主题：帮忙解释一下

Dim drs As List(Of DataRow) = DataTables("标录明细").Select("[有效评标价] > 0 And [项目名称] = '半山单元高中(暂名) 监理'", "有效评标价 DESC")

Dim n As Integer = Round2(drs.Count * 0.1,0)

 

If drs.Count >= n *2 Then

    '▂▂▂▂▂▂▂ 去除极端值 ▂▂▂▂▂▂▂

    drs.RemoveRange(0, n) '直接移除区间

    drs.RemoveRange(drs.Count - n, n)

   

    '▂▂▂▂▂▂▂ 计算平均值 ▂▂▂▂▂▂▂

    Dim sum As Double = 0

    For Each dr As DataRow In drs

        sum += dr("有效评标价")

    Next

    Dim avg As Double = sum / drs.Count

    avg = avg * 0.98   ‘下浮系数2%

    msgbox(avg)

    '▂▂▂▂▂▂▂ 集合方式筛选 ▂▂▂▂▂▂▂

    Dim diffDict As New Dictionary(Of DataRow, Double)

    For Each dr As DataRow In drs

        diffDict(dr) = Math.Abs(dr("有效评标价") - avg)

    Next

   

    Dim entryList As New List(Of KeyValuePair(Of DataRow, Double))(diffDict)

    entryList.Sort(Function(x, y) x.Value.CompareTo(y.Value))

   

    '▂▂▂▂▂▂▂ 生成结果表 ▂▂▂▂▂▂▂

    For i As Integer = 0 To Math.Min(14, entryList.Count - 1)

        Dim drSource = entryList(i).Key

       

        Output.Show(drSource("投标单位") & "=" & drSource("有效评标价"))

    Next

    MessageBox.Show("处理完成,平均值:{avg:N2}")

Else

    MessageBox.Show("有效数据不足")

End If