) Handles rtlAccounts.UpdateCommand
    Dim txtAccountDescription As RadTextBox = TryCast(e.Item.FindControl("txtAccountDescription"), RadTextBox)
    Dim txtAdminName As RadTextBox = TryCast(e.Item.FindControl("txtAdminName"), RadTextBox)
    Dim txtAdminEmail As RadTextBox = TryCast(e.Item.FindControl("txtAdminEmail"), RadTextBox)
    Dim rcbStatus As RadComboBox = TryCast(e.Item.FindControl("rcbStatus"), RadComboBox)
    Dim rntDocRetention As RadNumericTextBox = TryCast(e.Item.FindControl("rntDocRetention"), RadNumericTextBox)

    Dim item As TreeListEditableItem = TryCast(e.Item, TreeListEditableItem)
    Dim MyDataKeyID As String =  'Now what???
End Sub

我也想知道如何从InsertCommand和UpdateCommand中找到ParentDataKeyValue。

Answer 1

要获取DataKeyValue和ParentDataKeyValue，请将最后两行更改为以下内容：

Dim editedItem As TreeListEditFormItem = CType(e.Item, TreeListEditFormItem)
Dim dataKeyValue As String = _
    editedItem.ParentItem.GetDataKeyValue("EmployeeID").ToString()
Dim parentDataKeyValue As String = _
    editedItem.ParentItem.GetParentDataKeyValue("ReportsTo").ToString()

根据Telerik's documentation，如果使用的是InPlace编辑模式，则应将TreeListEditableItem转换为TreeListDataItem；如果使用的是EditForms，则应将TreeListEditableItem转换为TreeListEditFormItem。

为了使GetDataKeyValue和GetParentDataKeyValue返回所需的值，您必须在定义RadTreeList时在相应的DataKeyNames和ParentDataKeyNames值中设置它们：

<telerik:RadTreeList ID="EmployeeTreeList" runat="server" 
    DataKeyNames="EmployeeID" 
    ParentDataKeyNames="ReportsTo">
    <Columns>
        <%-- Add column definitions here --%>
    </Columns>
</telerik:RadTreeList>