Dim Filter As String
For Each dc As DataCol In DataTables("表名").DataCols
If Filter > "" Then
Filter = Filter & " And "
End If
Filter = Filter & dc.Name & " Is Null"
Next
上列设计中有下列两处不懂,请老师解释一下,好吗?Filter = Filter & " And "Filter = Filter & dc.Name & " Is Null"