using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using DataProvider;
namespace DataProvider
{
    public static class DBHelper
    {
        
        private static SqlConnection connection;
        public static SqlConnection Connection
        {
            get 
            {
               // string connectionString = "Data Source=.;Initial Catalog=blogDB;Integrated Security=True";
               string connectionString = ConfigurationManager.ConnectionStrings["gmwl"].ConnectionString;
                if (connection == null)
                {
                    connection = new SqlConnection(connectionString);
                    connection.Open();
                }
                else if (connection.State == System.Data.ConnectionState.Closed)
                {
                    connection.Open();
                }
                else if (connection.State == System.Data.ConnectionState.Broken)
                {
                    connection.Close();
                    connection.Open();
                }
               
               
                return connection;
            }
        }

        public static int ExecuteCommand(string safeSql)
        {
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            int result = cmd.ExecuteNonQuery();
            return result;
        }

        public static int ExecuteCommand(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd = new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            return cmd.ExecuteNonQuery();
        }

        public static bool EXECommand(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd = new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            cmd.ExecuteNonQuery();
            return true;
        }

        public static int GetScalar(string safeSql)
        {
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            int result = Convert.ToInt32(cmd.ExecuteScalar());
            return result;
        }

        public static int GetScalar(params SqlParameter[] values)
        {
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = Connection;
            cmd.CommandText = "Pro_InsertOrder";
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddRange(values);
            int result = Convert.ToInt32(cmd.ExecuteScalar());
            return result;
        }

        public static int GetScalar(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd = new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            int result = Convert.ToInt32(cmd.ExecuteScalar());
            return result;
        }

        public static SqlDataReader GetReader(string safeSql)
        {

            try
            {
                SqlCommand cmd = new SqlCommand(safeSql, Connection);
                SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                
                return reader;
               
            }
            catch (Exception)
            {
                connection.Close();
                throw;
            }
      
           
            
        }

        public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
        {

            try
            {
                SqlCommand cmd = new SqlCommand(sql, Connection);
                cmd.Parameters.AddRange(values);
                SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                
                return reader