OleDbCommand更新数据的一些问题

using (OleDbConnection connection1 = new OleDbConnection(connectionString))
            {
                OleDbCommand command1 = new OleDbCommand();
                command1.Connection = connection1;
                command1.CommandType = CommandType.Text;
                command1.CommandText = "select * from 成绩单";
                connection1.Open();//打开连接
                OleDbDataAdapter myDataAdapter1 = new OleDbDataAdapter(command1);
                myDataAdapter1.SelectCommand = command1;
                DataSet ds = new DataSet();
                myDataAdapter1.Fill(ds,"成绩单");
                command1.CommandText = "UPDATE 成绩单 SET ASP=" + finalMarks + " WHERE 学号=" + Application["user"];
                OleDbDataAdapter myDataAdapter2 = new OleDbDataAdapter();
                myDataAdapter2.UpdateCommand = command1;
                command1.ExecuteNonQuery(); 
                try { }
                catch { };
                myDataAdapter2.Update(ds,"成绩单");
 
            }  

检查 字段”ASP” 和 “学号” 的数据类型和 等号 后面的 数据类型是否一致,

例如 学号=1  

执行sql 语句时 会尝试把学号列转成 数字型 

如果学号中有非数字,则转换出错。