主题：[求助]

以下代码有一个问题，如果“得分”列中没有成绩分数（比赛开始前“得分”列是没有分数的），执行任何一个操作都会出现错误提示，请问代码如何修改？

 

Dim da As DataTable = DataTables("学生团体总分")

Dim da_source As DataTable = DataTables("比赛得分")

da.DataRows.Clear

Dim dwa As List(Of String) = da_source.GetUniqueValues ("队别 <> '教工组'", "单位" )

For Each dw As String In dwa

    Dim ndr As DataRow = da.AddNew

    ndr("单位") = dw

    ndr("总分") = da_source.Compute("sum(得分)", "单位 = '" & dw & "'")

Next

 

 

Dim dra As List(Of DataRow) = da.Select("", "总分 desc")

dra(0)("名次") = 1

For i As Integer = 1 To dra.Count - 1

    If dra(i)("总分") = dra(i-1)("总分") Then

        dra(i)("名次") = dra(i-1)("名次")

    Else

        dra(i)("名次") = i+1

    End If

Next

 

Tables("学生团体总分").Sort = "名次"

 

 

Dim db As DataTable = DataTables("教工团体总分")

Dim db_source As DataTable = DataTables("比赛得分")

db.DataRows.Clear

Dim dwb As List(Of String) = db_source.GetUniqueValues ("队别 = '教工组'", "单位" )

For Each dw As String In dwb

    Dim ndb As DataRow = db.AddNew

    ndb("单位") = dw

    ndb("总分") = db_source.Compute("sum(得分)", "单位 = '" & dw & "'")

Next

 

 

Dim drb As List(Of DataRow) = db.Select("", "总分 desc")

drb(0)("名次") = 1

For i As Integer = 1 To drb.Count - 1

    If drb(i)("总分") = drb(i-1)("总分") Then

        drb(i)("名次") = drb(i-1)("名次")

    Else

        drb(i)("名次") = i+1

    End If

Next

 

Tables("教工团体总分").Sort = "名次"

此主题相关图片如下：截图02.jpg

请问代码放在什么位置合适？

提示错误：

谢谢甜老师！我会努力学习的，今后还需要多多指教。