你改过头了，用了SQLCommand就没有必要sqlSｅlect了
Dim cmd As New SQLCommand
Dim dt As DataTable = DataTables("成绩")
cmd.c
cmd.CommandText = "SELｅCT * From {成绩}"
dt = cmd.ExecuteReader()
''Dim dt As DataTable = DataTables("成绩")
Dim Arys As List(Of String()) = dt.GetValues("考试名称|学校代码|年级代码")
For Each Ary As String() In Arys
Dim drs As List(Of DataRow) = dt.Sｅlect("[考试名称] = '" & ary(0) & "'And [学校代码] = '" & ary(1) & "'and [年级代码] ='" & ary(2) & "'", "折总 DESC")
For n As Integer = 0 To drs.Count - 1 '遍历所有行
If n > 0 AndAlso drs(n)("折总") = drs(n-1)("折总") Then '如果总分和上一行相同
drs(n)("校序") = drs(n-1)("校序") '则排名等于上一行
Else
drs(n)("校序") = n + 1 '设置排名
End If
Next
Next
Dim Arys1 As List(Of String()) = dt.GetValues("考试名称|学校代码|年级代码|班级")
For Each Ary1 As String() In Arys1
Dim drs As List(Of DataRow) = dt.Sｅlect("[考试名称] = '" & ary1(0) & "'And [学校代码] = '" & ary1(1) & "'and [年级代码] ='" & ary1(2) & "'And [班级] = '" & ary1(3) & "'", "折总 DESC")
For m As Integer = 0 To drs.Count - 1 '遍历所有行
If m > 0 AndAlso drs(m)("折总") = drs(m-1)("折总") Then '如果总分和上一行相同
drs(m)("班序") = drs(m-1)("班序") '则排名等于上一行
Else
drs(m)("班序") = m + 1 '设置排名
End If
Next
Next
dt.save()
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Post By：2016/11/29 15:03:00 [只看该作者]
