代碼中的Silverlight參考XAML代碼

Question

在Silverlight5中，如何引用用戶控件資源 - 來自button_click事件的圖釋？

我可以很好地訪問對象，如果我在後面的代碼中構建它，然後以這種方式進行數據綁定，但是使用XAML方法我會得到一些更好的工具。示例來到from Ch16

private void Button_Click_1(object sender, RoutedEventArgs e) 
     { 
      // **HERE how do I reference the XAML emoticon object 

      //emoticon.Name = "Smiley face2"; 
      //emoticon.Icon = new BitmapImage(new Uri("icons/happy.png", UriKind.RelativeOrAbsolute)); 
     } 

。

<UserControl x:Class="EmoticonExample.MainPage" 
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:local="clr-namespace:EmoticonExample" 
      mc:Ignorable="d" 
      d:DesignHeight="300" 
      d:DesignWidth="400"> 
    <UserControl.Resources> 
     <local:Emoticon x:Key="emoticon" 
         Name="SmileyFace" 
         Icon="icons/happy.png" /> 
    </UserControl.Resources> 

    <Grid x:Name="LayoutRoot" 
      Margin="10" 
      Background="White" 
      DataContext="{StaticResource emoticon}"> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="Auto" /> 
      <RowDefinition Height="Auto" /> 
     </Grid.RowDefinitions> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition /> 
      <ColumnDefinition /> 
     </Grid.ColumnDefinitions> 

     <TextBlock Text="Name:" /> 
     <TextBlock Text="Image:" Grid.Column="1" /> 

     <TextBox Name="myTextBox" Text="{Binding Name, Mode=TwoWay}" Grid.Row="1" /> 
     <Image Name="myImage" Source="{Binding Icon}" Stretch="None" Grid.Row="1" Grid.Column="1" /> 

     <Button Content="Button" HorizontalAlignment="Left" Margin="10,116,0,-92" Grid.Row="1" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/> 
    </Grid> 

</UserControl> 

Answer 1

名用戶控件

<UserControl x:Class="EmoticonExample.MainPage" 
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:local="clr-namespace:EmoticonExample" 
      mc:Ignorable="d" 
      x:Name="Example" 
      d:DesignHeight="300" 
      d:DesignWidth="400"> 

</UserControl 

然後在後面的代碼中引用它：

var emoticon = Example.Resources["emoticon"] as Emoticon; // Im not sure of your data type