Export Data into CSV file using Asp.net

How to use below code.

First create one default.aspx page and add below code into code behind file.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string[] mylist = new string[5]; //Declaring the string array;

//Assigning values to each element in the array
mylist[0] = "Hello";
mylist[1] = "how";
mylist[2] = "are";
mylist[3] = "you";
mylist[4] = "?";

//Creating a new List of type
List StringtoList = new List(mylist.Length);

//AddRange is a method of List objects that enables the conversion.
//We just need to pass the reference to the array.
StringtoList.AddRange(mylist);

CSVExporter.WriteToCSV(StringtoList);
}
}


Then create one CSVExporter.cs file into app_code and add below code into class file.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;

///

/// Summary description for CSVExporter
///

public class CSVExporter
{
public static void WriteToCSV(List personList)
{
string attachment = "attachment; filename=PersonList.csv";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.AddHeader("content-disposition", attachment);
HttpContext.Current.Response.ContentType = "text/csv";
HttpContext.Current.Response.AddHeader("Pragma", "public");
WriteColumnName();
foreach (String person in personList)
{
WriteUserInfo(person);
}
HttpContext.Current.Response.End();
}

private static void WriteUserInfo(String person)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(person);
//AddComma(person.Name, stringBuilder);
//AddComma(person.Family, stringBuilder);
//AddComma(person.Age.ToString(), stringBuilder);
//AddComma(string.Format("{0:C2}", person.Salary), stringBuilder);
HttpContext.Current.Response.Write(stringBuilder.ToString());
HttpContext.Current.Response.Write(Environment.NewLine);
}

private static void AddComma(string value, StringBuilder stringBuilder)
{
stringBuilder.Append(value.Replace(',', ' '));
stringBuilder.Append(", ");
}

private static void WriteColumnName()
{
string columnNames = "Name, Family, Age, Salary";
HttpContext.Current.Response.Write(columnNames);
HttpContext.Current.Response.Write(Environment.NewLine);
}
}

Then press f5 and you will get result.