Allow user to resize groupbox columns

Question

I have a groupbox with 3 columns, how would i allow users to resize the column size?

Inside each groupbox column is another groupbox with a textbox set to fill the area. When the user maximizes the form I want the groupbox columns to be able to be resized by the user.

Edit... This is a winforms application

Edit again.... I have now inspected it alittle closer and whats actually going on is I have a main groupbox with a TableLayoutPanel with 3 columns with a group box inside each column. (Sorry this is a really old project that im bringing to life.

Answer 1

You could use a SplitContainer control. It gives you two panels in which to place other controls, including more SplitContainers.

So if you drop one on your form, then drop a second one inside one of the panels on the first, you'll have three "columns" where you can place each of your GroupBoxes.

Then you could set IsSplitterFixed = true on the splitters initially, to disable resizing the panels, then re-enable them if the user maximizes the window:

private void Form1_SizeChanged(object sender, EventArgs e)
{
    splitContainer1.IsSplitterFixed = WindowState != FormWindowState.Maximized;
    splitContainer2.IsSplitterFixed = WindowState != FormWindowState.Maximized;
}