按年编号那位大大帮我改改，去掉月改成：2019001 - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

If e.DataCol.Name = "请款日期" Then
    If e.DataRow.IsNull("请款日期") Then
        e.DataRow("请款单号") = Nothing
    Else
        Dim d As Date = e.DataRow("请款日期")
        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 ld As Date = New Date(y,m,Days) '获得该月的最后一天
        Dim bh As String = Format(d,"yyyyMM") '生成编号的前6位,4位年,2位月.
        If e.DataRow("请款单号").StartsWith(bh) = False '如果编号的前6位不符
            Dim max As String
            Dim idx As Integer
            max = e.DataTable.Compute("Max(请款单号)","请款日期 >= #" & fd & "# And 请款日期 <= #" & ld & "# 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(7,3)) + 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("请款单号") = bh & "-" & Format(idx,"000")
        End If
    End If

Dim bh As String = Format(d,"yyyy") '生成编号的前6位,4位年,2位月.

If e.DataCol.Name = "请款日期" Then
    If e.DataRow.IsNull("请款日期") Then
        e.DataRow("请款单号") = Nothing
    Else
        Dim d As Date = e.DataRow("请款日期")
        Dim y As Integer = d.Year

        Dim fd As Date = New Date(y,1,1) '获得该月的第一天
        Dim ld As Date = fd.addyears(1)
        Dim bh As String = Format(d,"yyyy") '生成编号的前6位,4位年,2位月.
        If e.DataRow("请款单号").StartsWith(bh) = False '如果编号的前6位不符
            Dim max As String
            Dim idx As Integer
            max = e.DataTable.Compute("Max(请款单号)","请款日期 >= #" & fd & "# And 请款日期 < #" & ld & "# 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("请款单号") = bh & "-" & Format(idx,"000")
        End If
    End If
End If

If e.DataCol.Name = "请款日期" Then

If e.DataRow.IsNull("请款日期") Then

e.DataRow("请款单号") = Nothing

Else

Dim d As Date = e.DataRow("请款日期")

Dim y As Integer = d.Year

Dim fd As Date = New Date(y,1,1) '获得该年的第一天

Dim ld As Date = fd.addyears(1)

Dim bh As String = Format(d,"yyyy") '生成编号的前4位年.

If e.DataRow("请款单号").StartsWith(bh) = False '如果编号的前4位不符

Dim max As String

Dim idx As Integer

max = e.DataTable.Compute("Max(请款单号)","请款日期 >= #" & fd & "# And 请款日期 < #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")) '取得该年的最大编号

If max > "" Then '如果存在最大编号

idx = CInt(max.Substring(4,3)) + 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("请款单号") = bh & Format(idx,"000")

End If

主题：按年编号那位大大帮我改改，去掉月改成：2019001