CODEWITHSUNDEEP
c#winforms
Al Lelopath
Al Lelopath

Reputation: 6778

What is the event when closing a UserControl?

I have a class that inherits from UserControl:

public partial class MyView : System.Windows.Forms.UserControl

I want to handle the event that occurs when the user clicks on the X in the upper right corner. Maybe it is Form.Closing? But I don't see that as an option in the designer. What event is it?

Edit:

Here is a list of all events available in the designer

Upvotes: 6

Views: 9742

Answers (1)

iceberg
iceberg

Reputation: 596

class SomeControl : UserControl
{
    Form _owner;

    public SomeControl()
    {
    }

    protected override void OnVisibleChanged(EventArgs e)
    {
        base.OnVisibleChanged(e);

        if (Visible)
        {
            _owner = FindForm();
            //_owner = ParentForm; 
            _owner.FormClosing += _owner_FormClosing;
            _owner.FormClosed += _owner_FormClosed;
        }
    }

    private void _owner_FormClosed(object sender, FormClosedEventArgs e)
    {
        throw new NotImplementedException();
    }

    private void _owner_FormClosing(object sender, FormClosingEventArgs e)
    {
        Hide();
        _owner.FormClosing -= _owner_FormClosing;
        _owner.FormClosed -= _owner_FormClosed;
        Parent.Controls.Remove(this);
        _owner = null;
    }
}

Upvotes: 4

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