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----  [求助]  (http://www.foxtable.com/bbs/dispbbs.asp?boardid=2&id=64794)
--  作者：yjd
--  发布时间：2015/3/2 10:36:00
--  [求助]
版主您好，我的代码是从XLS表中更新"联系人","座机","手机","地址"等列信息，但是我写的代码有些问题，我想实现只更新系统中的“联系人”列为空的行，同时XLS表中有的行而系统中没有的行不再新增。您看代码应该怎么写。谢谢

If User.IsRole("对公专区") Then
    \'审核代码
    If msgbox("对账数据导入会覆盖已更新的联系人信息,是否进行导入?",65,"提示") = 1 Then
        Dim Book As New XLS.Book("D:\\khdaxt\\drgx\\dz.xls")
        Dim Sheet As XLS.Sheet = Book.Sheets(0)
        Tables("对公客户明细").StopRedraw()
        Dim nms() As String = {"账号","户名","联系人","座机","手机","地址"}
        For n As Integer = 0 To Sheet.Rows.Count -1
            Dim bh As String = sheet(n,0).Text
            Dim dr As DataRow = DataTables("对公客户明细").Find("账号 = \'" & bh & "\'")
            If dr Is Nothing Then \'如果不存在同账号的行
                dr =  DataTables("对公客户明细").AddNew()
            End If
            For m As Integer = 0 To nms.Length -1
                dr(nms(m)) = trim(Sheet(n,m).Value)
            Next
        Next
        Tables("对公客户明细").ResumeRedraw()
        msgbox("对账数据导入完毕!",64,"提示")
    End If
Else
    MessageBox.Show("您无此权限!")
End If
--  作者：有点甜
--  发布时间：2015/3/2 10:38:00
--  
If User.IsRole("对公专区") Then
    \'审核代码
    If msgbox("对账数据导入会覆盖已更新的联系人信息,是否进行导入?",65,"提示") = 1 Then
        Dim Book As New XLS.Book("D:\\khdaxt\\drgx\\dz.xls")
        Dim Sheet As XLS.Sheet = Book.Sheets(0)
        Tables("对公客户明细").StopRedraw()
        Dim nms() As String = {"账号","户名","联系人","座机","手机","地址"}
        For n As Integer = 0 To Sheet.Rows.Count -1
            Dim bh As String = sheet(n,0).Text
            Dim dr As DataRow = DataTables("对公客户明细").Find("账号 = \'" & bh & "\' and 联系人 is null")
            If dr IsNot Nothing Then
                For m As Integer = 0 To nms.Length -1
                    dr(nms(m)) = trim(Sheet(n,m).Value)
                Next
            End If
        Next
        Tables("对公客户明细").ResumeRedraw()
        msgbox("对账数据导入完毕!",64,"提示")
    End If
Else
    MessageBox.Show("您无此权限!")
End If
--  作者：yjd
--  发布时间：2015/3/2 10:47:00
--  
谢谢，已解决！