使用专用 XAML 文件交替 WPF 中元素的背景属性 [英] alternating BackGround property of an element in WPF using dedicated XAML File

问题描述

在 css 中，您可以从 html 文件中轻松调用任何样式通过代码改变给定元素中的一些样式属性

in css you can call from an html file any style and easily via code alter some property of style in a given element

所以在 C# WPF 中我想放置一个菜单按钮将允许改变背景

so in C# WPF i would like to place a menu button that will allow to alter the backGround

下面的 XAML 是 "Sample1" ，当前按原样硬编码，并在 范围内应用于当前 MainWindow.我如何创建 Sample2..4,5 以便通过 C# 代码，比如通过创建的样式"菜单按钮，我将能够更改元素的背景?

the XAML below is "Sample1" , is currently hardcoded as-is, and applied within a <Window.Background> scope, to current MainWindow. how can i create Sample2..4,5 so that via C# code, say through the "Style" menu button created, i will be able to alter the BackGround of an element ?

在哪里可以有序地放置设置?

where could i place the settings in an orderly manner?

    <LinearGradientBrush  EndPoint="1,0.5" StartPoint="0,0.5" x:Name="Sample1" Opacity="0.46">
        <GradientStop Color="#8F63BADF" Offset="0.117" />
        <GradientStop Color="#9D56B7C9" Offset="0.666" />
        <GradientStop Color="#9343C0DB" Offset="0.279" />
        <GradientStop Color="#E734ABDA" Offset="0.442" />
        <GradientStop Color="#927FE2E2" Offset="0.802" />
        <GradientStop Color="#E974CFC1" Offset="0.56" />
        <GradientStop Color="#D076C5EB" Offset="0.255" />
    </LinearGradientBrush>

推荐答案

您可以在 ResourceDictionary 中创建不同的样式，并在 App.xaml 中引用您的 ResourceDictionary.

You can create different styles in a ResourceDictionary and reference your ResourceDictionary in your App.xaml.

然后您可以随时从您的代码中更改任何元素的样式.

Then you can at any time from your code change the style of any element.

例如:

<ResourceDictionary>
  <Style x:Key="Style1BackgroundRed" TargetType="{x:Type Window}">
    <Setter Property="Background" Value="Red"/>
  </Style>

  <Style x:Key="Style2BackgroundGradient" TargetType="{x:Type Window}">
    <Setter Property="Background">
      <Setter.Value>
        <LinearGradientBrush  EndPoint="1,0.5" StartPoint="0,0.5" x:Name="Sample1" Opacity="0.46">
         <GradientStop Color="#8F63BADF" Offset="0.117" />
         <GradientStop Color="#9D56B7C9" Offset="0.666" />
         <GradientStop Color="#9343C0DB" Offset="0.279" />
         <GradientStop Color="#E734ABDA" Offset="0.442" />
         <GradientStop Color="#927FE2E2" Offset="0.802" />
         <GradientStop Color="#E974CFC1" Offset="0.56" />
         <GradientStop Color="#D076C5EB" Offset="0.255" />
      </LinearGradientBrush>
    </Setter.Value>
  </Style>
</ResourceDictionary

在您的 App.xaml 中:

<Application.Resources>
  <ResourceDictionary Source="/WhateverFolderYouUsedForYouStyles/StyleDictionary.xaml"/>
</Application.Resources>

来自您的窗口代码:

public MainWindow()
{
  this.Style = (Style)Application.Current.FindResource("Style1BackgroundRed");
}

如果您想更改为另一种样式，同样可以找到另一种样式.

Same way you can find the other style if you want to change to that one.

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