Change the margins of an element that is within a Grid by XAML and programmatic code : Margin « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. Margin

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="WpfApplication1.Window1"
    Title="Dynamically Change Margin Property Sample">
  <DockPanel Background="White">

    <TextBlock DockPanel.Dock="Top" FontSize="24" FontWeight="Bold">Grid Margin Property Sample</TextBlock>
        <Border Border.Background="LightSteelBlue" Border.BorderThickness="2" Border.BorderBrush="Black" DockPanel.Dock="Top">
            <Grid Name="grid1" Height="400">
              <Grid.ColumnDefinitions>
                <ColumnDefinition/>
              </Grid.ColumnDefinitions>
              <Grid.RowDefinitions>
                <RowDefinition/>
              </Grid.RowDefinitions>
                <TextBlock Name="text1" HorizontalAlignment="Center" Grid.Column="0" Grid.Row="0">Some Text.</TextBlock>
          </Grid>
        </Border>
        <Grid HorizontalAlignment="Center" Width="300" DockPanel.Dock="Top">
        <Grid.RowDefinitions>
          <RowDefinition/>
          <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
          <ColumnDefinition Width="Auto"/>
          <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
              <ListBox Grid.Row="0" Grid.Column="1" Width="50" Height="50" VerticalAlignment="Top" SelectionChanged="ChangeMargin">
                  <ListBoxItem>10</ListBoxItem>
                  <ListBoxItem>20</ListBoxItem>
                  <ListBoxItem>30</ListBoxItem>
                  <ListBoxItem>40</ListBoxItem>
                  <ListBoxItem>50</ListBoxItem>
                  <ListBoxItem>60</ListBoxItem>
                  <ListBoxItem>70</ListBoxItem>
                  <ListBoxItem>80</ListBoxItem>
                  <ListBoxItem>90</ListBoxItem>
                  <ListBoxItem>100</ListBoxItem>
              </ListBox>
          </Grid>
      </DockPanel>        
</Window>
//File:Window.xaml.cs


using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Navigation;


namespace WpfApplication1
{
  public partial class Window1 : Window
  {
    public void ChangeMargin(object sender, SelectionChangedEventArgs args)
    {
      ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
            ThicknessConverter myThicknessConverter = new ThicknessConverter();
            Thickness th1 = (Thickness)myThicknessConverter.ConvertFromString(li.Content.ToString());
            text1.Margin = th1;
            String st1 = (String)myThicknessConverter.ConvertToString(text1.Margin);
            Console.WriteLine("Margin: " + st1);
    }
  }
}

24.60.Margin
	24.60.1.	No margin
	24.60.2.	The same margin on all four sides
	24.60.3.	Margin: Left,Top,Right,Bottom
	24.60.4.	Set margins, by changing any existing property value for the margin in code-behind with Thickness class
	24.60.5.	Change the margins of an element that is within a Grid by XAML and programmatic code