SqlHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace MyPhotos.DAL
{
    class SQLHelper
    {
        //读取配置文件中的连接字符串
        private static string connStr = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;

        //
        public static DataTable GetTable(string sql,params SqlParameter[] param)
        {
            DataTable dt = new DataTable();
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(sql,conn))
                {
                    cmd.Parameters.AddRange(param);

                    using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                    {
                        sda.Fill(dt);
                    }
                }
            }
            return dt;
        }

        //调用存储过程的方法
        public static DataTable GetTable(string sql, CommandType ct,params SqlParameter[] param)
        {
            DataTable dt = new DataTable();
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(sql, conn))
                {
                    //设置执行存储过程还是sql语句
                    cmd.CommandType = ct;
                    cmd.Parameters.AddRange(param);

                    using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                    {
                        sda.Fill(dt);
                    }
                }
            }
            return dt;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static int ExecuteNonQuery(string sql, params SqlParameter[] param)
        {
            int r = -1;
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(sql, conn))
                {
                    cmd.Parameters.AddRange(param);

                    conn.Open();

                    r = cmd.ExecuteNonQuery();
                }
            }
            return r;
        }

    }
}