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Saturday, 18 July 2015

How to Read Text File Each Line Using c# In Asp.net

7/18/2015 - By Pranav Singh 0

This article will show you how to read text file each line using c# in asp.net. In this C# code will read each and every line of the text file present in the server folder in asp.net application.


So for this article first we will create a folder and add the text file in it with some content.


Now add some text in file.

Now add the below code into the page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm17.aspx.cs" Inherits="WebApplication2.WebForm17" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>How to Read Text File Each Line Using c# In Asp.net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="Button1" runat="server" Text="Click To Read the File"
            onclick="Button1_Click" /><br />
            <asp:Label ID="lblMessage" runat="server" style="color: #FF0000"></asp:Label>
    </div>
    </form>
</body>
</html>

In above I have taken a button control and a label. When user click on button he will be able to read the text and display into the label control.

Now here is the code to read the file.

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

namespace WebApplication2
{
    public partial class WebForm17 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            int lineCounter = 0;
            string finalStringText = "";
            string datastring;
            StreamReader textfile = new StreamReader(Server.MapPath(@"TextFile\TextFile1.txt"));
            while ((datastring = textfile.ReadLine()) != null)
            {
                finalStringText = finalStringText + datastring;
                lineCounter++;
            }
            lblMessage.Text = finalStringText;
        }
    }
}

In above code I have first locate the file and then read the file to display on label control. Now we have done run the application to check the output.



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