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

namespace DAL
{
    public class SQLHelper
    {
      
        //连接字符串
        static string strConn = ConfigurationManager.ConnectionStrings["CnnhoRechargePlatformConnectionString"].ToString();

       
        
        #region 执行查询，返回DataTable对象-----------------------



        public static DataTable GetTable(string strSQL)
        {
            return GetTable(strSQL, null);
        }
        public static DataTable GetTable(string strSQL, SqlParameter[] pas)
        {
            return GetTable(strSQL, pas, CommandType.Text);
        }
        /// <summary>
        /// 执行查询，返回DataTable对象
        /// </summary>
        /// <param name="strSQL">sql语句</param>
        /// <param name="pas">参数数组</param>
        /// <param name="cmdtype">Command类型</param>
        /// <returns>DataTable对象</returns>
        public static DataTable GetTable(string strSQL, SqlParameter[] pas, CommandType cmdtype)
        {
            DataTable dt = new DataTable(); ;
            using (SqlConnection conn = new SqlConnection(strConn))
            {
                SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
                da.SelectCommand.CommandType = cmdtype;
                if (pas != null)
                {
                    da.SelectCommand.Parameters.AddRange(pas);
                }
                da.Fill(dt);
            }
            return dt;
        } 



        #endregion




        #region 执行查询，返回DataSet对象-------------------------




        public static DataSet GetDataSet(string strSQL)
        {
            return GetDataSet(strSQL,null);
        }

        public static DataSet GetDataSet(string strSQL, SqlParameter[] pas)
        { 
           return GetDataSet(strSQL,pas,CommandType.Text);
        }
        /// <summary>
        /// 执行查询，返回DataSet对象
        /// </summary>
        /// <param name="strSQL">sql语句</param>
        /// <param name="pas">参数数组</param>
        /// <param name="cmdtype">Command类型</param>
        /// <returns>DataSet对象</returns>
        public static DataSet GetDataSet(string strSQL, SqlParameter[] pas, CommandType cmdtype)
        {
            DataSet dt = new DataSet(); ;
            using (SqlConnection conn = new SqlConnection(strConn))
            {
                SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
                da.SelectCommand.CommandType = cmdtype;
                if (pas != null)
                {
                    da.SelectCommand.Parameters.AddRange(pas);
                }
                da.Fill(dt);
            }
            return dt;
        } 
        #endregion





        #region 执行非查询存储过程和SQL语句-----------------------------




        public static int ExcuteProc(string ProcName)
        {
            return ExcuteSQL(ProcName, null, CommandType.StoredProcedure);
        }

        public static int ExcuteProc(string ProcName, SqlParameter[] pars)
        {
            return ExcuteSQL(ProcName, pars, CommandType.StoredProcedure);
        }

        public static int ExcuteSQL(string strSQL)
        {
            return ExcuteSQL(strSQL, null);
        }

        public static int ExcuteSQL(string strSQL, SqlParameter[] paras)
        {
            return ExcuteSQL(strSQL, paras, CommandType.Text);
        }

        /// 执行非查询存储过程和SQL语句
        /// 增、删、改
        /// </summary>
        /// <param name="strSQL">要执行的SQL语句</param>
        /// <param name="paras">参数列表，没有参数填入null</param>
        /// <param name="cmdType">Command类型</param>
        /// <returns>返回影响行数</returns>
        public static int ExcuteSQL(string strSQL, SqlParameter[] paras, CommandType cmdType)
        {
            int i = 0;
            using (SqlConnection conn = new SqlConnection(strConn))
            {
                SqlCommand cmd = new SqlCommand(strSQL, conn);
                cmd.CommandType = cmdType;
                if (paras != null)
                {
                    cmd.Parameters.AddRange(paras);
                }
                conn.Open();
                i = cmd.ExecuteNonQuery();
                conn.Close();
            }
            r