Question

如何从后面的代码访问“图像”以更改其图像源？ xaml代码看起来像这样

<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Class="Demo.ChartButton"
d:DesignWidth="100" d:DesignHeight="100">
<UserControl.Resources>
    <Style x:Key="ButtonStyle1" TargetType="Button">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Grid>
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal"/>
                                <VisualState x:Name="MouseOver">
                                    <Storyboard>
                                        <ColorAnimation Duration="0" To="White"  Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Color)" Storyboard.TargetName="image" d:IsOptimized="True" />
                                        <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.ShadowDepth)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                        <DoubleAnimation Duration="0" To="5" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.BlurRadius)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                        <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Opacity)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Pressed">
                                    <Storyboard>
                                        <ColorAnimation Duration="0" To="AntiqueWhite" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Color)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                        <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Opacity)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Opacity)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                        <ColorAnimation Duration="0" To="#FFAFAFAF" Storyboard.TargetProperty="(UIElement.Effect).(DropShadowEffect.Color)" Storyboard.TargetName="image" d:IsOptimized="True"/>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>

                        </VisualStateManager.VisualStateGroups>
                        <Image x:Name="image" RenderTransformOrigin="0,0" Source="/Demo;component/spreadsheet-icon.png" >
                            <Image.Effect>
                                <DropShadowEffect ShadowDepth="0" BlurRadius="10" Color="Black" Opacity="1"/>
                            </Image.Effect>
                        </Image>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</UserControl.Resources>

<Button Content="" Margin="0,0,0,0" Style="{StaticResource ButtonStyle1}" Click="Button_Click" />

感谢任何帮助。

Answer 1

访问此功能的唯一方法是导航可视树以找到图像。使用Linq-To-VisualTree，您可以按如下方式找到它：

using LinqToVisualTree

private void Button_Click(object sender, EventArgs e)
{
  Button button = sender as Button;
  Image img = button.Descendants<Image>().Single() as Image;
  img.Source = "..."
}

如何从silverlight中的代码访问自定义样式的控件？

1 个答案: