I've creat a ResourceDictionary named Dictionary1.xaml, here is code:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style TargetType="{x:Type Window}">
<Setter Property="Background" Value="Red">
</Setter>
</Style>
I ref it in App.xaml or MainWindow.xaml like this:
<Application.Resources>
<ResourceDictionary Source="Dictionary1.xaml" />
</Application.Resources>
<Window.Resources>
<ResourceDictionary Source="Dictionary1.xaml" />
</Window.Resources>
And in View Designer, window's background changes to red, but when the application is running, it's background is default(white), why? How to do it ?
you can set other controls' style in this way,except Window! try to set sytle for Button,Lable and so on, you will get a correct result. But for a Window, you will not.
see my another answer ,it may help you: How to add a common control on all my Windows?
you must set the Style's x:Key and set the Window's style explicitly:
Style="{DynamicResource key_name}"
why the View Designer shows a correct result? it may be a bug. vs2012/13's xaml Designer has many bugs, you can search or commit in msdn.I've commit one in it :
https://connect.microsoft.com/VisualStudio/feedbackdetail/view/925324/multibinding-report-an-issue-on-latest-vs-xaml-editor
but ms closes it and they will not repaire it recently.
Related
I know I can set the style of a UserControl like so in the control by adding an attribute:
Style="{StaticResource MyStyle}"
And having a style in my ResourceDictionary that looks something like the following:
<Style x:Key="MyStyle" TargetType="{x:Type UserControl}">
<Style.Resources>
<Style TargetType="Label">
<!-- Label Setters -->
</Style>
<Style TargetType="TextBox">
<!-- TextBox Setters -->
</Style>
</Style.Resources>
</Style>
But is there a way I can set the style of the UserControl in the ResourceDictionary directly like:
<Style x:Key="MyStyle" TargetType="{x:Type MyControl}">
Essentially my question is, can I apply the style directly to the control instead of to the controls components?
EDIT:
What I am trying to accomplish is something like the following:
<Style x:Key="MyStyle" TargetType="{x:Type MyControl}">
<Setter Property="Background" Value="Black"/>
</Style>
<Style x:Key="{x:Type MyControl}" TargetType="{x:Type MyControl}" BasedOn="{StaticResource MyStyle}"/>
Where the second line applies the style to all controls in the application, if you do something similar with a normal control this approach works.
However this only sets the Background of the UserControl, so how can I apply that same background to its components.
How can I do it with the UserControl?
You can directly set the UserControl's Style like this:
<UserControl x:Class="MyNamespace.MyControl" xmlns:local="MyNamespace" ...>
<UserControl.Style>
<Style>
<Setter Property="local:MyControl.MyProperty" Value="..."/>
...
</Style>
</UserControl.Style>
</UserControl>
or like this:
<UserControl x:Class="MyNamespace.MyControl" xmlns:local="MyNamespace" ...>
<UserControl.Style>
<Style TargetType="local:MyControl">
<Setter Property="MyProperty" Value="..."/>
...
</Style>
</UserControl.Style>
</UserControl>
A default Style in the UserControl's Resources should also work:
<UserControl x:Class="MyNamespace.MyControl" xmlns:local="MyNamespace" ...>
<UserControl.Resources>
<Style TargetType="local:MyControl">
<Setter Property="MyProperty" Value="..."/>
...
</Style>
</UserControl.Resources>
</UserControl>
You need to remove the x:Key from your defined style so that it can be applied universally to all controls of the same type as what is defined in the TargetType.
To quote from MSDN for Style.TargetType Property:
Setting the TargetType property to the TextBlock type without setting an x:Key implicitly sets the x:Key to {x:Type TextBlock}. This also means that if you give the [...] Style an x:Key value of anything other than {x:Type TextBlock}, the Style would not be applied to all TextBlock elements automatically. Instead, you need to apply the style to the TextBlock elements explicitly.
Necro answer for a special case. If the user control is selected via a DataTemplate resource in another WPF control or window, WPF may not automagically apply a default style from an imported resource dictionary. However, you can apply named style resource after importing a resource dictionary.
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="../../Resources/ResourceDictionary.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</UserControl.Resources>
<UserControl.Style>
<Binding Source="{StaticResource MyUserControlStyle}"></Binding>
</UserControl.Style>
To style all controls, add your ResourceDictionary to the resources of your App.xaml.
