If e.DataCol.Name = "日期" Then If e.DataRow.IsNull("日期") Then e.DataRow("编号") = Nothing Else Dim bh As String = "YP" & Format(e.DataRow("日期"),"yyyyMMdd") If e.DataRow("编号").StartsWith(bh) = False Dim max As String Dim idx As Integer max = e.DataTable.Compute("Max(编号)","日期 = #" & e.DataRow("日期") & "#") If max > "" Then '如果存在最大编号 idx = CInt(max.Substring(11,3)) + 1 Else idx = 1 End If e.DataRow("编号") = bh & "-" & Format(idx,"000") End If End If End If
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