Write DataTable Data to Text File using C#

Appending the DataTable data to Text File in C# can be achieved easily by just lopping each row of the DataTable and placing to text file as code shown below. In the below code i have created the DataTable with three columns and entered the data. am passing the DataTable data to text file using  StreamWriter

DataTable to TextFile

using System;

using System.Web;

using System.IO;

using System.Data;

namespace WebApplication1

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        protected void Button1_Click(object sender, EventArgs e)

        {

            StreamWriter swExtLogFile = new StreamWriter("D:/Log/log.txt",true);

            DataTable dt = new DataTable();

           //Adding data To DataTable

            dt.Columns.Add("ID");

            dt.Columns.Add("Name");

            dt.Columns.Add("Address");

            dt.Rows.Add(1, "venki","Chennai");

            dt.Rows.Add(2, "Hanu","London");

            dt.Rows.Add(3, "john","Swiss");

           

            int i;

            swExtLogFile.Write(Environment.NewLine);

            foreach (DataRow row in dt.Rows)

            {  

                object[] array = row.ItemArray;

                for (i = 0; i < array.Length - 1; i++)

                {

                   swExtLogFile.Write(array[i].ToString() + " | ");

                }

                swExtLogFile.WriteLine(array[i].ToString());             

            }

            swExtLogFile.Write("*****END OF DATA****"+DateTime.Now.ToString());

            swExtLogFile.Flush();

            swExtLogFile.Close();

        }

    }

}