DBHlper

第二个项目 酒店管理系统

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

namespace DAL
{
public class DBHelper
{
//连接字符串
public static string connstr = “server=DESKTOP-4HM5BLU;uid=sa;pwd=123456;database=hotel”;

    public static DataTable ExcuteTable(string sql)
    {
        SqlDataAdapter sda = new SqlDataAdapter(sql, connstr);
        DataTable dt = new DataTable();
        sda.Fill(dt);
        return dt;
    }

    public static int ExecuteNonQuery(string sql)
    {
        SqlConnection conn = new SqlConnection(connstr);
        conn.Open();
        SqlCommand comm = new SqlCommand(sql, conn);
        return comm.ExecuteNonQuery();

    }
}

}