How to vertically auto size a winforms datagridview control, so that its rows are always visible

Question

I have a DataGridView that displays a limited number of rows, never more than 5. This DataGridViewis placed on a DataRepeater control so it's usually displayed many times on the screen. What I want to achieve is that all grids are resized to the size of their contents so they don't display scroll bars if 4 or 5 items are in them or take up extra vertical space if only 1 or 2 items are there.

The grids only contain text data. They are data bound controls, so they'll need to resize if the underlying data source changes (I guess the DataBindingComplete event would be suitable).

How may I achieve this? Is counting rows the best option? Thanks in advance.

Answer 1

Since your control is data-bound, I would set the Height property on the DataGridView to the sum of the heights of its rows (plus some margin) in the DataBindingComplete event:

private void dataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
    var height = 40;
    foreach (DataGridViewRow dr in dataGridView1.Rows) {
        height += dr.Height;
    }

    dataGridView1.Height = height;
}

Answer 2

I took hmqcnoesy's answer and expanded on it and created a function to also include the width. And to use on any grid.

Note: Set AutoSizeCells = AllCells on the grid.

    public static DataGridView SetGridHeightWidth(DataGridView grd, int maxHeight, int maxWidth)
    {
        var height = 40;
        foreach (DataGridViewRow row in grd.Rows)
        {
            if(row.Visible)
                height += row.Height;
        }

        if (height > maxHeight)
            height = maxHeight;

        grd.Height = height;

        var width = 60;
        foreach (DataGridViewColumn col in grd.Columns)
        {
            if (col.Visible)
                width += col.Width;
        }

        if (width > maxWidth)
            width = maxWidth;

        grd.Width = width;

        return grd;
    }