How to showing message box in mdi parent form when child form2 is closed

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i was trie to set in mdichild activate event but its work form all child form but i wat its for only one child form form2. i have 3 child form. form1,Form2 and form3.
please help me how can i solve it..

What I have tried:

private void MDI PATENT_MdiChildActivate(object sender, EventArgs e)
{

if(this.mdichildren.lenght==null)
{
messagebox.show("Form 2 is Closed");
}
}

Posted 14-Feb-16 21:01pm

Arth01

Updated 14-Feb-16 21:03pm

v2

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Comments

Sinisa Hajnal 15-Feb-16 3:33am

If you want something when the child is closed, you should handle closing or closed event of the child form. If you need to do something in parent form, I think you have to publish your own event that you will trigger in form closed of the child form.
(this assumes I understand your question correctly, please write in your native language and use google translator as a starting point if you're not sure how to formulate the question in English)

Arth01 15-Feb-16 4:14am

opps sorry for confusion..

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OriginalGriff · Accepted Answer · 2016-02-14T21:32:00

Solution 1

Instead of relying on the Activate method for a different child - which may not happen if there is only one MDI child open - handle the FormClosing or FormClosed event instead and display your message box in that.

Posted 14-Feb-16 21:32pm

OriginalGriff

Comments

Arth01 15-Feb-16 4:14am

ya thanks got it..

OriginalGriff 15-Feb-16 4:21am

You're welcome!

BillWoodruff 15-Feb-16 16:19pm

"But in these cases
We still have judgment here, that we but teach
Bloody instructions, which, being taught, return
To plague th' inventor"

http://www.codeproject.com/Answers/1078694/How-to-visible-panel-in-mdi-parent-form-when-child

:)