如何从生成动作标记为Resource的图像中获取System.Drawing.Image对象? [英] How to get a System.Drawing.Image object from image which build action is marked as Resource?

问题描述

我有一个wpf应用程序，并且有一个对代码隐藏有用的图像，该图像在项目中的位置类似于"projectName \ images \ pp.png"，其构建动作为资源"(节点:非嵌入式资源).我在后面的代码中需要一个System.Drawing.Image对象.我尝试了以下方法:

I have a wpf app,and got a image useful for codebehind which's location in the project is something like "projectName\images\pp.png" and its build action is "Resource"(Node:not Embedded Resource). I need a System.Drawing.Image object in the codebehind. I tried these methods:

1.

var img = new BitmapImage(new Uri(@"\images\pp.png", UriKind.Relative));
var stream = img.StreamSource;
System.Drawing.Image needObj = Image.FromStream(stream);

我有一个空流，所以它不起作用.

i got a null stream,so it's not work.

2.

private static System.IO.Stream getResource(string name)
{
    var assembly = Assembly.GetExecutingAssembly();
    string resName = assembly.GetName().Name + ".g.resources";
    return assembly.GetManifestResourceStream(resName);
}
var stream = getResource(@"\images\pp.png");
System.Drawing.Image needObj = Image.FromStream(stream);

我得到了一个UnmanagedMemoryStream对象，并且在调用"Image.FromStream(stream)"时发生了InvalidArgument异常.

i got an UnmanagedMemoryStream object,and an InvalidArgument exception occurred while calling "Image.FromStream(stream)" .

任何人都可以告诉我为什么上述两种方法不起作用或如何实现吗?

Could anyone tell me why the two methods above not working or how to achieve it ?

推荐答案

WPF-获取图像资源并转换为System.Drawing.Image

var bitmapImage = new BitmapImage(new Uri(@"pack://application:,,,/"
    + Assembly.GetExecutingAssembly().GetName().Name
    + ";component/"
    + "images/pp.png", UriKind.Absolute));

var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create((BitmapImage)bitmapImage));
var stream = new MemoryStream();
encoder.Save(stream);
stream.Flush();
var image = new System.Drawing.Bitmap(stream);

注意:

• 使用"/"代替"\"
• 考虑阅读在WPF中打包URI (重要部分:资源文件包URI)
• 添加对system.drawing.dll的引用

• Use "/" instead of "\"
• Consider reading Pack URIs in WPF (important part: Resource File Pack URIs)
• Add reference to system.drawing.dll

本地程序集资源文件

已编译到本地的资源文件的包URI.程序集使用以下权限和路径: pack://application:,,,/ReferencedAssembly; component/Subfolder/ResourceFile.Ext

The pack URI for a resource file that is compiled into the local assembly uses the following authority and path: pack://application:,,,/ReferencedAssembly;component/Subfolder/ResourceFile.Ext

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