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Generate Sequence Number and save it to a file in asp.net.

Posted By:satyapriyanayak       Posted Date: October 06, 2013    Points: 40    Category: ASP.NET Controls    URL: http://www.dotnetspark.com  

We will know how to generate Sequence Number and save it to a file in asp.net.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Generate_id._Default" %>

<!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>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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