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;
}

}