主题：合并求和，删除多余行

删除重复，参考代码

Dim idx As String = "-1,"
Dim idx_temp As String = ""
Dim pdr As DataRow = Nothing
Dim count As Integer = 0
Dim cs As String = "第一列,第二列"
For Each dr As DataRow In DataTables("表A").Select("", cs)
    Dim flag As Boolean = False
    If pdr IsNot Nothing Then
        For Each c As String In cs.split(",")
            If pdr(c).replace(" ","") <> dr(c).replace(" ", "") Then
                flag = True
                Exit For
            End If
        Next
        If flag Then
            If count > 1 Then
                idx &= idx_temp
            End If
            count = 1
            idx_temp = ""
        Else
            count += 1
            idx_temp &= dr("_Identify") & ","
        End If
    Else
        count += 1
    End If
    pdr = dr
Next

If count > 1 Then
    idx &= idx_temp
End If

Tables("表A").Filter = "_Identify not In (" & idx.trim(",") & ")"

'DataTables("表A").DeleteFor("_Identify not In (" & idx.trim(",") & ")")

Dim idx As String = "-1,"
Dim idx_temp As String = ""
Dim pdr As DataRow = Nothing
Dim count As Integer = 0
Dim cs As String = "第一列,第二列"
Dim sum As Double = 0
Dim drs As List(Of DataRow) = DataTables("表A").Select("", cs)
Dim fdr As DataRow = drs(0)
For Each dr As DataRow In drs
    Dim flag As Boolean = False
    If pdr IsNot Nothing Then
        For Each c As String In cs.split(",")
            If pdr(c).replace(" ","") <> dr(c).replace(" ", "") Then
                flag = True
                Exit For
            End If
        Next
        If flag Then
            output.show(dr("第一列") & dr("第二列") & fdr("第一列") & fdr("第二列") & " " & sum)
            fdr("第六列") = sum
            If count > 1 Then
                idx &= idx_temp
            End If
            fdr = dr
            sum = 0
            count = 1
            idx_temp = ""
        Else
            count += 1
            idx_temp &= dr("_Identify") & ","
        End If
    Else
        count += 1
    End If
    sum += dr("第五列")
    pdr = dr
Next

If count > 1 Then
    idx &= idx_temp
End If

fdr("第六列") = sum

Tables("表A").Filter = "_Identify not In (" & idx.trim(",") & ")"

'DataTables("表A").DeleteFor("_Identify not In (" & idx.trim(",") & ")")