In this blog 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>
</head>
<body>
<form
id="form1"
runat="server">
<div>
</div>
<asp:Button ID="generateid"
runat="server"
Text="Generate
Id"
onclick="generateid_Click" /><br />
<asp:TextBox ID="TextBox1"
runat="server"></asp:TextBox>
</form>
</body>
</html>
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;
}
}
}
Thanks