我的应用程序使用WPF作为表示层。将控件属性绑定到工具提示中的控件
<UserControl x:Class="CarSystem.CustomControls.ReadPushPin"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:cs="clr-namespace:CarSystem.CustomControls"
mc:Ignorable="d"
DataContext="{Binding Path=Read, RelativeSource={RelativeSource Self}}"
d:DesignHeight="30"
d:DesignWidth="30">
<UserControl.Resources>
<cs:BooleanToVisibilityConverter x:Key="BoolToVisibility" True="Visible" False="Collapsed" />
<cs:DateConverterForRadDateTimePicker x:Key="DateConverter" />
</UserControl.Resources>
<Image Name="MarkerImage"
Source="{Binding Path=Source, RelativeSource={RelativeSource AncestorType={x:Type cs:ReadPushPin}}}">
<Image.ToolTip>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Image Grid.Column="0"
Grid.ColumnSpan="2"
Grid.Row="0"
Height="45"
HorizontalAlignment="Center"
Source="{Binding Path=ThumbnailImage, RelativeSource={RelativeSource AncestorType={x:Type cs:ReadPushPin}}}"
Visibility="{Binding Converter={StaticResource BoolToVisibility}, Path=HasThumbnail, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type cs:ReadPushPin}}}"
Width="60" />
<TextBlock Grid.Column="0"
Grid.Row="1"
HorizontalAlignment="Right"
Text="Plate:" />
<StackPanel Grid.Column="1"
Grid.Row="1"
HorizontalAlignment="Left"
Orientation="Horizontal">
<TextBlock Text="{Binding Path=Plate}" />
<TextBlock Text=", " />
<TextBlock Text="{Binding Path=State}" />
</StackPanel>
<TextBlock Grid.Column="0"
Grid.Row="2"
HorizontalAlignment="Right"
Text="Time:" />
<TextBlock Grid.Column="1"
Grid.Row="2"
HorizontalAlignment="Left"
Text="{Binding Converter={StaticResource DateConverter}, Path=TimeStamp}" />
<TextBlock Grid.Column="0"
Grid.Row="3"
HorizontalAlignment="Right"
Text="Nearest Address:" />
<TextBlock Grid.Column="1"
Grid.Row="3"
HorizontalAlignment="Left"
Text="{Binding Path=NearestAddress, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type cs:ReadPushPin}}}" />
<TextBlock Grid.Column="0"
Grid.Row="4"
HorizontalAlignment="Right"
Text="Cross Street:" />
<TextBlock Grid.Column="1"
Grid.Row="4"
HorizontalAlignment="Left"
Text="{Binding Path=CrossStreet, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type cs:ReadPushPin}}}" />
</Grid>
</Image.ToolTip>
</Image>
</UserControl>
有许多在绑定到不同的控制图像的工具提示属性的代码隐藏定义DependencyProperties的:我在我的代码,其XAML如下所示有一个UserControl
。
我的问题是ThumbnailImage,HasThumbnail,NearestAddress和CrossStreet属性上的绑定不起作用。在程序运行时,在调试输出窗口中看到如下错误:
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='CarSystem.CustomControls.ReadPushPin', AncestorLevel='1''. BindingExpression:Path=CrossStreet; DataItem=null; target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String')
我在做什么错?我如何获得绑定的工作?
Tony
我没有在DataContext中找到的任何东西上使用RelativeSource绑定。我将NearestAddress和CrossStreet属性移动到DataContext中的对象上,他们即将出现。这是我现在需要修复的ThumbnailImage&HasThumbnail属性。我会尝试将类型更改为UserControl并查看会发生什么。 – 2012-04-11 18:38:26