_SortKey的定义 - 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!

Datacolchanged代码

If e.DataCol.Name = "日期" Then
    If e.DataRow.IsNull("日期") Then
        e.DataRow("编号") = Nothing
    Else
        Dim d As Date = e.DataRow("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,"yy-MM") '生成编号的前6位,4位年,2位月.
        If e.DataRow("编号").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(编号)","日期 >= #" & fd & "# And 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("编号") = bh & "-" & Format(idx,"000")
        End If
    End If
End If

If e.DataCol.Name = "日期" Then
    If e.NewValue Is Nothing Then
        e.DataRow("编号") = Nothing
        e.DataRow("银行账号") = Nothing
    End If
End If

Select Case e.DataCol.Name
    Case "日期","编号","收入","支出","余额","银行账号"
        Dim dr As DataRow
        Dim mr As DataRow = e.DataRow
        Dim drs As List(of DataRow)
        dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [银行账号] = '" & mr("银行账号") & "'", "[_SortKey] Desc")
        If dr Is Nothing Then
            mr("余额") = mr("收入") - mr("支出")+jcj
            dr = mr
        End If
        drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [银行账号] = '" & dr("银行账号") & "'", "[_SortKey]")
        For i As Integer = 1 To drs.Count - 1
            drs(i)("余额") = drs(i-1)("余额") + drs(i)("收入") - drs(i)("支出")
        Next
        If e.DataCol.Name = "银行账号" AndAlso e.OldValue IsNot Nothing AndAlso e.OldValue <> e.NewValue Then
            dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [银行账号] = '" & e.OldValue & "'", "[_SortKey] Desc")
            If dr Is Nothing Then
                dr = e.DataTable.Find("[银行账号] = '" & e.OldValue & "'", "[_SortKey]")
                If dr IsNot Nothing Then
                    dr("余额") = dr("收入") - dr("支出")+jcj
                End If
            End If
            If dr IsNot Nothing Then
                drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [银行账号] = '" & dr("银行账号") & "'", "[_SortKey]")
                For i As Integer = 1 To drs.Count - 1
                    drs(i)("余额") = drs(i-1)("余额") + drs(i)("收入") - drs(i)("支出")
                Next
            End If
        End If
End Select

DataTables("资金账").Save()

主题：_SortKey的定义