主题：代码不执行

filter=filter & "未还 =false or 未还 is null"

改成

filter=filter & "(未还 =false or 未还 is null)"

你加上代码 msgbox(filter) 看弹出什么。

Dim nms() As String = {"产品型号","领取人","检具代码", "领取日期" ,"返回日期"}
Dim sps() As String = {"'","'","'","#","#"}
Dim bjf() As String = {"=","=","=",">=","<="}
Dim fds() As String = {"产品型号","领取人","检具代码","日期","日期"}
Dim Filter As String
For i As Integer = 0 To nms.Length - 1
    If e.Form.Controls(nms(i)).value IsNot Nothing Then
        If filter > "" Then
            filter = filter & " and "
        End If
        filter =filter & fds(i) & bjf(i) & sps(i) & e.Form.Controls(nms(i)).value & sps(i)
    End  If
Next
If e.Form.Controls( "已还").checked = True
    If filter > "" Then
        filter = filter & " and "
    End If
    filter=filter & " 已还=true"End If
If e.Form.Controls( "未还").checked = True
    If filter > "" Then
        filter = filter & " and "
    End If
    filter=filter & " (未还 =false or 未还 is null)"

End If

    msgbox(filter)

Tables("检具明细表").filter = filter