我收到以下错误:
System.Windows.Data错误:2:找不到管理FrameworkElement或 目标元素的FrameworkContentElement。 BindingExpression:路径=的ImagePath; 的DataItem = NULL; target元素是'VisualBrush'(HashCode = 52892165);目标 属性是'Visual'(类型'Visual')
我正在尝试将Canvas
类型从MainWindow
设置为我的WPF Control
(命名的SearchTextBox)属性ImagePath
,因此控件会显示它。这个Canvas
包裹了一个图标的路径。当我尝试运行它时,我无法看到图标,我得到了:
System.Windows.Data错误:2。
这是我的代码:
我的WPF控件:
SearchTextBox.cs:
public static readonly DependencyProperty ImagePathProperty =
DependencyProperty.Register(
"ImagePath",
typeof(Canvas),
typeof(SearchTextBox));
public Canvas ImagePath
{
get { return (Canvas)GetValue(ImagePathProperty); }
set { SetValue(ImagePathProperty, value); }
}
Generic.xaml
<Border x:Name="PART_SearchIconBorder"
Grid.Column="2"
VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
BorderBrush="{StaticResource SearchTextBox_SearchIconBorder}">
<Rectangle
Width="15"
Height="15">
<Rectangle.Fill>
<VisualBrush Stretch="Fill"
Visual="{Binding ImagePath}" />
</Rectangle.Fill>
</Rectangle>
我的观点:
<Controls:MetroWindow x:Class="TestUI.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:l="clr-namespace:UIControls;assembly=SearchTextBox"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
Title="Window1" Height="423" Width="487">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Resources/Icons.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colours.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Grid> //----appbar_add is the canvas
<l:SearchTextBox ImagePath="{StaticResource appbar_add}" Height="39" Margin="118,52,116,0" VerticalAlignment="Top" Name="m_txtTest" />
<TextBox Margin="118,0,116,68" Name="m_txtSearchContent" Height="65" VerticalAlignment="Bottom" />
<TextBlock HorizontalAlignment="Left" Margin="118,0,0,139" Width="107" Text="Search content" FontSize="14" Height="20" VerticalAlignment="Bottom" />
</Grid>
有什么想法吗?提前谢谢。
答案 0 :(得分:1)
我假设Generic.xaml中的内容是ControlTemplate
类的SearchTextBox
的一部分。由于它是一个控件模板,因此您需要使用TemplateBinding
绑定到应用模板的控件的属性。所以,改变:
Visual="{Binding ImagePath}"
到
Visual="{TemplateBinding ImagePath}"