WPF

GridView grid = source.View as GridView;
if (grid == null)
{
    //Sorry, only for GridView views
    return;
}
foreach (GridViewColumn col in grid.Columns)
{
    //value of header is col.Header
}
foreach (Object item in source.Items)
{
    PropertyInfo[] dataFields = item.GetType().GetProperties();
    int i = 0;
    foreach (GridViewColumn col in grid.Columns)
    {
        try
        {
            //Get the name of field displayed on grid
            string strPath = ((Binding)col.DisplayMemberBinding).Path.Path;
            //Get the field value
            object propValue = GetValue(item, source.Items, strPath);
            //Value of cell is propValue
        }
        catch (Exception)
        {
        }
    }
}

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />
            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>
</Window>

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var button = new Button() { Content = "Newly added button" };

            var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
            switch (rnd.Next(3))
            {
                case 0:
                    button.Background = Brushes.BlueViolet;
                    break;
                case 1:
                    var style = new Style();
                    style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                    button.Style = style;
                    break;
            }

            stack.Children.Add(button);
        }
    }
}

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />
            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>


    <x:Code>
        <![CDATA[
            public Window1()
            {
                InitializeComponent();
            }

            private void Button_Click(object sender, RoutedEventArgs e)
            {
                var button = new Button() { Content = "Newly added button" };
                var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
                
                switch (rnd.Next(3))
                {
                    case 0:
                        button.Background = Brushes.BlueViolet;
                        break;
                    case 1:
                        var style = new Style();
                        style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                        button.Style = style;
                        break;
                }

                stack.Children.Add(button);
            }
        ]]>
    </x:Code>
</Window>

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />

            <x:Code>
                public Window1()
            {
                InitializeComponent();
            }

            private void Button_Click(object sender, RoutedEventArgs e)
            {
                var button = new Button() { Content = "Newly added button" };
                var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
                
                switch (rnd.Next(3))
            </x:Code>

            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>

    <x:Code>
                {
                    case 0:
                        button.Background = Brushes.BlueViolet;
                        break;
                    case 1:
                        var style = new Style();
                        style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                        button.Style = style;
                        break;
                }

                stack.Children.Add(button);
            }
    </x:Code>
</Window>