主题：保存时自动生成编号

窗口1有个Table1绑定“纯净水领用”，新增行时不生成“领水编号”，保存时生成“领水编号”，如果新增多行时才保存，求老师指教，谢谢！

Dim ary() As String = Functions.Execute("Xueqi")
Dim r As Row = Tables("纯净水领用").Current
If r.DataRow.RowState = DataRowState.Added Then
    Dim max As String
    max = DataTables("纯净水领用").SQLCompute("Max(领水编号)","领水编号 Like '" & ary(1) & "-" & "%'")
    If max = "" Then
        r("领水编号") = ary(1) & "-" & "001"
    Else
        Dim v As Integer = max.SubString(7,3)
        r("领水编号") = ary(1) & "-" & format(v +1,"000")
    End If
    DataTables("纯净水领用").Save()
End If

老师还想问个问题，如果有空值，鼠标进入空值行

Dim kjmc() As String = "日期,班级处室,领水桶数,退水桶数,还桶数,破桶数,领送人,收发人".Split(",")
For Each r As Row In Tables("纯净水领用").Rows
    For i As Integer = 0 To kjmc.Length - 1
        If r.IsNull(kjmc(i)) Then
            MessageBox.Show("【"& kjmc(i)&"】有空值,请检查")
             r(kjmc(i)).鼠标选中行

            Return
        End If
    Next
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