Get Json elements and generate UI Controls Dynamic in WPF C#

Question

I was trying create some UI elements in my WPF application. I took this example: WPF: How to dynamically Add Controls in dynamically created WPF Window as reference. But, my interface was a mess. You can see by image below:

Actual FORM

This is the code that got the JSON:

        public MainWindow()
    {
        InitializeComponent();
        db = new DbItens("DBItens");

        using (var webClient = new WebClient())
        {
            var get = JsonConvert.DeserializeObject<RootJson>(Encoding.UTF8.GetString(webClient.DownloadData(url)));
            foreach (var item in get.Itens)
            {

                buildForm(item, prox);
                prox++;
            }
        }
    }

And this is my buildForm method:

 private void buildForm(Item item, int prox)
    {
        stkSPanel.Orientation = Orientation.Vertical;

        stkSPanel.Children.Add(new Label
        {
            Content = item.Nome,
        });
        stkSPanel.Children.Add(new TextBlock
        {
            Text = item.Descricao,
        });

        Image img = new Image
        {
            Height = 100,
            Width = 100

        };
        img.Source = new BitmapImage(new Uri(item.Foto));
        StackPanel panel = new StackPanel();
        panel.Orientation = Orientation.Horizontal;
        panel.Margin = new Thickness(10);
        panel.Children.Add(img);


        stkSPanel.Children.Add(new Button {Content = panel });
    }

How i can format this elements?

Note: My code need to be that way (not directly implemented in XAML), because i will get new items from database too (I only have the stackPanel in XAML), and i need show then by heapsort algorithm.

XAML Code:

<Window x:Class="BlueGearAPP.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:BlueGearAPP"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525" ScrollViewer.CanContentScroll="True" ScrollViewer.HorizontalScrollBarVisibility="Auto">
<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">

    <StackPanel x:Name="stkSPanel"></StackPanel>
</ScrollViewer>

I want something like this:

Expected Form

ANSWER

Talking with sumodh-s i've been changed my panels orientation to vertival, and my UI controls to horizontal with alignment in center. And now it's worked fine.