I want to show this no.of days expiry in main form after expiry should ask renewal msg?

Question

1.00/5 (1 vote)

See more:

I have tried No.of days as mentioned below in load

but i want my application should close after 365 days and msgbox should show renewal and close the applications

1. Every days should reduce the date from date of installation
2. after 365 days should warn about the validtity

Please help me

What I have tried:

Dim firstDate As Date
       Dim SecondDate As Date



       firstDate = Now
       SecondDate = "2021-03-14"

       Label1.Text = DateDiff(DateInterval.Day, firstDate, SecondDate)

Posted 13-Mar-20 4:15am

Member 14621280

Updated 13-Mar-20 6:32am

v2

Add a Solution

Comments

Richard MacCutchan 13-Mar-20 10:36am

All you need is the difference between date of installation (wherever you store that) and DateTime.Now. If that is more than the maximum period allowed then stop the program.

Member 14621280 13-Mar-20 10:40am

first date would be the date of installation

Richard MacCutchan 13-Mar-20 12:00pm

That is what I said. But your code has it the other way round, and assumes that the application will run out of time on 14th March 2021.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2020-03-13T06:32:00

This is (logically) what you need:

C#

// year, month and day values from your licence key
DateTime date1 = new DateTime(year, month, day);
Console.WriteLine("Application installation date: {0}", date1.ToString("dd MMMM yyyy"));

DateTime date2  = DateTime.Now;
Console.WriteLine("Current date: {0}", date2.ToString("dd MMMM yyyy"));
TimeSpan interval = date2 - date1;
Console.WriteLine("Application has been installed for: {0} days", interval.Days);
if (interval.Days > 365)
{
    Console.WriteLine("Your licence has expired, please contact Customer Services");
    throw new Exception("Expired licence");
}