I am following prism to build wpf application. In my application, there is a helper class library where I defined resources and styles which is going to be used by multiple class libraries in the solution.
But I am getting error when I try to set a resource to Style attribute of a window. The window is in differnt class library as of a resource.
The error that I am getting is :
Cannot find resource named '{resourceName}'. Resource names are case sensitive. Error at object 'MyWindow' in markup file
I used the following code but it is not working
<Window x:Class="Class1" Style="{StaticResource resourceName}">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/classlibrary;component/Dictionary/resource1.xaml" /> </ResourceDictionary.MergedDictionaries>
< /ResourceDictionary>
< /Window.Resources>
</Window>
You need to use the DynamicResource markup extension. The reason for this is because the external ResourceDictionary you import is declared in your xaml after the style is set for your Window. A working example of setting a Window's style with a style defined in a referenced class library is below:
The "MainWindow" xaml:
<Window x:Class="WpfApplication3.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
Style="{DynamicResource TestStyle}">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary
Source="pack://application:,,,/ClassLibrary1;component/Styles.xaml">
</ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid>
</Grid>
</Window>
The ResourceDictionary (defined in a file named Styles.xaml) in a class library:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style x:Key="TestStyle" TargetType="Window">
<Setter Property="Background">
<Setter.Value>
<SolidColorBrush Color="Green"></SolidColorBrush>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
You can use a pack URL to get a resource dictionary from another assembly. Check this thread.
Here is an example of a resource dictionary read from a Common assembly:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/Common;component/styles.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Related
I'm having trouble referencing a xaml resource dictionary file, leading to a runtime error saying 'resource x can't be found' when referring to a ResourceDictionary inside of . But using the Window.Resources node instead works.
working code:
<Window.Resources>
<ResourceDictionary Source="Resources\Template_1.xaml">
</ResourceDictionary>
</Window.Resources>
my malfunctioning code:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resources\Template_1.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
My problem is I need the dictionary in application scope.
I'm accessing it as StaticResource and the build action of Template_1 is set as 'Page'
Any suggestions?
Edit:
this is the structure of Template_1.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:self="clr-namespace:Application_1"
>
<ControlTemplate x:Key="dict_TabContent" x:Shared="true" >
<DockPanel>
...
</DockPanel>
</ControlTemplate>
</ResourceDictionary>
I created a theme in my project1 and referenced the theme.xaml in the app.xaml. the effect is the all projects gets the same theme within the solution.
What is the simplest way to apply a theme.xaml to a specified project, i.e. only to project1 but not project2?
I know I can reference the theme.xaml in each WFP form within project1 using
<Window.Resources>
<ResourceDictionary Source="/Project1;component/Themes/Customized.xaml" />
</Window.Resources>
But that is a little bit hard to maintain if I want to change the theme for the project. What I am looking for is something like project.xaml that behave like app.xaml, only the scope is to the current project. that way I can reference the theme.xaml in one place for the specified project (but not other projects).
Is that possible?
Thanks in advance.
Create a project theme resource dictionary and put reference to FooTheme.xaml into it.
In all your windows of the project, put reference to ProjectTheme.xaml.
This way, in order to change the theme of the project, you'll need to modify only one line.
Code:
FooTheme.xaml (sample theme)
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style TargetType="Button">
<Setter Property="Background" Value="Blue"/>
</Style>
</ResourceDictionary>
ProjectTheme.xaml (project theme)
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ResourceDictionary.MergedDictionaries>
<!-- In order to modify the project's theme, change this line -->
<ResourceDictionary Source="FooTheme.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
MainWindow.xaml (sample project window)
<Window x:Class="So17372811ProjectTheme.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="ProjectTheme.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid>
<Button Content="Click me!"/>
</Grid>
</Window>
I'm trying to apply the ExpressionDark theme from the Windows Presentation Foundation (WPF) CodePlex project.
I have added the file ExpressionDark.xaml in a Themes subfolder, and changed my App.xaml file to reference this file :
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary
Source="Themes/ExpressionDark.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
When I run the program, the styles are applied to all controls but not the window itself. The window's background remains white. What I understand is that the style applies to Window class, but not to derived class.
To workaround this issue, I've try to create a new style in my app.xaml file, in order to inherits the Windows style for my custom window class :
<Application.Resources>
<ResourceDictionary>
<Style
TargetType="{x:Type local:MainWindow}"
BasedOn="{StaticResource {x:Type Window}}" />
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary
Source="Themes/ExpressionDark.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
The result is strictly identical.
I've also try the advise from WPF: Adventures in Theming (Part 2). I added to my window definition :
<Window
x:Class="MyProject.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm="clr-namespace:MyProject.ViewModel"
Title="MainWindow"
Height="350"
Width="525"
Style="{DynamicResource {x:Type Window}}" />
No more success.
