SqlHelper

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

public  class  SqlHelper
{
    public static readonly string ConnectionString = ConfigurationManager.AppSettings["Help"];

    private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
 
    public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        return ExecuteNonQuery(ConnectionString, cmdType, cmdText, commandParameters);
    }

  
    public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {

        SqlCommand cmd = new SqlCommand();
        using (SqlConnection conn = new SqlConnection(connectionString))
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
            int val = cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            return val;
        }
    }

 
    public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {

        SqlCommand cmd = new SqlCommand();

        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        int val = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return val;
    }

   
    public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
        int val = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return val;
    }

  
    public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        return ExecuteReader(ConnectionString, cmdType, cmdText, commandParameters);
    }

  
    public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        SqlConnection conn = new SqlConnection(connectionString);
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
            SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            cmd.Parameters.Clear();
            return rdr;
        }
        catch
        {
            conn.Close();
            throw;
        }
    }

 
    public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        SqlDataReader rdr = cmd.ExecuteReader();
        cmd.Parameters.Clear();
        return rdr;
    }

    public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        return ExecuteScalar(ConnectionString, cmdType, cmdText, commandParameters);
    }

   
    public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
            object val = cmd.ExecuteScalar();
            cmd.Parameters.Clear();
            return val;
        }
    }

 
    public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {

        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        object val = cmd.ExecuteScalar();
        cmd.Parameters.Clear();
        return val;
    }

 
    public static object ExecuteScalar(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
        object val = cmd.ExecuteScalar();
        cmd.Parameters.Clear();
        return val;
    }

 
    public static DataTable ExecuteTable(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        return ExecuteTable(ConnectionString, cmdType, cmdText, commandParameters);
    }

  
    public static DataTable ExecuteTable(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
            SqlDataAdapter ap = new SqlDataAdapter();
            ap.SelectCommand = cmd;
            DataSet st = new DataSet();
            ap.Fill(st, "Result");
            cmd.Parameters.Clear();
            return st.Tables["Result"];
        }
    }

 
    public static DataTable ExecuteTable(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {

        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        SqlDataAdapter ap = new SqlDataAdapter();
        ap.SelectCommand = cmd;
        DataSet st = new DataSet();
        ap.Fill(st, "Result");
        cmd.Parameters.Clear();
        return st.Tables["Result"];
    }

  
    public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
    {
        parmCache[cacheKey] = commandParameters;
    }

  
    public static SqlParameter[] GetCachedParameters(string cacheKey)
    {
        SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
        if (cachedParms == null)
            return null;
        SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
        for (int i = 0, j = cachedParms.Length; i < j; i++)
            clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
        return clonedParms;
    }

 
    private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
    {
        if (conn.State != ConnectionState.Open)
            conn.Open();
        cmd.Connection = conn;
        cmd.CommandText = cmdText;
        if (trans != null)
            cmd.Transaction = trans;
        cmd.CommandType = cmdType;
        if (cmdParms != null)
        {
            foreach (SqlParameter parm in cmdParms)
                cmd.Parameters.Add(parm);
        }
    }
}