我试图在代码中设置WPF图像的源代码。图像作为资源嵌入到项目中。通过查看示例，我提出了下面的代码。由于某种原因，它不工作-图像不显示。
通过调试，我可以看到流包含图像数据。怎么了?
Assembly asm = Assembly.GetExecutingAssembly();
Stream iconStream = asm.GetManifestResourceStream("SomeImage.png");
PngBitmapDecoder iconDecoder = new PngBitmapDecoder(iconStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
ImageSource iconSource = iconDecoder.Frames[0];
_icon.Source = iconSource;
图标的定义如下:<Image x:Name="_icon" Width="16" Height="16" />
当前回答
你有没有试过:
Assembly asm = Assembly.GetExecutingAssembly();
Stream iconStream = asm.GetManifestResourceStream("SomeImage.png");
BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = iconStream;
bitmap.EndInit();
_icon.Source = bitmap;
其他回答
我是WPF的新手，但不熟悉。net。
我花了五个小时尝试在。net 3.5 (Visual Studio 2010)中添加一个PNG文件到“WPF自定义控件库项目”，并将其设置为图像继承控件的背景。
与uri相关的任何东西都不起作用。我无法想象为什么没有方法从资源文件中获取URI，通过智能感知，可能是:
Properties.Resources.ResourceManager.GetURI("my_image");
我已经尝试了很多uri和ResourceManager，以及Assembly的GetManifest方法，但都有异常或NULL值。
在这里我罐的代码，为我工作:
// Convert the image in resources to a Stream
Stream ms = new MemoryStream()
Properties.Resources.MyImage.Save(ms, ImageFormat.Png);
// Create a BitmapImage with the stream.
BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = ms;
bitmap.EndInit();
// Set as source
Source = bitmap;
你有没有试过:
Assembly asm = Assembly.GetExecutingAssembly();
Stream iconStream = asm.GetManifestResourceStream("SomeImage.png");
BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = iconStream;
bitmap.EndInit();
_icon.Source = bitmap;
在遇到与您相同的问题并进行了一些阅读之后，我发现了解决方案—打包uri。
我在代码中做了以下事情:
Image finalImage = new Image();
finalImage.Width = 80;
...
BitmapImage logo = new BitmapImage();
logo.BeginInit();
logo.UriSource = new Uri("pack://application:,,,/AssemblyName;component/Resources/logo.png");
logo.EndInit();
...
finalImage.Source = logo;
或者更短，通过使用另一个BitmapImage构造函数:
finalImage.Source = new BitmapImage(
new Uri("pack://application:,,,/AssemblyName;component/Resources/logo.png"));
URI被分成几个部分:
Authority: application:/// Path: The name of a resource file that is compiled into a referenced assembly. The path must conform to the following format: AssemblyShortName[;Version][;PublicKey];component/Path AssemblyShortName: the short name for the referenced assembly. ;Version [optional]: the version of the referenced assembly that contains the resource file. This is used when two or more referenced assemblies with the same short name are loaded. ;PublicKey [optional]: the public key that was used to sign the referenced assembly. This is used when two or more referenced assemblies with the same short name are loaded. ;component: specifies that the assembly being referred to is referenced from the local assembly. /Path: the name of the resource file, including its path, relative to the root of the referenced assembly's project folder.
application:后面的三个斜杠必须用逗号代替:
注意:包URI的授权组件 是一个嵌入式URI，指向 包装，必须符合RFC 2396。 此外，“/”字符必须 替换为“，”字符， 以及保留字符，如“%” "?"必须转义。查看OPC 获取详细信息。
当然，还要确保将映像上的构建操作设置为Resource。
还有一种更简单的方法。如果图像在XAML中作为资源加载，并且所讨论的代码是该XAML的幕后代码:
下面是一个XAML文件的资源字典——你唯一关心的一行是ImageBrush，键为“PosterBrush”——其余的代码只是用来显示上下文
<UserControl.Resources>
<ResourceDictionary>
<ImageBrush x:Key="PosterBrush" ImageSource="..\Resources\Images\EmptyPoster.jpg" Stretch="UniformToFill"/>
</ResourceDictionary>
</UserControl.Resources>
在后面的代码中，你可以这样做
ImageBrush posterBrush = (ImageBrush)Resources["PosterBrush"];
这是一个更少的代码，可以在一行中完成。
string packUri = "pack://application:,,,/AssemblyName;component/Images/icon.png";
_image.Source = new ImageSourceConverter().ConvertFromString(packUri) as ImageSource;
