内部表。access日期使用#号
''生成合同编码
If e.DataCol.Name = "合同送审日期" Then
If e.DataRow.IsNull("合同送审日期") Then
e.DataRow("合同编码") = Nothing
Else
Dim d As Date = e.DataRow("合同送审日期")
Dim y As Integer = d.Year
Dim m As Integer = d.Month
Dim Days As Integer = Date.DaysInMonth(y,m)
Dim fd As Date = New Date(y,m,1) '获得该月的第一天
Dim bh As String = Format(d,"yyyyMM") '生成编号的前6位,4位年,2位月.
Dim max As String
Dim idx As Integer
max = e.DataTable.sqlCompute("Max(合同编码)","合同送审日期 >= #" & fd & "# And 合同送审日期 <= #" & d & "# And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大编号
If max > "" Then '如果存在最大编号
idx = CInt(max.Substring(bh.length+1,3)) + 1 '获得最大编号的后三位顺序号,并加1
Else
idx = 1 '否则顺序号等于1
End If
e.DataRow("合同编码") = bh & "-" & Format(idx,"000")
For Each dr As DataRow In e.DataTable.sqlSelect("合同送审日期 > #" & d & "# And 合同送审日期 < #" & fd.AddMonths(1) & "#")
idx += 1
dr("合同编码") = bh & "-" & Format(idx,"000")
dr.save
Next
End If
e.DataRow.Save
End If