在生成“课时名单”设计中，希望“性质”列的值是“周六下午”改为“补课”，“周六晚上”改为“辅导”，“周日上午”改为“守班”，“周日下午”改为“补课”。如何对下列Tables("课时名单").Rows(i)("性质") = Values(1)中的Values(1)进行控制？原设计代码如下：
 

\'生成"课时名单"表

Dim s As Date = Date.Now()

Dim ksmd As New DataTableBuilder("课时名单")

ksmd.AddDef("姓名", GetType(String), 15)

ksmd.AddDef("性质", GetType(String), 15)

ksmd.AddDef("星期", GetType(String), 15)

ksmd.AddDef("计分", GetType(Integer))

ksmd.Build()

\'生成"课时名单"数据

Dim Values() As String

Dim n As Integer = Tables("补课").rows.count

Dim n1 As Integer

for Each dc as Datacol in DataTables("补课").Datacols

    if dc.name <> "班级" Then

        n1 = n1 +1

        dim f As New Filler

        f.SourceTable = DataTables("补课") \'指定数据来源

        f.SourceCols = dc.name \'指定数据来源列

        f.DataTable = DataTables("课时名单") \'指定数据接收表

        f.DataCols = "姓名" \'指定数据接收列

        f.ExcludeNullValue=true

        f.Distinct = false

        f.Fill() \'填充数据

        Values = dc.name.split("_")

        For i As integer = (n*n1)-n to Tables("课时名单").rows.count -1

            Tables("课时名单").Rows(i)("星期") = Values(0)

            Tables("课时名单").Rows(i)("性质") = Values(1)

            Tables("课时名单").Rows(i)("计分") = 1

        Next

    end if

Next

DataTables("课时名单").DeleteFor("[姓名] Is Null")

Messagebox.Show("处理完毕! 耗时: " & (Date.Now -s).TotalSeconds)
（注：不想生成“课时名单”后，再遍历替换）

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点击浏览该文件:管理项目1.table

感觉用 select case 比较好

\'生成"课时名单"表
Dim s As Date = Date.Now()
Dim ksmd As New DataTableBuilder("课时名单")
ksmd.AddDef("姓名", GetType(String), 15)
ksmd.AddDef("性质", GetType(String), 15)
ksmd.AddDef("星期", GetType(String), 15)
ksmd.AddDef("计分", GetType(Integer))
ksmd.Build()
\'生成"课时名单"数据
Dim Values() As String
Dim n As Integer = Tables("补课").rows.count
Dim n1 As Integer
for Each dc as Datacol in DataTables("补课").Datacols
    Dim T As Table = Tables("课时名单")
    if dc.name <> "班级" Then
        n1 = n1 +1
        dim f As New Filler
        f.SourceTable = DataTables("补课") \'指定数据来源
        f.SourceCols = dc.name \'指定数据来源列
        f.DataTable = DataTables("课时名单") \'指定数据接收表
        f.DataCols = "姓名" \'指定数据接收列
        f.ExcludeNullValue=true
        f.Distinct = false
        f.Fill() \'填充数据
        Values = dc.name.split("_")
        For i As integer = (n*n1)-n to T.rows.count -1
            T.Rows(i)("星期") = Values(0)
            Select Case Values(1)
                Case "周六下午","周日下午"
                    Values(1) = "补课"
                Case "周六晚上"
                    Values(1) = "辅导"
                Case "周日上午"
                    Values(1) = "守班"
            End Select
            T.Rows(i)("性质") = Values(1)
            T.Rows(i)("计分") = 1
        Next
    end if
Next
DataTables("课时名单").DeleteFor("[姓名] Is Null")
Messagebox.Show("处理完毕! 耗时: " & (Date.Now -s).TotalSeconds)

呵呵，我不认为是iif的问题，iif同样可以完成，如：

Values(1) = iif(Values(1)="周六下午","补课",iif(Values(1)= "周日下午","补课",iif(Values(1)="周六晚上","辅导",iif(Values(1)="周日上午","守班",Values(1)))))