How to: Use a FontSizeConverter Object
Example
This example shows how to create an instance of FontSizeConverter and use it to change a font size.
The example defines a custom method called changeSize that converts the contents of a ListBoxItem, as defined in a separate Extensible Application Markup Language (XAML) file, to an instance of Double, and later into a String. This method passes the ListBoxItem to a FontSizeConverter object, which converts the Content of a ListBoxItem to an instance of Double. This value is then passed back as the value of the FontSize property of the TextBlock element.
This example also defines a second custom method that is called changeFamily. This method converts the Content of the ListBoxItem to a String, and then passes that value to the FontFamily property of the TextBlock element.
This example does not run. For the complete sample, see Instantiating and Using a FontSizeConverter Object Sample.
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());
}
Public Sub changeSize(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
Dim myFontSizeConverter As System.Windows.FontSizeConverter = New System.Windows.FontSizeConverter()
text1.FontSize = CType(myFontSizeConverter.ConvertFromString(li.Content.ToString()), Double)
End Sub
Public Sub changeFamily(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
Dim li2 As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
text1.FontFamily = New System.Windows.Media.FontFamily(li2.Content.ToString())
End Sub