Dim r As Table = Tables("成绩表")
For i As Integer = 0 To  r.Rows.Count -1
    Dim Sum1 As Double = r.rows(i)("评委1")
    Dim Sum2 As Double = r.rows(i)("评委2")
    Dim Sum3 As Double = r.rows(i)("评委3")
    Dim Sum4 As Double = r.rows(i)("评委4")
    Dim Sum5 As Double = r.rows(i)("评委5")
    Dim Sum6 As Double = r.rows(i)("评委6")
    Dim Sum7 As Double = r.rows(i)("评委7")
    Dim Sum8 As Double = r.rows(i)("评委8")
    Dim Sum9 As Double = r.rows(i)("评委9")
    Dim Sum10 As Double = r.rows(i)("评委10")
    Dim Sum11 As Double = r.rows(i)("评委11")
    Dim Sum12 As Double = r.rows(i)("评委12")
    Dim Sum13 As Double = r.rows(i)("评委13")
    Dim Sum14 As Double = r.rows(i)("评委14")
    Dim Sum15 As Double = r.rows(i)("评委15")
    Dim Sum16 As Double = r.rows(i)("评委16")
    r.Rows(i)("最大") = Functions.Execute("最大值",sum1,sum2,sum3,sum4,sum5,sum6,sum7,sum8,sum9,sum10,sum11,sum12,sum13,sum14,sum15,sum16)
    r.Rows(i)("最小") = Functions.Execute("最小值",sum1,sum2,sum3,sum4,sum5,sum6,sum7,sum8,sum9,sum10,sum11,sum12,sum13,sum14,sum15,sum16)
Next
上述代码应放在那里，才搜索最大值、最小值，我现在用命令按钮才生效，我希望输入16个评委的数据后能用上述代码自动搜索？

Dim r As Table = Tables("成绩表")
For i As Integer = 0 To  r.Rows.Count -1
    Dim Names As New List(Of String)
    If r.rows(i).isnull("评委1") = False Then
        Names.Add("评委1")
    End If
    If r.rows(i).isnull("评委2") = False Then
        Names.Add("评委2")
    End If
    If r.rows(i).isnull("评委3") = False Then
        Names.Add("评委3")
    End If
    If r.rows(i).isnull("评委4") = False Then
        Names.Add("评委4")
    End If
    If r.rows(i).isnull("评委5") = False Then
        Names.Add("评委5")
    End If
    If r.rows(i).isnull("评委6") = False Then
        Names.Add("评委6")
    End If
    If r.rows(i).isnull("评委7") = False Then
        Names.Add("评委7")
    End If
    If r.rows(i).isnull("评委8") = False Then
        Names.Add("评委8")
    End If
    If r.rows(i).isnull("评委9") = False Then
        Names.Add("评委9")
    End If
    If r.rows(i).isnull("评委10") = False Then
        Names.Add("评委10")
    End If
    If r.rows(i).isnull("评委11") = False Then
        Names.Add("评委11")
    End If
    If r.rows(i).isnull("评委12") = False Then
        Names.Add("评委12")
    End If
    If r.rows(i).isnull("评委13") = False Then
        Names.Add("评委13")
    End If
    If r.rows(i).isnull("评委14") = False Then
        Names.Add("评委14")
    End If
    If r.rows(i).isnull("评委15") = False Then
        Names.Add("评委15")
    End If
    If r.rows(i).isnull("评委16") = False Then
        Names.Add("评委16")
    End If  

    r.Rows(i)("最大") = Functions.Execute("最大值",names)
    r.Rows(i)("最小") = Functions.Execute("最小值",names)
Next
上述代码出错？