class1.cs

.net三层结构的源码

using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Text;
using IDal;

namespace SQLServerDal
{
    public class SQLServerDal : IDAL
    {

        #region IDAL 成员

        public System.Data.DataSet SelectSQL(string sql)
        {
            SqlConnection conn = new SqlConnection(
                ConfigurationManager.ConnectionStrings["connString"].ConnectionString);
            SqlCommand comm = new SqlCommand();
            comm.Connection = conn;
            comm.CommandText = sql;
            SqlDataAdapter adapter = new SqlDataAdapter(comm);
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            return ds;
        }

        public bool ExcuteSQL(string sql)
        {
            SqlConnection conn = new SqlConnection(
                           ConfigurationManager.ConnectionStrings["connString"].ConnectionString);
            SqlCommand comm = new SqlCommand();
            comm.Connection = conn;
            comm.CommandText = sql;
            int count = comm.ExecuteNonQuery();
            if (count > 0) return true;

            return false;
            
        }

        #endregion
    }
}