Use the FontSizeConverter class to convert the content of a ListBoxItem to a value that represents the size of a font. : ListBox Data « Windows Presentation Foundation « C# / CSharp Tutorial

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

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="FontSizeConverter_Csharp.Window1"
    Title="FontSizeConverter Sample">
<StackPanel>
        <TextBlock Name="text1" TextWrapping="Wrap" Height="300" Width="500">
            this is a test
        </TextBlock>
    <ListBox Grid.Column="1" Grid.Row="1" VerticalAlignment="Top" Height="50" Margin="10,0,0,0" SelectionChanged="changeSize">
        <ListBoxItem>5</ListBoxItem>
        <ListBoxItem>8</ListBoxItem>
        <ListBoxItem>11</ListBoxItem>
        <ListBoxItem>14</ListBoxItem>
        <ListBoxItem>17</ListBoxItem>
        <ListBoxItem>20</ListBoxItem>
        <ListBoxItem>23</ListBoxItem>
        <ListBoxItem>26</ListBoxItem>
        <ListBoxItem>29</ListBoxItem>
        <ListBoxItem>32</ListBoxItem>
    </ListBox>
    <ListBox Grid.Column="3" Grid.Row="1" VerticalAlignment="Top" Height="50" Margin="10,0,0,0" SelectionChanged="changeFamily">
      <ListBoxItem>Arial</ListBoxItem>
      <ListBoxItem>Courier New</ListBoxItem>
      <ListBoxItem>Tahoma</ListBoxItem>
      <ListBoxItem>Times New Roman</ListBoxItem>
      <ListBoxItem>Verdana</ListBoxItem>
    </ListBox>      
   
  </StackPanel>        
</Window>
//File:Window.xaml.cs


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

namespace FontSizeConverter_Csharp
{
  public partial class Window1 : Window
  {
        public void changeSize(object sender, SelectionChangedEventArgs args)
        {
      ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
      FontSizeConverter myFontSizeConverter = new FontSizeConverter();
      text1.FontSize = (Double)myFontSizeConverter.ConvertFromString(li.Content.ToString());
        }

    public void changeFamily(object sender, SelectionChangedEventArgs args)
    {
      ListBoxItem li2 = ((sender as ListBox).SelectedItem as ListBoxItem);
            text1.FontFamily = new System.Windows.Media.FontFamily(li2.Content.ToString());
        }
  }
}

24.32.ListBox Data
	24.32.1.	Convert the contents of a ListBoxItem to an instance of GridLength by using GridLengthConverter
	24.32.2.	Use the FontSizeConverter class to convert the content of a ListBoxItem to a value that represents the size of a font.
	24.32.3.	Display Bounded objects onto ListBox
	24.32.4.	Use DataTemplate in ListBox
	24.32.5.	ListBox binds to the people collection, and sets the DataTemplate to use for displaying each item
	24.32.6.	Without specifying a DataTemplate, the ListBox displays a list of names.
	24.32.7.	Convert contents of a ListBoxItem to an instance of Thickness by using the ThicknessConverter
	24.32.8.	Convert contents of a ListBoxItem to an instance of Thickness by using the BrushConverter
	24.32.9.	DataTrigger, ListBox and user object
	24.32.10.	Select Product Page Function
	24.32.11.	Create ListBox and Add string as the ListBoxItem
	24.32.12.	ListBox of Color Values
	24.32.13.	ListBox of Color Shapes