主题：双击节点后报错

窗口事项内
e.Form.Controls("TreeView1").BuildTree("A", "报岗类型|报岗站")
双击节点后执行
Dim Filter As String
If e.node.Text = "加载所有数据" Then
    Filter = ""
Else
    Dim dr As DataRow = e.Node.DataRow '获取生成此节点的DataRow
    Select Case e.Node.Level
        Case 0
            Filter ="[报岗类型] = '" & dr("报岗类型") & "'"
        Case 1
            Filter ="[报岗类型] = '" & dr("报岗类型") & "' And [报岗站] = '" & dr("报岗站") & "'"
    End Select
End If
DataTables("A").LoadFilter = Filter
DataTables("A").Load()

表A 是个查询表

在双击节点时提示
此行已从表中移除并且没有任何数据。BeginEdit() 将允许在此行中创建新数据