<Application.Resources>
<!-- Your Resources for the whole application here -->
</Application.Resources>
If your open your Mainwindow with the App...
<Application ...
MainWindow="MainWindow">
or during the startup event...
<Application ...
MainWindow="MainWindow">
Startup="Application_Startup">
the resources are available in every control of your MainWindow.
To set the style for a specific usercontrol look here:
Set Style for user control
in your user control xaml place the style inside the resources tag:
<UserControl>
<UserControl.Resources>
<Style ...</Style>
</UserControl.Resources>
//.. my other components
</UserControl>
I have a resource dictionary file as so:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TIMS.Common">
<local:ViewModelLocator x:Key="ModelLocator" />
<Style x:Key="DefaultWindowStyle" TargetType="Window">
<Setter Property="Background" Value="Cyan" />
</Style>
<Style x:Key="DefaultPageStyle" TargetType="Page">
<Setter Property="Background" Value="Red" />
</Style>
<Style x:Key="DefaultGroupBoxStyle" TargetType="GroupBox">
<Setter Property="Background" Value="DarkGray" />
</Style>
And it's included into my App.XAML as so:
<Application x:Class="TIMS.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TIMS.Common"
StartupUri="Views/MainWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/TIMS;component/Resources.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
However, this style doesn't apply unless I specifically set the style in the XAML for that object.
Example:
<Window x:Class="TIMS.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TIMS.Views"
xmlns:nav="clr-namespace:System.Windows.Navigation;assembly=PresentationCore"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
xmlns:valueConverters="clr-namespace:TIMS.Utils.ValueConverters;assembly=TIMS.Utils"
x:Name="Main"
Title="Tote Inventory Management System - Southeastern Grocers"
Width="1024"
Style="{StaticResource DefaultWindowStyle}"
Height="768"
DataContext="{Binding MainWindowViewModel,
Source={StaticResource ModelLocator}}">
How can I make these the default style without have to explicitly set them on each element ?
If you want, for example, all your windows in your app to have the same style, remove the x:Key property of your style with TargetType Window.
Having the x:Key property will force you to explicitly use the style in your windows for it to apply. If you remove the x:key, then all the Windows of your app will use that style by default.
Here is a link that explains it with more détails : https://msdn.microsoft.com/en-us/library/ms745683(v=vs.110).aspx
In short, if you want your style to be global and apply by default to all controls of the TargetType type in your app, do not set a key to your style. If you want the style to be applied only to some of the controls of the TargetType type, set a key to your style and use it explicitly on the controls that will use it.
Quite odd scenario. I have the following App.xaml
<Application x:Class="BrokenBG.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="MainWindow.xaml">
<Application.Resources>
<Style x:Key="WindowStyleBase" TargetType="ContentControl" >
<Setter Property="Background" Value="Red" />
</Style>
<Style x:Key="WindowStyle" TargetType="{x:Type Window}" BasedOn="{StaticResource WindowStyleBase}" />
</Application.Resources>
</Application>
And a plain empty window with the style set:
<Window x:Class="BrokenBG.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="{StaticResource WindowStyle}">
<Grid>
</Grid>
</Window>
When I run the app all is fine. I see the red bg.
But I cannot see it in the designer. The code above is a repro case I've experienced in another larger project.
When I change Window Style from WindowStyle to WindowStyleBase then I can directly see the red background color in the designer.
Can this be fixed? My windows have a dark theme, therefore I cannot design the views in Visual Studio / Blend since the background is white and black during runtime (my text is white)
It looks like the designer has issues with BasedOn parsing? (unsure)
One thing that works, even though it won't compile.
You can change staticresource in the based on to dynamic resource.
It'll suddenly start working in designer, but this won't compile.
I even changed red to blue, and the designer updated.
As I have multiple Windows in my application, I am looking for a solution that does not require me to set a binding on each Window.
I created a ResourceDictionary which has a style for the Window Background:
<Style TargetType="{x:Type Window}">
<Setter Property="Background" Value="AliceBlue"/>
</Style>
In my XAML, I set the ResourceDictionary:
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Templates.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
There is no error, but my Window color stays white.
