怎么样判断ACCESS里的记录不重复。。然后在执行插入记录。。。。
懂的能否打给我看看。。。
这是俺的代码
                    string connStr, insertCmd;
                    connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=zhusu.mdb";
                    insertCmd = "Insert Into [Student](学号,姓名,班级,学期,年级,专业,班主任,入住时间) Values (@studentId,@name,@class,@year,@grade,@zhuanye,@teacher,@begintime)";
                    OleDbConnection conn;
                    OleDbCommand cmd;
                    conn = new OleDbConnection(connStr);
                    conn.Open();
                    cmd = new OleDbCommand(insertCmd, conn);

我知道设置为主键啊。。关键是代码咋打啊。。。就是返回错误值的判断