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FrameworkElement.Resources Property

Gets or sets the locally-defined resource dictionary.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)

public ResourceDictionary Resources { get; set; }

XAML Values


One or more object elements, each of which defines a resource. Each resource property element within each ResourceDictionary must have a unique value for the x:Key Attribute, which serves as the unique key when values are retrieved from the ResourceDictionary.

Property Value

Type: System.Windows.ResourceDictionary
The current locally-defined dictionary of resources, where each resource can be accessed by key.

Resource dictionaries that can be defined completely or partially in Extensible Application Markup Language (XAML) are typically created as a property element, and are typically on the root element for any individual page or for the application. Placing the resource dictionary at this level makes it easier to find from individual child elements in the page (or from any page, in the application case). In most application scenarios, we recommend that styles be defined as object elements within a resource dictionary, or be defined as external resources so that the entire style resource can be self-contained (this approach helps separate designer responsibilities from developer responsibilities by separating the physical files that need to be edited).

Note that this property returns only the resource dictionary declared directly within that element. This is different than the actual resource lookup process, where a child element can access any of the resources defined in each parent element, searching recursively upwards.

Resources can also be referenced by code from within the collection, but be aware that resources created in XAML will definitely not be accessible until after Loaded is raised by the element that declares the dictionary. In fact, resources are parsed asynchronously and not even the Loaded event is an assurance that you can reference a XAML defined resource. For this reason you should generally only access XAML defined resources as part of run-time code, or through other XAML techniques such as styles or resource extension references for attribute values. When you access resources through code, it is essentially equivalent to a DynamicResource reference made from XAML.

The underlying ResourceDictionary supports the methods required to add, remove or query resources from within the collection by using code. The Resources property is settable to support the scenario of completely replacing the resources collection of an element to be a new or different ResourceDictionary.

Notice that the XAML syntax shown does not include an element for the ResourceDictionary. This is an example of implicit collection syntax; a tag representing the collection element can be omitted. The elements that are added as items to the collection are specified instead. For more information about implicit collections and XAML, see XAML Syntax Terminology. One case where a ResourceDictionary is still specified explicitly as an element is if you are introducing a merged dictionary, in which case there are typically no child elements for that ResourceDictionary. For details, see Merged Resource Dictionaries.

This example shows how to define a resource and reference it by using an attribute in Extensible Application Markup Language (XAML).

The following example defines two types of resources: a SolidColorBrush resource, and several Style resources. The SolidColorBrush resource MyBrush is used to provide the value of several properties that each take a Brush type value. The Style resources PageBackground, TitleText and Label each target a particular control type. The styles set a variety of different properties on the targeted controls, when that style resource is referenced by resource key and is used to set the Style property of several specific control elements defined in XAML.

Note that one of the properties within the setters of the Label style also references the MyBrush resource defined earlier. This is a common technique, but it is important to remember that resources are parsed and entered into a resource dictionary in the order that they are given. Resources are also requested by the order found within the dictionary if you use the StaticResource Markup Extension to reference them from within another resource. Make sure that any resource that you reference is defined earlier within the resources collection than where that resource is then requested. If necessary, you can work around the strict creation order of resource refererences by using a DynamicResource Markup Extension to reference the resource at runtime instead, but you should be aware that this DynamicResource technique has performance consequences. For details, see Resources Overview.

<Page Name="root"
    <SolidColorBrush x:Key="MyBrush" Color="Gold"/>
    <Style TargetType="Border" x:Key="PageBackground">
      <Setter Property="Background" Value="Blue"/>
    <Style TargetType="TextBlock" x:Key="TitleText">
      <Setter Property="Background" Value="Blue"/>
      <Setter Property="DockPanel.Dock" Value="Top"/>
      <Setter Property="FontSize" Value="18"/>
      <Setter Property="Foreground" Value="#4E87D4"/>
      <Setter Property="FontFamily" Value="Trebuchet MS"/>
      <Setter Property="Margin" Value="0,40,10,10"/>
    <Style TargetType="TextBlock" x:Key="Label">
      <Setter Property="DockPanel.Dock" Value="Right"/>
      <Setter Property="FontSize" Value="8"/>
      <Setter Property="Foreground" Value="{StaticResource MyBrush}"/>
      <Setter Property="FontFamily" Value="Arial"/>
      <Setter Property="FontWeight" Value="Bold"/>
      <Setter Property="Margin" Value="0,3,10,0"/>
    <Border Style="{StaticResource PageBackground}">
        <TextBlock Style="{StaticResource TitleText}">Title</TextBlock>
        <TextBlock Style="{StaticResource Label}">Label</TextBlock>
        <TextBlock DockPanel.Dock="Top" HorizontalAlignment="Left" FontSize="36" Foreground="{StaticResource MyBrush}" Text="Text" Margin="20" />
        <Button DockPanel.Dock="Top" HorizontalAlignment="Left" Height="30" Background="{StaticResource MyBrush}" Margin="40">Button</Button>
        <Ellipse DockPanel.Dock="Top" HorizontalAlignment="Left" Width="100" Height="100" Fill="{StaticResource MyBrush}" Margin="40" />

For the complete sample, see Defining a Resource Sample.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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