dbhelper.cs

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



namespace MyTicketService.DAL
{
    public static class DBHelper
    {

        private static SqlConnection connection;
        public static SqlConnection Connection
        {
            get 
            {
                string connectionString = "server=(local);uid=sa;pwd=sa;database=MyTicketSale";
                connection = new SqlConnection(connectionString);
                if (connection == null)
                {                    
                    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 string ReturnStringScalar(string safeSql)
        {
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            try
            {
                string result = cmd.ExecuteScalar().ToString();
                return result;
            }
            catch (Exception e)
            {
                return "0";
            }
            connection.Close();
        }

        public static int GetScalar(string safeSql)
        {
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            try
            {
                int result = Convert.ToInt32(cmd.ExecuteScalar());
                return result;
            }
            catch (Exception e)
            { 
                return 0;
            }
            connection.Close();
        }

   
        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;
            connection.Close();
        }

        public static SqlDataReader GetReader(string safeSql)
        {
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            SqlDataReader reader = cmd.ExecuteReader();
            return reader;
            reader.Close();
            reader.Dispose();
        }

        public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
        {
            SqlCommand cmd = new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            SqlDataReader reader = cmd.ExecuteReader();
            return reader;
            reader.Close();
            reader.Dispose();
           
        }

        public static DataTable GetDataSet(string safeSql)
        {
            DataSet ds = new DataSet();
            SqlCommand cmd = new SqlCommand(safeSql, Connection);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(ds);
            connection.Close();
            connection.Dispose();
            return ds.Tables[0];
        }

        public static DataTable GetDataSet(string sql, params SqlParameter[] values)
        {
            DataSet ds = new DataSet();
            SqlCommand cmd = new SqlCommand(sql, Connection);
            cmd.Parameters.AddRange(values);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(ds);
            connection.Close();
            connection.Dispose();
            return ds.Tables[0];           

        }

    }
}