帮忙看看这个，很基础
“+++”显示了，“222”也显示了，就是username值没显示，sql是没问题的，有返回值

Sub Page_Load(obj As object,e As eventargs)
Dim queryString As String = "SELECT DISTINCT username FROM tb_users where userid = 2882 "

Using connection As New OdbcConnection( "DSN=...... ")
Dim command As New OdbcCommand(queryString, connection)
connection.Open()
Dim reader As OdbcDataReader = command.ExecuteReader()
response.write( "+++ ")
While reader.Read()
response.write( "222 ")
Console.WriteLine( ", " & reader.GetString(0))
Console.WriteLine( "CustomerID={0} ", reader(0).ToString)
End While
' Call Close when done reading.
reader.Close()
End Using

End Sub

[解决办法]
Console.WriteLine在web下没有用的
改成response.write
[解决办法]
怎么变成了reader(0).ToString？这样写是获取列名的
reader.getString(0);是读取数据