I have a project which contains the entry point of my application and a ResourceDictionary. In a first time, these files were located at the root of the project. At this time, I could see all the components (button for exemple) modified by the style in the designer of xaml files in other projects.
Now, I have subfolders like this : src/launcher which contains my entry point and src/styles which contains my ResourceDictionary. But now, the components are not styled in the designer of VS2010. The program compiles and works well, but the designer doesn't work. I get the "Cannot find the resource ..." error constantly.
The code of my main xaml file is :
<Application x:Class="MANAGER.Program"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Startup="Application_Startup">
<Application.Resources>
<ResourceDictionary Source="../Styles/Style.xaml"></ResourceDictionary>
</Application.Resources>
</Application>
Why the designer doesn't work ?
Your code should look this way in order to use subdirectories out of your application root directory:
<Application x:Class="MANAGER.Program"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Startup="Application_Startup">
<Application.Resources>
<ResourceDictionary Source="pack://siteoforigin:,,,../Styles/Style.xaml"></ResourceDictionary>
</Application.Resources>
</Application>
It might have something to do with the format of the "Source" attribute.
The format needs to be a Pack URI like "pack://siteoforigin:,,,/SiteOfOriginFile.xaml"
Have a look at these documentations in MSDN:
ResourceDictionary.Source Property
Packet URIs in WPF
Related
Problem: The resource dictionary does not load at run time, but displays correctly in the designer. If I change the color in Dark.xaml to green, I can notice in the designer that my Window background (Layout.xaml) turns green. but when I compile the project in Debug mode, the background is just transparent !!
What I have tried in App.xaml:
<Applicationxmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:StackOverflow" x:Class="StackOverflow.App">
<Application.Resources>
<ResourceDictionary Source="#"/>
</Application.Resources>
</Application>
And:
<Applicationxmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:StackOverflow" x:Class="StackOverflow.App">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="#"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
In the source value, I tried these 3 possibilities:
Theme/Dark.xaml
/StackOverflow;component/Theme/Dark.xaml
pack://application:,,,/StackOverflow;component/Theme/Dark.xaml
App.xaml.cs:
Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;
Window Window = Server.Status() is StatusCode.OK ? new Layout() : new Login();
Window.ShowDialog();
Current.Shutdown();
Dark.xaml:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="StackOverflow.Theme.Dark" xmlns:local="clr-namespace:StackOverflow.Theme">
<SolidColorBrush x:Key="Layout.Background">Red</SolidColorBrush>
</ResourceDictionary>
Dark.xaml: File Properties
Build Action: Page
Copy to Output Directory: Do not copy
Custom Tool: XamlIntelliSenseFileGenerator
Custom Tool Namespace:
Dark.cs:
namespace StackOverflow.Theme {
public partial class Dark : ResourceDictionary {
public Dark(){
InitializeComponent();
}
}
}
Dark.cs: File Properties
Build Action: Compile
Copy to Output Directory: Do not copy
Custom Tool:
Custom Tool Namespace:
Note: These two files (Dark.xaml / Dark.cs) are nested using the File Nesting extension (Keith Wilson).
Layout.xaml:
<Window
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:StackOverflow.XAML"
x:Class="StackOverflow.XAML.Layout"
Background="{DynamicResource Layout.Background}"
AllowsTransparency="True"/>
Project File Structure:
XAML
Layout.xaml
Theme
Dark.xaml
App.xaml
Other information:
Solution Configuration: Debug
Solution Platform: x64
Microsoft Visual Studio Community 2019 v16.7.3
Update:
For some reason the problem reappeared with the Application StartUpUri, if you noticed that I didn't use this attribute because I have to verify the user's login before giving them access to the main window. So behind the code in App.xaml.cs I call Login.ShowDialog() and Layout.ShowDialog(). After setting this attribute to Layout Window, I can notice that the application is consuming the resources defined under Dark.cs, so if I change this line:
<SolidColorBrush x:Key="Layout.Background">Lime</SolidColorBrush>
The layout background changed at runtime to the color Lime, but I'm wondering if it is possible to use the same resources defined in App.xaml in all project windows, in my case StartUpUri will be Login.xaml, and under Login if the user info is correct I can prevent this window from showing and show my layout window. but the question here is whether this resource named "Layout.Background" can be used in both windows?
