如果是主表,只能这样用Dim dt1 As DataTable = DataTable("主表名称")
如果是副本,只能这样用
Dim dt1 As DataTable = Tables(e.Form.Name & "_table2").DataTable
或者
Dim dt1 As DataTable = DataTable("主表名称")
如果是sqltable或者sqlquery,这样用
Dim dt1 As DataTable = Tables(e.Form.Name & "_table2").DataTable
Dim dt1 As DataTable = DataTables(e.Form.Name & "_table2")