主题：多条件查询的问题

Dim Filter As String
With e.Form.Controls("cmbProduct")
If .Value IsNot Nothing Then
Filter = "客户 = '" & .Value & "'"
End If
End With
With e.Form.Controls("StartDate")
If .Value IsNot Nothing Then
If Filter >"" Then
Filter = Filter & " And "
End If
Filter = Filter & "日期 >= #" & .Value & "#"
End If
End With
With e.Form.Controls("EndDate")
If .Value IsNot Nothing Then
If Filter >"" Then
Filter = Filter & " And "
End If
Filter = Filter & "日期 <= #" & .Value & "#"
End If
End With
If Filter > "" Then
Tables("送货管理").Filter = Filter
End If