我有一个关于在WPF中查找资源的问题,并且我阅读了从书中查找资源的机制。
它说UIElement会首先找到它的资源属性,如果不合适则会找到其父资源属性等等,直到应用资源属性为止。
我认为这就像泡沫路线事件一样。
所以我在stackpanel中定义了一个资源,这里是xaml。
<Window x:Class="DynamicResource.MainWindow"
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"
xmlns:local="clr-namespace:DynamicResource"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<StackPanel x:Name="stackPanel">
<StackPanel.Resources>
<TextBlock x:Key="res1" Text="this is staticresource" Background="Beige"></TextBlock>
<TextBlock x:Key="res2" Text="this is dynamicresource" Background="DarkGoldenrod"></TextBlock>
</StackPanel.Resources>
<Button Margin="5,5,5,0" Content="{StaticResource res1}"></Button>
<Button Margin="5,5,5,0" Content="{DynamicResource res2}"></Button>
<Button x:Name="button" Margin="5,5,5,0" Content="refresh resource" Click="Button_Click"></Button>
</StackPanel>
然后我尝试在按钮点击事件中更改动态资源,这里是xaml.cs
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
//Can find target resource
//stackPanel.Resources["res1"] = new TextBlock() { Text = "this is new staticresource", Background = new SolidColorBrush(Colors.Tan) };
//stackPanel.Resources["res2"] = new TextBlock() { Text = "this it new dynamicresouce", Background = new SolidColorBrush(Colors.Magenta) };
//Can't find target resource
button.Resources["res1"] = new TextBlock() { Text = "this is new staticresource", Background = new SolidColorBrush(Colors.Tan) };
button.Resources["res2"] = new TextBlock() { Text = "this it new dynamicresouce", Background = new SolidColorBrush(Colors.Magenta) };
}
}
但是按钮的资源并没有改变。
那么是什么导致这种情况发生,以及如何能够发现资源。
答案 0 :(得分:0)
您必须为按钮设置名称,并在
后面的代码中使用此名称 xaml中的:
private void Button_Click(object sender, RoutedEventArgs e)
{
btnRes2.Resources["res2"] = new TextBlock() { Text = "this it new dynamicresouce", Background = new SolidColorBrush(Colors.Magenta) };
}
代码背后的:
loop
此代码适用于DynamicResource。