I have a resource dictionary with a bunch of styles that I am linking too in my user controls like so:
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="../Theme/ThemedResources.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
This all works fine during runtime.
However I get a recurring problem in that one of the styles in the resource dictionary 'cannot be found' in whichever user control is the most recent, until the solution is rebuilt. This error will then appear again after I stop the debugging process, and again will disappear with a rebuild.
I don't think this is linked to a specific style, as when I add new styles the style that can't be found seems to change.
Any ideas how I can stop this from happening?
You have used a Relative URI, so it will looks for your resource file in a somewhere that you used your UserControl. It can't find you resource file because your resource file is not in the AbsolutePath.
AbsolutePath = CurrentPath (r.g Where you used your UserControl) + RelativePath
so Use an AbsolutePath:
<ResourceDictionary Source="pack://application:,,,/{YourAssemblyName};component/Theme/ThemedResources.xaml" />
Related
In my WinUI 3 application, I am trying to use a ResourceDictionary that is located in another project.
Lets say the referenced project is ResourceTestLib and this library project has a folder "Styles" which has a file "_Thickness.xaml".
In the app.xaml file of the main application, I tried these two approaches below the "Other merged dictionaries here" comment, but none of them seem to work, i.e. that app crashes on startup with that message "Cannot locate resource ...." message.
This is my app.xaml:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
<!-- Other merged dictionaries here -->
<ResourceDictionary Source="/ResourceTestLib;component/Styles/_Thickness.xaml"/>
<ResourceDictionary Source="pack://application:,,,/ResourceTestLib;component/Styles/_Thickness.xaml"></ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
When I hover over the respective line, Visual Studio shows a tooltip with "Path X not found" for the first referenced ResourceDictionary and a "Invalid characters in path" (probably because of "application:,,,") message for the second.
I suppose that that WinUI XAML might be different than WPF XAML in that respect? Or even that this is not supported yet?
Pack URIs are only used in WPF.
UWP and Win UI use the ms-appx URI scheme to refer to a file that resides in another assembly so try this:
<ResourceDictionary Source="ms-appx:///ResourceTestLib/Styles/_Thickness.xaml" />
More on UWP style URI schemes:
https://learn.microsoft.com/en-us/windows/uwp/app-resources/uri-schemes
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
In trying to set a default ResourceDictionary I receive the following warning:
The designer does not support loading dictionaries that mix
'ResourceDictionary' items without a key and other items in the same
collection. Please ensure that the 'Resources' property does not
contain 'ResourceDictionary' items without a key, or that the
'ResourceDictionary' item is the only element in the collection.
This is the code that I am using in my App.xaml file, that received the above warning:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Lang.en-US.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
This is the exact same code that I've used to set a ResourceDictionary in Visual Studio 2008. I am now using VS 2010. What Key do I need to provide this ResourceDictionary for it to work correctly?
This is the line in my MainWindow.xaml that I am currently testing along with this code:
<MenuItem Header="{DynamicResource new_test}" />
Since you haven't posted your complete XAML file, i suspect there are other resources apart from merged dictionary in your resources section.
As per MSDN -
It is legal to define resources within a ResourceDictionary that is
specified as a merged dictionary, either as an alternative to
specifying Source, or in addition to whatever resources are included
from the specified source. However, this is not a common scenario; the
main scenario for merged dictionaries is to merge resources from
external file locations. If you want to specify resources within the
markup for a page, you should typically define these in the main
ResourceDictionary and not in the merged dictionaries.
Try moving other resources in separate resource dictionary and make sure all other resources have x:Key set on them -
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Lang.en-US.xaml" />
</ResourceDictionary.MergedDictionaries>
<ResourceDictionary>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
<ContextMenu x:Key="MyContextMenu"/>
</ResourceDictionary>
</ResourceDictionary>
</Application.Resources>
Use resource file for translations. Its better than resource dictionary.
Here is an example:
Set prefix like this for usage in xaml.
xmlns:const="clr-namespace:FileExplorer.Properties"
Resources are located in properties.
To use them in XAML you will need following:
<TextBox Text="{x:Static const:Resources.Window_Title_String}"/>
If you have different languages then create for each language own resource file following naming convention.
For example:
Resources.resx (this will be default)
Resources.de-DE.resx (this is for german)
Now you just have to set current culture to german for your app to be on german and the proper resource file will be used automatically.
Like this in Main method:
Thread.CurrentThread.CurrentUICulture = new CultureInfo("de-DE");
I have a prism application and various modules. I am wondering where is the best place to locate resources such as styles, brush, controltemplates, datatemplates?
Should I make one single resource dictionary and put everything there? Should each module have their own resources? Or each view? I would like to follow the Prism goal of keeping everything modular, but also I dont see the point in re-declaring the same resources in every module...
I develop application with Prism, and I use technique very close to described in Prism's manual. There is YourApplication.Infrastructure project, where you usually place all your shared interfaces etc. So:
I just add project YourApplication.Resources
Create there folder Themes
Create separate xaml file in Themes folder for each group of resources (like Generic.WPF.xaml for standard WPF controls' styles, Generic.Brushes.xaml for brushes etc.)
Create file Themes\Generic.xaml (exactly with this name, it will add huge benefits in the future) with content like
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Generic.Brushes.xaml"/>
<ResourceDictionary Source="Generic.WPF.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
Now you can add those resources in any module (you have separate project for it, right?) by adding reference to YourApplication.Resources to that project and adding to your view's xaml:
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/YourApplication.Resources;component/Themes/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>
<!-- Put your not shared resource here -->
</ResourceDictionary>
</UserControl.Resources>
I don't know, maybe this way has some problems, but it works, and works well for me. If anybody can comment somehow this way (pros/cons) - I will be very happy to hear it!
Application-wide resources I usually put in a ResourceDictionary, which is added to either App.xaml or StartupWindow.xaml
Resources for a specific View are usually located with the View. For example, a UserControl that is being used for a CalendarView will contain any custom resources for the Calendar, such as calendar-specific brushes, styles, templates, etc.
I usually don't see a reason to make module-wide resources, but if I ever do I'd have a ResourceDictionary for the Module which can be loaded into the app's merged dictionaries at runtime, or included in individual Views in the Module.
I would like to share some new knowledges. I am using #chopikadze approach. And it is really cool approach. Thanks to you!
However, if you do not want write every time for each control these piece of code:
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/YourApplication.Resources;component/Themes/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>
<!-- Put your not shared resource here -->
</ResourceDictionary>
</UserControl.Resources>
Then you can just declare <ResourceDictionary/> in App.xaml of your Bootstrapper like that:
<Application.Resources>
<ResourceDictionary Source="pack://application:,,,/YourApplication.Resources;component/Themes/Generic.xaml"/>
</Application.Resources>
I have just tried to deploy my silverlight 4 site and ran across a problem.
I keep all of my styles etc. in a resource file and reference them like this:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resources/Styles.xaml" />
<ResourceDictionary Source="Resources/Templates.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
After deploying my website, my listbox (which has an overriden item template which i store in my templates.xaml) looked empty. However i know that i should see three items in my listbox, and i am able select three lines in the listbox they are just all empty. The problem seems to be that nothing gets drawn in the listbox items because i can not get to the resource file to get my style.
I have tried making the resource files embeded resources but no help.
Any ideas?
Ensure that the Templates.xaml file is part of your xap file.
To do that make sure the "Build Action" (in the properties of the Templates.xaml file) is set to "Resource"