Backport the fix to prop precedence from .NET to Framework (#1171)

* Update page4.xaml * Update page4.xaml * Add snippet * Change reference
2026-09-04 00:56:03 +02:00 · 2021-10-21 12:35:11 -07:00
parent 700f725681
commit cb4acd590a
10 changed files with 350 additions and 22 deletions
@@ -23,7 +23,7 @@ ms.assetid: 1fbada8e-4867-4ed1-8d97-62c07dad7ebc
 ## Dependency Properties Might Be "Set" in Multiple Places  
 The following is example [!INCLUDE[TLA2#tla_xaml](../../../includes/tla2sharptla-xaml-md.md)] where the same property (<xref:System.Windows.Controls.Control.Background%2A>) has three different "set" operations that might influence the value.  
  
- [!code-xaml[PropertiesOvwSupport#DPPrecedence](~/samples/snippets/csharp/VS_Snippets_Wpf/PropertiesOvwSupport/CSharp/page4.xaml#dpprecedence)]  
+ :::code language="xaml" source="./snippets/dependency-property-value-precedence/xaml/MainWindow.xaml" id="DependencyPropertyValuePrecedence":::
  
 Here, which color do you expect will apply—red, green, or blue?  
  
@@ -0,0 +1,9 @@
+<Application x:Class="CodeSampleCsharp.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:CodeSampleCsharp"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace CodeSampleCsharp
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net5.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Update="Properties\Resources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,34 @@
+<Window x:Class="CodeSampleCsharp.MainWindow"
+    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"
+    mc:Ignorable="d"
+    Title="Dependency Property Value Precedence" Height="100" Width="300">
+    <!--<DependencyPropertyValuePrecedence>-->
+    <StackPanel>
+        <StackPanel.Resources>
+            <ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
+                <Border Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" 
+                        BorderBrush="{TemplateBinding BorderBrush}">
+                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </Border>
+            </ControlTemplate>
+        </StackPanel.Resources>
+
+        <Button Template="{StaticResource ButtonTemplate}" Background="Red">
+            <Button.Style>
+                <Style TargetType="{x:Type Button}">
+                    <Setter Property="Background" Value="Blue"/>
+                    <Style.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter Property="Background" Value="Yellow" />
+                        </Trigger>
+                    </Style.Triggers>
+                </Style>
+            </Button.Style>
+            Which color do you expect?
+        </Button>
+    </StackPanel>
+    <!--</DependencyPropertyValuePrecedence>-->
+</Window>
@@ -0,0 +1,48 @@
+using System.Windows;
+using System.Windows.Controls;
+
+namespace CodeSampleCsharp
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml.
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+
+            // <ProceduralPropertySet>
+            Button myButton = new();
+            myButton.Width = 200.0;
+            // </ProceduralPropertySet>
+
+            // <ProceduralPropertyGet>
+            double whatWidth = myButton.Width;
+            // </ProceduralPropertyGet>
+        }
+
+        // <DefineDependencyProperty>
+        public static readonly DependencyProperty IsSpinningProperty = DependencyProperty.Register(
+            "IsSpinning", typeof(bool),
+            typeof(MainWindow)
+            );
+
+        public bool IsSpinning
+        {
+            get => (bool)GetValue(IsSpinningProperty);
+            set => SetValue(IsSpinningProperty, value);
+        }
+        // </DefineDependencyProperty>
+    }
+
+    // <OverrideMetadata>
+    public class SpinnerControl : ItemsControl
+    {
+        static SpinnerControl() => DefaultStyleKeyProperty.OverrideMetadata(
+                typeof(SpinnerControl),
+                new FrameworkPropertyMetadata(typeof(SpinnerControl))
+            );
+    }
+    // </OverrideMetadata>
+}
@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace CodeSampleCsharp.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("CodeSampleCsharp.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+    }
+}
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
@@ -4,27 +4,30 @@
  x:Class="MyNamespace.MyCode"
  Loaded="BAQ"
 >
-  <StackPanel>
-    <!--<SnippetAPBasicUsage>-->
-    <DockPanel>
-      <CheckBox DockPanel.Dock="Top">Hello</CheckBox>
-    </DockPanel>
-    <!--</SnippetAPBasicUsage>-->
-    <Button Click="MakeANewThing">Make a new thing</Button>
    <!--<SnippetDPPrecedence>-->
-    <Button Background="Red">
-      <Button.Style>
-        <Style TargetType="{x:Type Button}">
-          <Setter Property="Background" Value="Green"/>
-          <Style.Triggers>
-            <Trigger Property="IsMouseOver" Value="True">
-              <Setter Property="Background" Value="Blue" />
-            </Trigger>
-          </Style.Triggers>
-        </Style>
-      </Button.Style>
-Click
-    </Button>
+    <StackPanel>
+        <StackPanel.Resources>
+            <ControlTemplate x:Key="ButtonTemplate" TargetType="{x:Type Button}">
+                <Border Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" 
+                        BorderBrush="{TemplateBinding BorderBrush}">
+                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
+                </Border>
+            </ControlTemplate>
+        </StackPanel.Resources>
+
+        <Button Template="{StaticResource ButtonTemplate}" Background="Red">
+            <Button.Style>
+                <Style TargetType="{x:Type Button}">
+                    <Setter Property="Background" Value="Blue"/>
+                    <Style.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter Property="Background" Value="Yellow" />
+                        </Trigger>
+                    </Style.Triggers>
+                </Style>
+            </Button.Style>
+            Which color do you expect?
+        </Button>
+    </StackPanel>
    <!--</SnippetDPPrecedence>-->
-  </StackPanel>
 </Canvas>