如何：將快取的項目當做筆刷使用
使用 BitmapCacheBrush 類別，有效率地重複使用所快取的元素。 若要快取元素，請建立 BitmapCache 類別的新執行個體，並將其指派給元素的 CacheMode 屬性。
範例
下列程式碼範例顯示如何重複使用所快取的元素。 所快取的元素是可顯示大型影像的 Image 控制項。 Image 控制項是使用 BitmapCache 類別來快取為點陣圖，而重複使用快取的方式是將其指派給 BitmapCacheBrush。 筆刷會指派給 25 個按鈕的背景，以顯示有效率的重複使用。
<Window x:Class="BitmapCacheBrushDemo.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Height="300" Width="300" >
<Window.Resources>
<RichTextBox x:Key="cachedRichTextBox" >
<RichTextBox.CacheMode>
<BitmapCache EnableClearType="True" RenderAtScale="1" SnapsToDevicePixels="True" />
</RichTextBox.CacheMode>
</RichTextBox>
<BitmapCacheBrush x:Key="cachedRichTextBoxBrush" Target="{StaticResource cachedRichTextBox}">
<BitmapCacheBrush.BitmapCache>
<BitmapCache EnableClearType="False" RenderAtScale="0.4" SnapsToDevicePixels="False" />
</BitmapCacheBrush.BitmapCache>
</BitmapCacheBrush>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button2" Grid.Column="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button3" Grid.Column="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button4" Grid.Column="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button5" Grid.Column="4" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button6" Grid.Row="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="1" Name="button7" Grid.Row="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="2" Name="button8" Grid.Row="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="3" Name="button9" Grid.Row="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="4" Name="button10" Grid.Row="1" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button11" Grid.Row="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="1" Name="button12" Grid.Row="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="2" Name="button13" Grid.Row="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="3" Name="button14" Grid.Row="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="4" Name="button15" Grid.Row="2" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button16" Grid.Row="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="1" Name="button17" Grid.Row="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="2" Name="button18" Grid.Row="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="3" Name="button19" Grid.Row="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="4" Name="button20" Grid.Row="3" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Name="button21" Grid.Row="4" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="1" Name="button22" Grid.Row="4" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="2" Name="button23" Grid.Row="4" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="3" Name="button24" Grid.Row="4" FontWeight="Bold" />
<Button Background="{StaticResource cachedRichTextBoxBrush}" Content="Button" Grid.Column="4" Name="button25" Grid.Row="4" FontWeight="Bold" />
</Grid>
</Window>
