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      protected   void   btn_SendMessage_Click(object   sender,   EventArgs   e)
        {
                SqlConnection   conn   =   new   SqlConnection(@"server=(local)\SQLEXPRESS;database=GuestBook;Trusted_Connection=True");
                string   Sql   =   "INSERT   INTO   tbGuestBook   (UserName,PostTime,Message,IsReplied,Reply)   values   ('test','2008-1-17   10:12','编程快乐',0,'')";
                SqlCommand   cmd   =   new   SqlCommand(Sql,   conn);
                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Close();
        }
用的是VS2005编写的留言本，运行后出现标题错误，数据库中ID的数据类型为uniqueidentifier