If e.DataCol.name = "第一列" Then Dim pdr As DataRow = DataTables("表B").find("第二列 = '" & e.DataRow("第二列") & "'") If pdr IsNot Nothing Then Dim str As String = e.DataTable.GetComboListString("第一列", "第二列 = '" & e.DataRow("第二列") & "'") pdr("第三列") = str End If End If