blocks|key|1193458|text|将它们放在XAML中某个元素的Resources集合中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1193459|<Window+...>
++++<Window.Resources>
++++++++<LinearGradientBrush+x:Key="BlaBrush">
++++++++++++<GradientStop+Offset="0"+Color="Red"/>
++++++++++++<GradientStop+Offset="1"+Color="Green"/>
++++++++</LinearGradientBrush>
++++++++
++++</Window.Resources>
++++
</Window>|code-block|syntax|javascript|1193460|然后使用FindResource在代码中获取它们|offset|length|1193461|var+blaBrush+=+this.FindResource("BlaBrush")+as+LinearGradientBrush;|1193462|有关详细信息，请参阅Resources+Overview。|1193463|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.findresource.aspx|1|http://msdn.microsoft.com/en-us/library/ms750613.aspx^0|0|0|4|C|0|0|0|A|I|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@$I|11|J|12|1|13]]|A|$]]|$1|K|3|L|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|15|8|@]|9|@$I|16|J|17|1|18]]|A|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]]]

Put them in the Resources collection of one of your elements in XAML: 

<pre><code>&lt;Window ...&gt;
 &lt;Window.Resources&gt;
 &lt;LinearGradientBrush x:Key="BlaBrush"&gt;
 &lt;GradientStop Offset="0" Color="Red"/&gt;
 &lt;GradientStop Offset="1" Color="Green"/&gt;
 &lt;/LinearGradientBrush&gt;
 &lt;!-- Other resources --&gt;
 &lt;/Window.Resources&gt;
 &lt;!-- Contents of window --&gt;
&lt;/Window&gt;
</code></pre>

Then get them in code by using <a href="http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.findresource.aspx" rel="noreferrer">FindResource</a>

<pre><code>var blaBrush = this.FindResource("BlaBrush") as LinearGradientBrush;
</code></pre>

See <a href="http://msdn.microsoft.com/en-us/library/ms750613.aspx" rel="noreferrer">Resources Overview</a> for more information.

blocks|key|1193530|text|您的xaml将如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1193531|MainWindow.xaml|1193532|<Window+x:Class="BrushResource.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>
++++<LinearGradientBrush+x:Key="BrushOne"+StartPoint="0,0.5"+EndPoint="1,0.5"+Opacity="0.5">
++++++++<LinearGradientBrush.GradientStops>
++++++++++++<GradientStopCollection>
++++++++++++++++<GradientStop+Color="Black"+Offset="0"+/>
++++++++++++++++<GradientStop+Color="Silver"+Offset="1"+/>
++++++++++++</GradientStopCollection>
++++++++</LinearGradientBrush.GradientStops>
++++</LinearGradientBrush>

++++<LinearGradientBrush+x:Key="BrushTwo"+StartPoint="0,0.5"+EndPoint="1,0.5"+Opacity="0.5">
++++++++<LinearGradientBrush.GradientStops>
++++++++++++<GradientStopCollection>
++++++++++++++++<GradientStop+Color="Maroon"+Offset="0"+/>
++++++++++++++++<GradientStop+Color="Silver"+Offset="1"+/>
++++++++++++</GradientStopCollection>
++++++++</LinearGradientBrush.GradientStops>
++++</LinearGradientBrush>
</Window.Resources>

<StackPanel>
++++<Button+Content="Button"+Width="100"+Click="myButton_Click"/>
</StackPanel>|code-block|syntax|javascript|1193533|​|1193534|要赋值，需要从资源中抓取渐变笔刷，如下所示：|1193535|MainWindow.xaml.cs|1193536|private+void+myButton_Click(object+sender,+RoutedEventArgs+e)
++++{
++++++++(sender+as+Button).Background+=+this.Resources["BrushOne"]+as+LinearGradientBrush;
++++}|1193537|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Your xaml would look something like this:

MainWindow.xaml

<pre><code>&lt;Window x:Class="BrushResource.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"&gt;

&lt;Window.Resources&gt;
 &lt;LinearGradientBrush x:Key="BrushOne" StartPoint="0,0.5" EndPoint="1,0.5" Opacity="0.5"&gt;
 &lt;LinearGradientBrush.GradientStops&gt;
 &lt;GradientStopCollection&gt;
 &lt;GradientStop Color="Black" Offset="0" /&gt;
 &lt;GradientStop Color="Silver" Offset="1" /&gt;
 &lt;/GradientStopCollection&gt;
 &lt;/LinearGradientBrush.GradientStops&gt;
 &lt;/LinearGradientBrush&gt;