I got the idea that the app resource dictionary defined in App.xaml is like a super global resource, which I can use whenever I want. Is it correct? because this result does not seem to support it.
I work on C# WPF
I have more than one DataGridView all of them has the same style (Background, row width, column height...etc) but each one has different numbers of columns
So my question is Can I make one style for these grids and share between them?
like css in Web
You can create a resource file in wpf where you can store all your style and template. Don't confuse it with the resource file in the Properties directory. You can add a Resource file by right clicking your project in visual studio and adding an existing xaml file or creating a new one.
After that, define all your styles and templates. Then you only need to include it in your available resources
<Application
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="UsingResourceDictionaries.App">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="myDirectory/myDictionary.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Don't forget to give a key to each one of your style and template, so that you can use them in your User controls
Let's start from the beggining. I have an app in wpf which uses my custom window style. I'm defining this custom style in app.xaml like below:
<Application x:Class="GeoLocations.Test.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="ThemedWindowStyle.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Nowadays there came a requirement that i need to build this application as dll and later on call it from Windows.Forms application. Obviously the app.xaml code is not being fired since this is not start up application anymore. Is there any way to load it ?
I tried to manually register this Dictionary in code behind but with no success. I also tried to change Build Action from "Page" to "Content" and "Do not copy" to "Copy if newer" but it is giving me different exception:
'Failed to create a 'Type' from the text 'local:ThemedWindow" with inner exception "{"Type reference cannot find type named '{clr-namespace:GeoLocations.Test}ThemedWindow'."}
(this exception is beeing fired inside ResourceDictionary so it's loaded but why it can't find the type ?).
ThemedWindow is a type which inherits from Window and later on all my windows inherits from ThemedWindow instead of Window
I have no idea how to solve this issue. Anyone got some knowledge to help ?
Ok, so i resolved this be adding my ResourceDictionary in code behind in my ThemedWindow Constructor. Like below:
var rd = new ResourceDictionary();
rd.Source = new Uri("pack://application:,,,/GeoLocations Screens;component/ThemedWindowStyle.xaml");
Resources.MergedDictionaries.Add(rd);
I have separated libraries for my applications and I want to put ResourceDictionary to keep my default styles in one place.
In my project mylib that is build to mylib.dll i have Styles/General.xaml:
<ResourceDictionary
x:Class="gjdapi.Style.General"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:System="clr-namespace:System;assembly=mscorlib">
I'm referencing it in my App.xaml:
<Application.Resources>
<ResourceDictionary x:Key="General">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/mylib;component/Styles/General.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
Build for Styles/General.xaml is set to Page.
I found some tips here:
Use an External ResourceDictionary in a WindowsPhone 7 app
xClassNotDerivedFromElement error when adding Code Behind to Resource Dictionary in silverlight
Error using ResourceDictionary in Silverlight
but nothing seems to work i always hit this exception:
Message "Parser internal error: Object writer 'xClassNotDerivedFromElement'. [Line: 15 Position: 32]" string
Please tell me what am I missing?
As lisp suggested ResourceDictionary can't have code behind so line x:Class="gjdapi.Style.General" should be removed
In my WPF application, user can select a command by doing a right click. Now, I have created a button and want to associate this method to the button.
What I have done so far:
In the XAML file I have:
<Button Content="Run Compare" Command="{x:Static RunCompare_Exectued}"></Button>
Then in ResourceDirectory section I am trying to give a reference to my file holding the method as
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:myMethods="**Nothing Comes up here!!!**"
>
Usually I would hold Ctrl and hit the space bar but nothing shows up then I tried to type clr-namespace:FileNameConatiningMethod ... yet I'm getting error as:
Undefined CLR namespace. The 'clr-namespace' URI refers to a namespace 'Application.Commands' that is not included in the assembly.
Any help will be appreciated.
Thanks.
EDIT:
I have access to one of the files which has method A and B, however, I don't have access to method C and D in a different source file. Shouldn't this be OK by adding Namespace in the root tag of the XAML file?
let's say my namespace is ABC so I have:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:s="clr-namespace:ABC">
Please check your approach against this one I found on MSDN.
Please also check that your code is compiling and there are no assembly reference conflicts.
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib">
<!-- String resource that can be localized -->
<system:String x:Key="localizedMessage">en-US Message</system:String>
</ResourceDictionary>
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="StringResources.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>