WPF 精修篇 动态资源

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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;
            }
      
        }

WPF 精修篇 动态资源

标签：oid   object   code   word   fill   onclick   near   width   class   

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