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-- 专家坐堂 (http://foxtable.net/bbs/list.asp?boardid=2)
---- 求助：关于计算问题 (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=95152)
-- 发布时间：2017/1/11 15:54:00
-- 求助：关于计算问题
求助：关于计算问题
此主题相关图片如下：额度计算求教.png
额度等于固定额度+临时额度
余额=收入-支出
可用额度=额度-（收入+支出）
特么感觉我的可用额度是不对的 貌似计算方法不对
特么感觉我的可用额度是不对的 貌似计算方法不对
是不是应该是
第一条数据后可用额度是4400
那么第二条收入15597 那么可用额度应该是15597+4400 而不是4402
是不是我的思路出现了错误呢？
我是不是应该采用余额的代码写法来实现可用额度的计算呢？
当前表事件代码如下：
Select Case e.DataCol.Name
Case "固定额度","临时额度"
e.DataRow("额度")=e.DataRow("固定额度")+e.DataRow("临时额度")
Case "余额"
If e.DataRow("银行卡类别")="信用卡" Then
e.DataRow("可用额度")=e.DataRow("额度")-(e.DataRow("收入")+e.DataRow("支出"))
If e.DataRow("可用额度")<0 Then
MessageBox.Show("当前透支" & e.DataRow("可用额度") & "元")
End If
End If
Case "收入","支出","银行卡卡号","额度"
Dim drs As List(of DataRow)
Dim Filter As String
Filter = "[_SortKey] >= " & e.DataRow("_SortKey") & "And [银行卡卡号] = \'" & e.DataRow("银行卡卡号") & "\'"
drs = e.DataTable.Select(Filter)
For Each dr As DataRow In drs
Filter = "[_SortKey] <= " & dr("_SortKey") & " And [银行卡卡号] = \'" & e.DataRow("银行卡卡号") & "\'"
Dim Val1 As Double = e.DataTable.Compute("Sum(收入)",Filter)
Dim Val2 As Double = e.DataTable.Compute("Sum(支出)",Filter)
dr("余额") = Val1 - Val2
Next
If e.DataCol.Name = "银行卡卡号" AndAlso e.OldValue IsNot Nothing AndAlso e.OldValue <> e.NewValue Then
Filter = "[_SortKey] > " & e.DataRow("_SortKey") & " And [银行卡卡号] = \'" & e.OldValue & "\'"
drs = e.DataTable.Select(Filter)
For Each dr As DataRow In drs
Filter = "[_SortKey] <= " & dr("_SortKey") & " And [银行卡卡号]= \'" & e.DataRow("银行卡卡号") & "\'"
Dim Val1 As Double = e.DataTable.Compute("Sum(收入)",Filter)
Dim Val2 As Double = e.DataTable.Compute("Sum(支出)",Filter)
dr("余额") = Val1 - Val2
Next
End If
End Select
烦请老师们多多指正，谢谢！
[此贴子已经被作者于2017/1/11 16:03:44编辑过]
-- 发布时间：2017/1/11 16:03:00
--
1、先计算得出余额
2、 可用额度，不就是等于 额度+余额 么？余额不是计算了收入和支出了么？
-- 发布时间：2017/1/11 16:09:00
-- 回复：（有点色）?1、先计算得出余额?&...
谢谢有点色老师 已经解决了
采用了下列代码：
Select Case e.DataCol.Name
Case "固定额度","临时额度"
e.DataRow("额度")=e.DataRow("固定额度")+e.DataRow("临时额度")
Case "余额"
If e.DataRow("银行卡类别")="信用卡" Then
If e.DataRow("可用额度")<0 Then
MessageBox.Show("当前透支" & e.DataRow("可用额度") & "元")
End If
End If
Case "收入","支出","银行卡卡号","额度"
Select Case e.DataCol.Name
Case "银行卡卡号","收入","支出"
Dim dr As DataRow
Dim mr As DataRow = e.DataRow
Dim drs As List(of DataRow)
dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [银行卡卡号] = \'" & mr("银行卡卡号") & "\'", "[_SortKey] Desc")
If dr Is Nothing Then
mr("余额") = mr("收入") - mr("支出")
mr("可用额度") = mr("额度")+(mr("收入") - mr("支出"))
dr = mr
End If
drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [银行卡卡号] = \'" & dr("银行卡卡号") & "\'", "[_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")
drs(i)("可用额度") = drs(i-1)("可用额度") + drs(i)("收入") - drs(i)("支出")
Next
If e.DataCol.Name = "银行卡卡号" AndAlso e.OldValue IsNot Nothing AndAlso e.OldValue <> e.NewValue Then
dr = e.DataTable.Find("[_SortKey] < " & mr("_SortKey") & " And [银行卡卡号] = \'" & e.OldValue & "\'", "[_SortKey] Desc")
If dr Is Nothing Then
dr = e.DataTable.Find("[银行卡卡号] = \'" & e.OldValue & "\'", "[_SortKey]")
If dr IsNot Nothing Then
dr("余额") = dr("收入") - dr("支出")
End If
End If
If dr IsNot Nothing Then
drs = e.DataTable.Select("[_SortKey] >= " & dr("_SortKey") & " And [银行卡卡号] = \'" & dr("银行卡卡号") & "\'", "[_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")
drs(i)("可用额度") = drs(i-1)("可用额度") + drs(i)("收入") - drs(i)("支出")
Next
End If
End If
End Select
End Select
[此贴子已经被作者于2017/1/11 16:34:41编辑过]