Close second form from first form in C#

Question

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Hello sir/Mam

I have created 2 forms in c#.

I want to close 2nd form (not existing) from 1st form in c#.

Below code is not working.

2nd_form 2n = new 2nd_form();
2n.close();

Please help.

What I have tried:

Below code is not working.

2nd_form 2n = new 2nd_form();
2n.close();

Please help.

Posted 18-Mar-19 21:57pm

Nand Kishor Upadhyay

Updated 19-Mar-19 0:31am

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2 solutions

Solution 2

You have to show a form first before it can be closed.
You can try this:

2nd_form 2n = new 2nd_form();
2n.Show();
// Your code here e.g. Thread.Sleep(5000)
// or put a breakpoint on the next line
2n.Close();

Posted 19-Mar-19 0:32am

RickZeeland

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

OriginalGriff · Accepted Answer · 2019-03-18T22:33:00

It cant work: you are closing an instance of the form that you just created - that's what new means!

Think of it this way: If you put your phone in the glove box of your car and then buy a new car would you expect to open the new glove box and find your phone there? Of course not - the glove box is part of the old instance of a Car and that is entirely separate from the new Car.

To close the version the user is looking at you need to locate it - which means looking at your code where you Show the form and working out where you have stored the instance.

Close second form from first form in C#

2 solutions

Solution 2

Solution 1

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Close second form from first form in C#

2 solutions

Solution 2

Solution 1

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