Expand C# propertygrid on show

Question

i have a question about property grid. when the form is shown i would like a group to be expand rather then collapsed. i have search a lot for that on the web and could not

Answer 1

These enumerator extensions allowed me to do everything I wanted.

public static class PropertyGridExtensions
{
    public static IEnumerable EnumerateGroups(this PropertyGrid propertyGrid)
    {
        if (propertyGrid.SelectedGridItem == null)
            yield break;

        foreach (var i in propertyGrid.EnumerateItems())
        {
            if (i.Expandable)
            {
                yield return i;
            }
        }
    }

    public static IEnumerable EnumerateItems(this PropertyGrid propertyGrid)
    {
        if (propertyGrid.SelectedGridItem == null)
            yield break;

        var root = propertyGrid.SelectedGridItem;
        while (root.Parent != null)
            root = root.Parent;

        yield return root;

        foreach (var i in root.EnumerateItems())
        {
            yield return i;
        }            
    }

    public static GridItem GetGroup(this PropertyGrid propertyGrid, string label)
    {
        if (propertyGrid.SelectedGridItem == null)
            return null;

        foreach (var i in propertyGrid.EnumerateItems())
        {
            if (i.Expandable && i.Label == label)
            {
                return i;
            }
        }

        return null;
    }

    private static IEnumerable EnumerateItems(this GridItem item)
    {
        foreach (GridItem i in item.GridItems)
        {
            yield return i;

            foreach (var j in i.EnumerateItems())
            {
                yield return j;
            }
        }
    }        
}