我试图用显示在Image.Source中的矢量图像XamlReader。我有这样的XAML资源。
<Canvas Width="76" Height="76" ClipToBounds="True" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Path Fill="#FF000000" Height="76" Stretch="Fill" Width="76">
<Path.Data>
<PathGeometry FillRule="Nonzero" Figures="M21,30.0001L55.9999,30.0001 55.9999,50 21,50 21,30.0001z M52,28L37,28C38,25,39.4999,24.0001,39.4999,24.0001L50.75,24C51.3023,24,52,24.6977,52,25.25L52,28z" />
</Path.Data>
</Path>
从此处创建了绑定。但是，当我尝试将其与以下项一起使用时，它不起作用：
<Image Stretch="Fill" Source="{Binding Converter={StaticResource uriToUIElementConverter},ConverterParameter=images/Folder.xaml}"/>
文件的属性Build Action=Resource。转换器uriTOUIElementConverter是：
public class FileToUIElementConverter :IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
FileStream fileStream = new FileStream((string)parameter, FileMode.Open);
return XamlReader.Load(fileStream) as DrawingImage;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
当我尝试构建项目时，出现以下错误：
System.IO.FileNotFoundException
我这样编辑转换器：
Stream fileStream = Application.GetResourceStream(new Uri("pack://application:,,,/ASSEMBLYNAME;component/"+(string) parameter)).Stream;
但这不会再次起作用。我应该怎么做才能使其正常工作？
Application.GetResourceStream所需提供的路径是相对于应用程序包的。
例：
我有XAML文件Images / Folder.xaml。Folder.xaml的生成操作是Resource。
Folder.xaml
<DrawingImage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<DrawingImage.Drawing>
<GeometryDrawing Brush="LimeGreen">
<GeometryDrawing.Geometry>
<PathGeometry FillRule="Nonzero"
Figures="M21,30.0001L55.9999,30.0001 55.9999,50 21,50 21,30.0001z M52,28L37,28C38,25,39.4999,24.0001,39.4999,24.0001L50.75,24C51.3023,24,52,24.6977,52,25.25L52,28z" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>
转换器：
public class FileToUIElementConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string path = parameter.ToString();
StreamResourceInfo sri = Application.GetResourceStream(new Uri(path, UriKind.Relative));
if (sri != null)
{
using (Stream stream = sri.Stream)
{
var logo = XamlReader.Load(stream) as DrawingImage;
if (logo != null)
{
return logo;
}
}
}
throw new Exception("Resource not found");
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
用法：
<Image x:Name="ImageLogo" Source="{Binding Converter={StaticResource FileToUiElementConverter}, ConverterParameter=images/folder.xaml}"/>
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