Why does toggling the Visibility of my Form disable my KeyDown event?

I am creating a grid of Panels at runtime and it is very ugly when it resizes due to being created by a loop. In order to "hide" this operation, I have called

this.Visible = false;

before my loop and

this.Visible = true;

after my loop.

 for (int i = 0; i < Size; i++)
        {
            for (int j = 0; j < Size; j++)
            {
                _panel = new Panel();
                _panel.Location = new Point((i * _panel.Size.Width) + ((i + 1) * _border), (j * _panel.Size.Height) + ((j + 1) * _border));                    
                this.Controls.Add(_panel);
            }
        }

The above code works GREAT however it only works once. After I toggle the visibility of my form, the KeyDown event no longer happens with I press a key.

Any ideas?开发者_StackOverflow

You should never change visibility for update operations. Rather use:

this.SuspendLayout();

// Do all the resizing here.

this.ResumeLayout();

this.Visible is a server side call which prevents the html control and all of the contents of that control to not be rendered to the client. You might try changing the style to style="display:none; so that whatever is inside that 'panel' can be re streamed to the client.