Minifycode 2021-10-03 Viewed 1.2K times ASP.NET

In this article,you will  learn what is OTP expiry time in asp net c#

 

It will generate an OTP which will send to your registered mobile number. The OTP lasts 4 minutes, after this time, it will expire and the user will need to generate a new one.

 

DateTime.Now.Subtract(i.createDate).TotalMinutes <= 4

 

OTP Full Form - The full form of OTP is the One Time PasswordOTP is a code of four to six digits that is often referred to as a one-time pin or dynamic password. It is a form of security password which is effective for the payment or single-use which is used for payment on the mobile phone, computer and so on.

 

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>How to Send and Verify OTP On Mobile No Using C# In Asp.Net</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            Mobile No:
        <asp:TextBox ID="txtMobileNo" runat="server" Width="200px"></asp:TextBox>
             <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Send OTP" />

            <br />
            <asp:Label ID="lblMessage" runat="server" Text=""></asp:Label>
        </div>
    </form>
</body>
</html>
 
 
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Shoping_Cart
{
    public partial class SendOTP : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                Random r = new Random();
                string OTP = r.Next(1000, 9999).ToString();

                //Send message
                string Username = "youremail@domain.com";
                string APIKey = "YourHash";
                string SenderName = "MyName";
                string Number = "981111111";
                string Message = "OTP code is - " + OTP;
                string URL = "http://api.minifycode.in/send/?username=" + Username + "&hash=" + APIKey + "&sender=" + SenderName + "&numbers=" + Number + "&message=" + Message;
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(URL);
                HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
                StreamReader sr = new StreamReader(resp.GetResponseStream());
                string results = sr.ReadToEnd();
                sr.Close();
                
                Session["OTP"] = OTP;

                //Redirect for varification
                Response.Redirect("VerifyOTP.aspx");
            }
            catch (Exception ex)
            {
                lblMessage.Text = ex.Message.ToString();
            }
        }

    }
}
 
 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Verify.aspx.cs" Inherits="Cart.VerifyOTP" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Verify OTP</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            OTP:
        <asp:TextBox ID="txtOTP" runat="server" Width="200px"></asp:TextBox>
             
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Verify OTP" />
            <br />
            <asp:Label ID="lblMessage" runat="server" Text=""></asp:Label>
        </div>
    </form>
</body>
</html>
 
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

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

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            if (Session["OTP"].ToString() == txtOTP.Text)
            {
                lblMessage.Text = "You have enter correct OTP.";
                Session["OTP"] = null;
            }
            else
            {
                lblMessage.Text = "Pleae enter correct OTP.";
            }
        }
    }
}

OTP expiry time in asp net c#
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html> <html> <head> <title>Asp.Net Repeater Control</title> </head> <body> <form id="form1" runat="server"> <div style="font:13px Verdana;width:310px;"> <asp:ScriptManager ID="scriptManager" runat="server" EnablePageMethods="true" /> <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"> <ContentTemplate> <h3>Asp.Net Repeater Control</h3> <%--THE REPEATER CONTROL.--%> <asp:Repeater id="rp" runat="server"> <%--HEADER OF THE REPEATER--%> <HeaderTemplate> <table border="0" width="200px"> </HeaderTemplate> <%--SHOWING ITEMS--%> <ItemTemplate> <tr> <td style="padding:2px; border:solid 1px #CCC;"> <asp:Label Text='<%# Container.DataItem.ToString() %>' runat="server"></asp:Label> </td> </tr> </ItemTemplate> <%--ALTERNATE TEMPLATE (SHOWING ITEMS IN DIFFERENT COLOR--%> <AlternatingItemTemplate> <tr> <td style="padding:2px; border:solid 1px #CCC; background:#EAF7FB; width:200px;"> <asp:Label Text='<%# Container.DataItem.ToString() %>' runat="server"></asp:Label> </td> </tr> </AlternatingItemTemplate> <%--REPEATER FOOTER--%> <FooterTemplate> </table> <div style="padding:20px 0;"> <asp:Label ID="lblFoot" runat="server"></asp:Label> </div> </FooterTemplate> </asp:Repeater> <%--BUTTON CONTROL--%> <asp:Button ID="btVF" Text="View Files" AutoPostBack="true" OnClick="Show" Font-Names="sanserif" Font-Italic="true" Font-Size="155%" runat="server" /> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="PostBackTrigger" /> </Triggers> </asp:UpdatePanel> </div> </form> </body> </html> using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) {} protected void Show(object sender, EventArgs e) { DirectoryInfo Folder = new DirectoryInfo(Server.MapPath("Files\\")); FileInfo[] fileList = Folder.GetFiles("*.*"); //BIND THE FILE LIST WITH THE REPEATER CONTROL. rp.DataSource = fileList; rp.DataBind(); } } Adding the <AlternatingTemplate> below the <ItemTemplate> will show files with a different background color for every alternate row. <AlternatingItemTemplate> <div style="padding:3px; border:solid 1px #FFF; background:#black"> <asp:Label Text='<%# Container.DataItem.ToString() %>' runat="server"></asp:Label> </div> </AlternatingItemTemplate> </AlternatingItemTemplate> <SeparatorTemplate><hr /> </SeparatorTemplate> Add the <HeaderTemplate> element just above the <ItemTemplate> <HeaderTemplate> <div style="padding-bottom:20px"><strong>Files</strong> (Header)</div> </HeaderTemplate> Repeater with <FooterTemplate> element <FooterTemplate> <div style="padding-top:20px"><asp:Label ID="lblFooter" runat="server"></asp:Label></div> </FooterTemplate> Code Behind In C# Control ft = rp.Controls[rep.Controls.Count - 1].Controls[0]; Label lbl_Footer = ft.FindControl("lblFooter") as Label; lbl_Footer.Text = "Showing total <b>" + fileList.Length + "</b> files in the Footer.";