How to detect when client delete license file desktop app ?

ahmed elbarbary

I working on desktop application windows desktop made by csharp

I make license file have period of license as 30 day and start date and computer mac address

my issue is clients delete license file so desktop app start as first day after delete this file

so how to prevent users from delete license file

or with another way how to make my app detect that file created before and deleted so can't open my app

2 Replies

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Rijwan Ansari4y ago
You can write code at application start to check license file and validate.

When you create windows application, a file program.cs is automatically created for you. You can put code under Main function of this class which you want to executed on startup.

Here is snapshot of the class.
using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace WindowsApplication1
{
   static class Program
       {
          [STAThread]
          static void Main()
             {

                 try
                   {
            string path = @ "c:\temp\MySample.txt";  //License Url
            if (!File.Exists(path)) {
                Application.Run(new licenseRequiredForm());//load License Required form
                }
                   }
                 catch (Exception ex)
                  {
                           MessageBox.Show(ex.ToString());
                  }
                 Application.Run(new Form1());//load main form
            }
   }
}
You can write more logic for validation.
Regards
0
Srinivasan Ramamoorthi4y ago
Can you store the license file in database in file or blob storage for each user.

Other option is place the file in a folder where the user can't find.
0