What is missing?
PS: don't know if it matters, but my window's child is a Grid.
Specify Background using dynamic resource in the Window XAML
<Window x:Class="HellowWorld.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Hellow World" Height="614" Width="821"
Background="{DynamicResource WindowBackgroundBrush}">
The last time i checked there was no Window style in the theme.
in order to clean up my code, I'm trying to split my app.xaml into seperate resource dictionaries. This works at runtime, but not at design time:
snipped in app.xaml
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/;component/Theme/Colors.xaml" />
<ResourceDictionary Source="/;component/Theme/Styles.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Colors.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<SolidColorBrush x:Key="backgroundBrush" Color="Gold"/>
</ResourceDictionary>
Styles.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style TargetType="StatusBar">
<Setter Property="Background" Value="{StaticResource backgroundBrush}" />
</Style>
</ResourceDictionary>
Snipped of MainWindow.xaml
<Window x:Class="test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="test" Width="800" Height="600" >
<StatusBar Name="statusBar" DockPanel.Dock="Bottom">
<StatusBarItem Content="{Binding statusMessage}" />
</StatusBar>
DesignView gives the error:
Error 8 '{DependencyProperty.UnsetValue}' is not a valid value for property 'Background'. C:\Daten\DotNet\test\test\MainWindow.xaml 123
If I put backgroundBrush directly into app.xaml like so:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/;component/Theme/Colors.xaml" />
<ResourceDictionary Source="/;component/Theme/Styles.xaml" />
<ResourceDictionary>
<SolidColorBrush x:Key="backgroundBrush" Color="Gold"/>
</ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
DesignView has no problems.
So is there a way to tell DesignView where to find backgroundBrush, if this brush is placed into a seperate resource dictionary?
Thats the problem with StaticResource isnt it. It needs the resource key resolved explicitly using shared \ merged \ direct resource dictionaries hierarchically up.
There are two options...
merge Colors.xaml dictionary in Styles.xaml
OR
in Styles.xaml refer the bursh using DynamicResource.
In case Resources are in different assemblies than that where MainWindow resides and the one dictionary is refering to the other dictionary. In that case reference is not resolved. This bug is already reported at Microsoft site in case your target framework is 4.0. However they have provided a workaround for it. Simply add the empty style in your Resource dictionaries and it will work fine like this -
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/;component/Theme/Colors.xaml" />
<ResourceDictionary Source="/;component/Theme/Styles.xaml" />
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type Window}"/>
</ResourceDictionary>
</Application.Resources>
For further refernce please look at this link - https://connect.microsoft.com/VisualStudio/feedback/details/555322/global-wpf-styles-are-not-shown-when-using-2-levels-of-references#details
Try
{StaticResource ApplicationPageBackgroundThemeBrush}
for your status bar background value
I Have a ResourceDictionary Generic.xaml which consists of a set of other resource dictionaries, this is achieved by merging dicionaries. If no resources other than merged dictionaries are defined in my Generic.xaml, during the runtime no styles gets applied.
However if I define any styles in the Gerneric.xaml all starts to work properly.
So the example below doesn't work (this is from my Generic.xaml)
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/Resources;component/ResourceDictionaries/CommonControls/CommonControlsResources.xaml"/>
</ResourceDictionary.MergedDictionaries>
<!--<Style TargetType="{x:Type ToolTip}"/>-->
And here is the working version:
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/Resources;component/ResourceDictionaries/CommonControls/CommonControlsResources.xaml"/>
</ResourceDictionary.MergedDictionaries>
<Style TargetType="{x:Type ToolTip}"/>
Why is that happening?
Edit:
To pin point the problem I have created a sample solution. So the structure of the project is following:
ProjectA WPF Windows Application
ProjectC Class Library, containing styles which are share among all project in the solution folder.
Here is the ProjectA:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/ProjectC;component/Themes/ThemeZ.xaml"/>
</ResourceDictionary.MergedDictionaries>
<!--<Style TargetType="{x:Type ToolTip}"/>-->
</ResourceDictionary>
<Application x:Class="MergedResourceDictionaryIssue.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Themes/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
<Window x:Class="MergedResourceDictionaryIssue.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Button/>
</Grid>
</Window>
Here is the ProjectC:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<!-- Styles for all our buttons, let make them all red squares -->
<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid Width="50"
Height="50"
Background="Red" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
And again if I uncomment the code in the ResourceDictionary project renders as expected, but otherwise the resource dictionary is simply ignored.
According to me, a Dictionary can only contain :
- merged dictionaries
- OR styles
Edit : They are discussing about it here It's a "known" issue and the trick that you used is the currently workaround.