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Tips for LINQ: Fill any generic List from a DataTable

, 3 Mar 2009 CPOL 58.7K 432 43
This article shows how to populate any generic list from a DataTable.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace FromDataTableToGenericListExample
{    
    public static class SqlDataBase
    {
        private static SqlConnection Connection;
        private static SqlCommand Command;
        private static SqlDataAdapter DataAdapter;

        public static bool Connect(string servername, string databasename, string user, string password)
        {

            try
            {
                Connection = new SqlConnection();
                string connectionstring = "Server=" + servername + ";Database=" + databasename + ";User ID=" + user + ";Password=" + password + ";Trusted_Connection=False";
                Connection.ConnectionString = connectionstring;
                Connection.Open();

                return true;
            }
            catch (Exception Ex)
            {
                Console.WriteLine(Ex.ToString());
                return false;
            }
        }

        public static void Disconnect()
        {
            if (Connection != null)
            {
                if (Connection.State == ConnectionState.Open)
                {
                    Connection.Close();
                    Connection.Dispose();
                }
            }
        }

        public static DataTable ReturnDataTable(string strSql)
        {
            DataTable dt = new DataTable();

            try
            {
                Command = new SqlCommand(strSql, Connection);
                DataAdapter = new SqlDataAdapter(Command);
                DataAdapter.Fill(dt);
                DataAdapter.Dispose();
                Command.Dispose();

                return dt;
            }

            catch (Exception Ex)
            {
                Console.WriteLine(Ex.ToString());
                return null;
            }
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Santiago Sanchez
Software Developer
Spain Spain
I´ve been working with Oracle, Sql Server and Visual Basic 6 since 2003 and with C# since 2006. Now I´m fighting with Biztalk 2006 too...

MCTS - .NET Framework 4, Windows Applications
MCTS - Accessing Data with .NET Framework 4

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