how to use one form only one time in c#.net

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1.00/5 (2 votes)

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i made a c# application with product key facility and there are two forms one is named "ProductKey" and another one is "Home" .

when i run this form then it go to product key page and after verification of product key it go to home page and when i re-run this application it again show the product key page.
but i want that after verification of product key when i re-run this application then it will directly go to home page.

Posted 1-Dec-15 0:51am

Sanjay Kumawat

Updated 1-Dec-15 0:56am

phil.o

v2

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BillWoodruff 1-Dec-15 8:49am

You need to clarify:

1. first time run: go to product key form ... enter key ? you write the key to the local machine ? then goes to application

2. second time run: shows product key form ... why ? what does the user do here ?

3. third and other runs: application checks for valid product key and then goes directly to main form ?

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Kornfeld Eliyahu Peter · Answer 1 · 2015-12-01T01:08:00

every application has an entry point - in case of Windows Form Application this is the Main method...
You have somewhere in your code code like this:

C#

static void Main ( )
{
  // some code here
  Application.Run( new ProductKey( ) );
}

At this point you should do these:
1. Check if you already has a valid product key (from registry/web service/config file)
2. If do open 'Home'
3. If do not open 'ProductKey' (In that form store result of validation in registry/web service/config file)

CPallini · Answer 2 · 2015-12-01T01:35:00

Solution 2

In order to accomplish such a task you need to persist the info that your "ProductKey" form has been already shown. See, for instance "Walkthrough: Persisting an Object (C# and Visual Basic)"[^].

Posted 1-Dec-15 1:35am

CPallini

Comments

Sergey Alexandrovich Kryukov 1-Dec-15 14:47pm

Sure, a 5.
—SA

CPallini 1-Dec-15 16:30pm

Thank you.