How to generate Sequence Number and save it to a file in

Posted by Satyapriyanayak under ASP.NET category on | Points: 40 | Views : 1654
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Generate_id._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="" >
<head runat="server">
<title>Untitled Page</title>
<form id="form1" runat="server">

<asp:Button ID="generateid" runat="server" Text="Generate Id"
onclick="generateid_Click" /><br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
namespace Generate_id
public partial class _Default : System.Web.UI.Page

protected void generateid_Click(object sender, EventArgs e)
TextBox1.Text = GenerateSequenceNumber().ToString();
private int GenerateSequenceNumber()
string s2 = (Server.MapPath("test.txt"));
FileInfo fiRead = new FileInfo(s2);
string input = string.Empty;
int n1 = 1;
if (fiRead.Exists)
input = File.ReadAllText(s2);
if (input != string.Empty)
n1 = Convert.ToInt32(input);
File.WriteAllText(s2, (n1 + 1).ToString());
return n1;

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