How do I enable a button after a for closes? C# .NET

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C#

private void btnSignUpOpt_Click(object sender, EventArgs e)
{
    Members aMember = new Members();
    aMember.Show();
    (sender as Button).Enabled = false;
            
}

this is how i disable it, but i cant find a way of enabling it after i close the form aMember.

What I have tried:

I tried:

C#

btnSignUp.Enable = true;

but that would make the button be enabled even if the form is already open

Posted 6-Sep-18 9:45am

Member 13975729

Updated 6-Sep-18 10:27am

Nelek

v2

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Graeme_Grant · Answer 1 · 2018-09-06T10:19:00

Solution 1

There are many different ways of doing what you want:
1. open the form modally, then the code in the button event will pause until you close the aMember form;
2. enable the btnSignUpOpt from the aMember close event
3. pass an Action to the aMember form before showing, then call the action from aMember before closing where the Action enables the button
4. listen to the closing event in the host form before showing the aMember form and enable the btnSignUpOpt when the event is captured
5. and so on...

Posted 6-Sep-18 10:19am

Graeme_Grant

Comments

Member 13975729 7-Sep-18 9:33am

I tried the event to close form, but it was still throwing exceptions.
And i was not able to enable the button from the child form. I tried to create and instance of the parent form to call the button, but was not possible.

Richard Deeming 7-Sep-18 10:13am

private void btnSignUpOpt_Click(object sender, EventArgs e)
{
    Button btn = (Button)sender;
    Members aMember = new Members();
    aMember.Closed += delegate { btn.Enabled = true; };
    aMember.Show();
    btn.Enabled = false;     
}

If you're getting an exception, then you need to provide the full details of the exception.

Graeme_Grant 7-Sep-18 17:59pm

That is another way ... ;)