主题：loadfilte 几个条件同时加载出错

各位老师好，用loadfilte 根据用户输入的条件进行加载，有几个条件同时加载，我下面这样写，出错，不知道是什么原因：

Dim Filter As String

With e.Form.Controls("门店编号")
    If .Value IsNot Nothing Then
        Filter = "归属门店代号 = '" & .Value & "' and "
    End If
End With

With e.Form.Controls("回访人")
    If .Value IsNot Nothing Then
        Filter+ = "回访人 = '" & .Value & "' and "
    End If
End With

With e.Form.Controls("销售主管")
    If .Value IsNot Nothing Then
        Filter+ = "销售主管 = '" & .Value & "'  "
    End If
End With

If Filter > "" Then
    DataTables("rjsytVIP回访记录").LoadFilter = Filter
MessageBox.Show(Filter)

    DataTables("rjsytVIP回访记录").Load
End If

调试提示：

---------------------------

---------------------------
归属门店代号 = 'R0039' and
---------------------------
确定  
---------------------------

 改一下

Dim Filter As String = "1=1"

With e.Form.Controls("门店编号")
    If .Value IsNot Nothing Then
        Filter = " and 归属门店代号 = '" & .Value & "'"
    End If
End With

With e.Form.Controls("回访人")
    If .Value IsNot Nothing Then
        Filter+ = " and 回访人 = '" & .Value & "'"
    End If
End With

With e.Form.Controls("销售主管")
    If .Value IsNot Nothing Then
        Filter+ = " and 销售主管 = '" & .Value & "'  "
    End If
End With

If Filter > "" Then
    DataTables("rjsytVIP回访记录").LoadFilter = Filter
MessageBox.Show(Filter)

    DataTables("rjsytVIP回访记录").Load
End If