Question

I need help in unifying size of elements in stackpanel

 void MainPageLoaded(object sender, RoutedEventArgs e)
    {
        var random = new Random();

        for (var i = 0; i < 5; i++)
        {
            var grid = new Grid();

            var border = new Border()
                             {
                                 Height = random.Next(50, 150),
                                 Width = random.Next(50, 150),
                                 Margin = new Thickness(10),
                                 BorderBrush = new SolidColorBrush(Colors.White),
                                 BorderThickness = new Thickness(1)
                             };

            grid.Children.Add(border);

            imageBoxesStackPanel.Children.Add(grid);
        }

var h = imageBoxesStackPanel.Children.Max(n => n.DesiredSize.Height);

what I am trying to achieve is to find max height and max width of each grid in stackpanel and apply it to all of them. The problem is that desired size is always wrong.

Answer 1

You can only do this in a custom way after a measure/arrange pass, before that the sizes won’t be visible.
After that (in the OnLoaded event, which you have), you can use the ActualHeight and ActualWidth of the grids.

In short:

var h = imageBoxesStackPanel.Children.Max(n => n.ActualHeight);

This is however bad for performance and will trigger another layout pass.

Remarks:
In WPF the best solution would be a SharedSizeGroup or a UniformGrid. This is not implemented in Silverlight, but there are people who have implemented it.