DataRowAdding
'网络编号
Static Index As Integer = 99999
e.DataRow("合同ID") = "CG" & Format(Date.Today(), "yyMM") & "-" & Index
Index = Index - 1
AfterSaveDataRow
''网络编号
Dim dr As DataRow = e.DataRow
Dim pf As String
If dr.RowState <> DataRowState.Added Then '如果不是新增行
Return '那么返回
ElseIf dr.IsNull("登记日期") Then '如果没有输入日期
e.Cancel = True '取消保存此行
MessageBox.Show("必须输入日期!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
Return
Else
pf = Format(dr("登记日期"), "yyMM") '否则获得编号的前缀,两位年,两位月
End If
Dim cmd1 As New SQLCommand
Dim cmd2 As New SQLCommand
Dim Key As Integer
Dim nm As String = e.DataTable.name
cmd1.C '设置数据源名称
cmd2.C
cmd1.commandText = "Selec t Count(*) From [网络编号] Where [前缀] = '" & pf & "' And 表名 = '" & nm & "'"
If cmd1.ExecuteScalar = 0 Then '如果编号表不存在前缀的行,那么增加一行
cmd1.commandtext = "Inser t Into 网络编号 (表名, 前缀, 顺序号) Values('" & nm & "','" & pf & "',1)"
cmd1.ExecuteNonQuery
End If
cmd1.commandText = "Selec t [顺序号] From [网络编号] Where [前缀] = '" & pf & "' And 表名 = '" & nm & "'"
Do
Key = cmd1.ExecuteScalar() '从后台获得顺序号
cmd2.commandText = "U pdate [网络编号] Set [顺序号] = " & (Key + 1) & " Where [顺序号] = " & Key & " And [前缀] = '" & pf & "' And 表名 = '" & nm & "'"
If cmd2.ExecuteNonQuery() > 0 Then '更新顺序号
Exit Do '更新成功则退出循环
End If
Loo p
e.DataRow("合同ID") ="CG" & pf & "-" & Format(Key, "0000")

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