应该先声明添加了子项 再用TS添加.
Dim ts As new Windows.Forms.ToolStrip
Dim tsi As new Windows.Forms.ToolStripDropDownButton
Dim s As String
Dim drs As List(Of DataRow)
s = DataTables("表C").GetComboListString("第一列")
Dim Values() As String = s.Split("|")
For i As Integer = 0 To Values.Length -1
Dim tsi As new Windows.Forms.ToolStripDropDownButton(Values(i))
drs = DataTables("表C").Select("[第一列] = '" & Values(i) & "'")
For Each dr As DataRow In drs
tsi.DropDownItems.Add(dr("第二列")) 这一句通不过应该咋改?
Next
ts.Items.Add(tsi)
Next
e.Form.baseform.Controls.Add(ts)