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主题:[求助] 防止重复记录

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[求助] 防止重复记录  发帖心情 Post By:2019/8/30 23:16:00 [只看该作者]

 

 

你好,以下代码中可不可以帮忙加一个条件,如果表PrintHistory已经存在相同的PartNo,就不再新增该记录。谢谢。

 

 

Dim t1 As Table = Tables("生产任务单")
Dim nmb() As String = {"生产任务单号","产品名称","数量","PrintTime"}
Dim nma() As String = {"生产任务单号","PartNo","Qty","PrintTime"}

For r As Integer = t1.TopPosition To t1.BottomPosition
    Dim dr As Row = Tables("PrintHistory").AddNew
    For i As Integer = 0 To nma.Length - 1
        dr(nma(i)) = t1.rows(r)(nmb(i))
    Next
Next


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  发帖心情 Post By:2019/8/31 8:01:00 [只看该作者]

Dim t1 As Table = Tables("生产任务单")
Dim nmb() As String = {"生产任务单号","产品名称","数量","PrintTime"}
Dim nma() As String = {"生产任务单号","PartNo","Qty","PrintTime"}
For r As Integer = t1.TopPosition To t1.BottomPosition
    Dim r1 As Row = t1.rows(r)
    Dim dr As DataRow = DataTables("PrintHistory").Find("PartNo='" & r1("PartNo") & "'")
    If dr Is Nothing Then
        dr = DataTables("PrintHistory").AddNew
        For i As Integer = 0 To nma.Length - 1
            dr(nma(i)) = r1(nmb(i))
        Next
    End If
Next

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