ado.cs

一个简单的考生答题系统

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
namespace Myschool
{
    //数据库连接
    class Ado
    {
        private static SqlCommand comm = null;
        //建立连接
        public static bool select(string name,string pwd) {
            int num = 0;
            try
            {   
                Connect.conn.Open();//打开连接
                comm = Connect.conn.CreateCommand();
                comm.CommandText = string.Format("select count(*) from sudent where loginid='{0}' and loginpwd='{1}'", name, pwd);
                num = Convert.ToInt32(comm.ExecuteScalar());
            }
            catch (Exception es)
            {
                Console.WriteLine(es.Message);
            }
            finally {
                Connect.conn.Close();
            }
                if (num > 0)
                {
                    return true;
                }
                else
                {
                    return false;
                }
           
        }
    }
}