 &lt;LinearGradientBrush x:Key="BrushTwo" StartPoint="0,0.5" EndPoint="1,0.5" Opacity="0.5"&gt;
 &lt;LinearGradientBrush.GradientStops&gt;
 &lt;GradientStopCollection&gt;
 &lt;GradientStop Color="Maroon" Offset="0" /&gt;
 &lt;GradientStop Color="Silver" Offset="1" /&gt;
 &lt;/GradientStopCollection&gt;
 &lt;/LinearGradientBrush.GradientStops&gt;
 &lt;/LinearGradientBrush&gt;
&lt;/Window.Resources&gt;

&lt;StackPanel&gt;
 &lt;Button Content="Button" Width="100" Click="myButton_Click"/&gt;
&lt;/StackPanel&gt;
</code></pre>



To assign the value, you need to grab the gradient brush from the resources like this:

MainWindow.xaml.cs

<pre><code>private void myButton_Click(object sender, RoutedEventArgs e)
 {
 (sender as Button).Background = this.Resources["BrushOne"] as LinearGradientBrush;
 }
</code></pre>

blocks|key|1193598|text|您可以访问应用程序资源，如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1193599|Application.Current.Resources["BlaBrush"]+as+LinearGradientBrush|code-block|syntax|javascript|1193600|或者，您可以将资源添加到控件的资源中，并像Quartermeister所写的那样访问它们。|1193601|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

You can access the application resources as

<pre><code>Application.Current.Resources["BlaBrush"] as LinearGradientBrush
</code></pre>

Or, you add the resource to the control's resources and access them like Quartermeister wrote.

blocks|key|979328|text|请注意，现有的答案谈到了将资源放在Window.Resources中。如果您希望资源在应用程序范围内可用，您可以考虑将它们放在App.xaml中，或者更好的是，创建独立的资源字典，这些字典可以包含在您的视图中并在其他地方(包括其他项目)重用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|979329|<UserControl.Resources>
++++<ResourceDictionary>
++++++++<ResourceDictionary.MergedDictionaries>
++++++++++++<ResourceDictionary+Source="DefaultStyles.xaml"/>
++++++++</ResourceDictionary.MergedDictionaries>
++++++++<Style+x:Key="my_style"+/>
++++</ResourceDictionary>
</UserControl.Resources>|code-block|syntax|javascript|979330|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Note that the existing answers talk about putting the resources in Window.Resources. If you want the resources to be available application-wide, you might consider putting them in App.xaml or better yet, create stand-alone resource dictionaries that can be included in your views and re-used elsewhere (including other projects)

<pre><code>&lt;UserControl.Resources&gt;
 &lt;ResourceDictionary&gt;
 &lt;ResourceDictionary.MergedDictionaries&gt;
 &lt;ResourceDictionary Source="DefaultStyles.xaml"/&gt;
 &lt;/ResourceDictionary.MergedDictionaries&gt;
 &lt;Style x:Key="my_style" /&gt;
 &lt;/ResourceDictionary&gt;
&lt;/UserControl.Resources&gt;
</code></pre>

Theoretically, I think that I can define Brushes and Colors etc. in an xaml file and assign that to a button.background in c#. But how do I do that? Where do I put my lineargradientbrush definition like this:

<pre><code>&lt;LinearGradientBrush x:Key="BlaBrush"&gt;
 &lt;GradientStop Offset="0" Color="Red"/&gt;
 &lt;GradientStop Offset="1" Color="Green"/&gt;
&lt;/LinearGradientBrush&gt;
</code></pre>

Just putting it at various places in my window's xaml file results in various error messages :/

I found this question here on stackoverflow: <a href="https://stackoverflow.com/questions/1248177/how-to-use-a-defined-brush-resource-in-xaml-from-c">How to use a defined brush resource in XAML, from C#</a> which explains a part of it, but he seems to know where to do the Brush definition.

I also tried adding the shinyblue.xaml wpf template to the app and added <code>&lt;ResourceDictionary Source="ShinyBlue.xaml"/&gt;</code> to the application.resources in app.xaml. This makes all my buttons blue instantly, but still, the "things" defined in shinyblue.xaml like NormalBrush is not accessible from C# - at least I don't know how.

Marc

How to define and use resources in xaml so they can be used in C#

从理论上讲，我认为我可以在xaml文件中定义笔刷和颜色等，并将其分配给c#中的button.background。但是我该怎么做呢？我应该把我的线性梯度笔刷定义放在哪里呢？<LinearGradientBrush x:Key="BlaBrush"> <GradientStop Offset...

问如何在xaml中定义和使用资源，以便可以在C#中使用它们
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在xaml中定义和使用资源，以便可以在C#中使用它们EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在xaml中定义和使用资源，以便可以在C#中使用它们
EN