This appears to be caused by a combination of the order in which WPF loads/processes styles from nested ResourceDictionary, and the specifics of the Window class.
Assume MainWindow is defined as per your post. Now put the following in Templates.xaml:
<Style TargetType="{x:Type Window}">
<Setter Property="Background" Value="Red"/>
</Style>
<Style TargetType="{x:Type Window}" x:Key="myStyle">
<Setter Property="Background" Value="Green"/>
</Style>
If MainWindow has no style defined, then you will see that in the designer it appears with a red background. The designer is parsing the whole Xaml and loading the resource dictionary, and then drawing the results. The style is read before the window is drawn, and so the red background is applied.
When you run the application, the window is created before the ResourceDictionary is applied. It looks for a default style (a style with x:Key="{x:Type Window}") before the nested ResourceDictionary is processed, and finds nothing. Therefore at runtime, the window appears with default colour. (This is the behaviour described in the comments above.) Remember that the style with x:Key="{x:Type Window}" has a default value that matches the Windows style.
This is borne out if you use myStyle explicitly. If you add to your Window definition the attribute Style="{StaticResource myStyle}" you'll find that the designer fails, but you also get a run-time error, because myStyle hasn't been created at the time that the Window needs it. If you switch to Style="{DynamicResource myStyle}" then you'll see that it works as you hope, because DynamicResource will update once the ResourceDictionary has been parsed and the style included.
So, applying this, you can fix the problem in one way by adding this to your Window element: Style="{DynamicResource {x:Type Window}}" - but this is cludgy. The better solution is to include your resource dictionary in the app.xaml file, where it will be parsed before any window is opened and thus available to all:
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Templates.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
The real issue here is that your Window is not really a Window: it is a class that derives from Window and will in fact be MainWindow, Window2, etc... This means that the automatic style wireup for a Window will never work in this way, and some level of manual binding will unfortunately always be required.
This is the solution I used in my application. It lets me keep all my window styles together, and requires just a couple lines after the <Window.Resources> section.
Do your Style like so:
<Style x:Key="MyWindowStyle">
<Setter Property="Window.Background" Value="AliceBlue"/>
</Style>
Then, in your Window, after </Window.Resources> include the following:
<Window.Style>
<Style BasedOn="{StaticResource MyWindowStyle}"/>
</Window.Style>
Add a new brush in your resource dictionary
<SolidColorBrush x:Key="WindowBackground" Color="AliceBlue" />
and in your WPF window simply set the required resource to the window background property
<Window x:Class="GDD.Presentation.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="300" Width="300"
Background="{StaticResource WindowBackground}">
Some information related to problem: http://www.11011.net/archives/000692.html
Specific situation is : there is some generic textblock (key equals to type) styles declared in app.xaml which is in third party app, they used by all contentpresenters in my views ignoring my own styles.
I've found few possible solutions:
Explicitly assign all elements a style with overriden template & add resource dictionary with my styles to contentpresenter resources.
Add datatemplate for string, but there is a problem with access text detection ( may be solved by placing contentpresenter with ref to my own resources, isn't good solution because we increasing visual tree just to fix this problem)
Probably any other solutions?
P.S.: There is alot of views already exist, so first option is alot of work!
To reproduce create new wpf project and modify next files:
App.xaml add generic style:
<Application.Resources>
<Style TargetType="TextBlock">
<Setter Property="FontSize" Value="20"/>
</Style>
</Application.Resources>
MainWindow.xaml content is:
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Dictionary.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<StackPanel>
<Button Content="Hello world">
<Button.ContextMenu>
<ContextMenu>
<MenuItem Header="Access_Text"/>
<MenuItem Header="NormalText"/>
</ContextMenu>
</Button.ContextMenu>
</Button>
<TextBlock Text="WELCOME TO BLACK MESA"/>
</StackPanel>
Add Dictionary.xaml resource dictionary and add next style inside:
<Style TargetType="TextBlock">
<Setter Property="FontSize" Value="8"/>
</Style>
Not sure where you might do it as I don't understand the structure of your App, but if you want to remove the style from the Application Resources you could do it programatically like this
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
ResourceDictionary dic = App.Current.Resources;
dic[typeof (TextBlock)] = null;
}
}
Using the XAML you provided in a test WPF project this leaves me with the default font size of 12 rather than 20.