DBUtility/DBHelper.cs

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using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;

namespace MyWeb.DBUtility
{
    public class DBHelper
    {
        public static readonly string ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                if (connection.State != ConnectionState.Open)
                    connection.Open();
                SqlCommand command = new SqlCommand(commandText, connection);
                if (commandParameters != null)
                {
                    foreach (SqlParameter parm in commandParameters)
                        command.Parameters.Add(parm);
                }
                return command.ExecuteNonQuery();
            }
        }
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                if (connection.State != ConnectionState.Open)
                    connection.Open();
                SqlCommand command = new SqlCommand(commandText, connection);
                if (commandParameters != null)
                {
                    foreach (SqlParameter parm in commandParameters)
                        command.Parameters.Add(parm);
                }
                return command.ExecuteScalar();
            }
        }


        public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            try
            {
                if (connection.State != ConnectionState.Open)
                    connection.Open();
                SqlCommand command = new SqlCommand(commandText, connection);
                if (commandParameters != null)
                {

                    foreach (SqlParameter parm in commandParameters)
                        command.Parameters.Add(parm);

                }