WPF 精修篇 动态资源

原文:WPF 精修篇 动态资源

动态资源 使用 DynamicResource 关键字

静态 就是 StaticResource

原则上是 能用静态就用静态 动态会让前台界面压力很大~

动态资源引用 就是可以在后台改变资源 显示不同的样式  资源是一样的 就看关键字用什么

效果

<Window.Resources>
<LinearGradientBrush x:Key="RectFill" EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="BurlyWood" Offset="0"/>
<GradientStop Color="White" Offset="1"/>
</LinearGradientBrush>
</Window.Resources>
<Grid>
<Rectangle Fill="{ DynamicResource RectFill}" HorizontalAlignment="Left" Height="76" Margin="85,70,0,0" Stroke="Black" VerticalAlignment="Top" Width="243">

</Rectangle>
<RadioButton x:Name="R" Content="R" HorizontalAlignment="Left" Margin="377,70,0,0" VerticalAlignment="Top" Click="R_Click"/>
<RadioButton x:Name="G" Content="G" HorizontalAlignment="Left" Margin="377,98,0,0" VerticalAlignment="Top" Click="G_Click"/>
<RadioButton x:Name="B"  Content="B" HorizontalAlignment="Left" Margin="377,130,0,0" VerticalAlignment="Top" Click="B_Click"/>

</Grid>

private void R_Click(object sender, RoutedEventArgs e)
{
var bursh = Resources["RectFill"];
if (bursh is LinearGradientBrush) 
{
LinearGradientBrush Ibursh = (LinearGradientBrush)bursh;
Ibursh = new LinearGradientBrush()
{
GradientStops = new GradientStopCollection() 
{
new  GradientStop(Colors.BurlyWood,0),
new GradientStop(Colors.Red,1)

}
};
Resources["RectFill"] = Ibursh;
}

}

private void G_Click(object sender, RoutedEventArgs e)
{
var bursh = Resources["RectFill"];
if (bursh is LinearGradientBrush)
{
LinearGradientBrush Ibursh = (LinearGradientBrush)bursh;
Ibursh = new LinearGradientBrush()
{
GradientStops = new GradientStopCollection() 
{
new  GradientStop(Colors.BurlyWood,0),
new GradientStop(Colors.Green,1)

}
};
Resources["RectFill"] = Ibursh;
}

}

private void B_Click(object sender, RoutedEventArgs e)
{
var bursh = Resources["RectFill"];
if (bursh is LinearGradientBrush)
{
LinearGradientBrush Ibursh = (LinearGradientBrush)bursh;
Ibursh = new LinearGradientBrush()
{
GradientStops = new GradientStopCollection() 
{
new  GradientStop(Colors.BurlyWood,0),
new GradientStop(Colors.Blue,1)

}
};
Resources["RectFill"] = Ibursh;
}

}

原文地址：https://www.cnblogs.com/lonelyxmas/p/12075517.html