数据库第十四章示例3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;

namespace ConsoleApplication2
{
    class Program
    {
        private const string strconn = "Data Source=.;Initial Catalog=MySchool;Integrated Security=True";
        static void Main(string[] args)
        {
            Program p=new Program();
            string name="admin";
            string pass="0";
           
           bool b= p.CheckUserInfo(name,pass);
            if(b)
            {
                Console.WriteLine("成功");
            }
            else
            {
                Console.WriteLine("登录失败!");
            }
            Console.ReadLine();
        }
            
     public bool CheckUserInfo(string Name, string pwd)
        {
            SqlConnection conn = new SqlConnection(strconn);
           
            try
            {
             
                string strSql = "select count(*) from Admin where LoginId='"+Name+"'and LoginPwd='"+pwd+"'";
                conn.Open();
                SqlCommand comm = new SqlCommand(strSql, conn);
                int iRet = (int)comm.ExecuteScalar();
              if(iRet>0){
                  Console.WriteLine(strSql);
                  return true;
              }
            }
            catch (Exception ex)
            {
                Console.WriteLine("错了"+ex.Message);
            }
            finally
            {
                conn.Close();
            }
            return false;
        }

    }
}