Force resize of DataGridView columns

Question

I've got a simple form with a DataGridView element on it. In the constructor the grid columns get added and the DataTable gets set. When I then call AutoResizeColumns() it doesn't resize the columns as it would when called by e.g. a button event. The code looks like this (simplified):

public MyDialog()
{
   InitializeComponent();
   dgv.Columns.AddRange(SomeClass.MyColumns);
   dgv.DataSource = SomeClass.Table;
   // This doesn't work:
   dgv.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);
}

AutoResizeColumns() works in general but not at that point. Btw, I need this to implement a behavior like it is requested/described here. Any ideas?

Answer 1

I had the same issue until I set the autosize mode:

dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;

Answer 2

Additionally, I believe the object needs to be VISIBLE before the resize is done... for some reason, the painting doesn't appear to happen as one would expect.