从 UWP 访问作为资源嵌入到 Net Standard 2.0 class 库中的 StorageFile

Question

我们如何从 UWP 访问作为资源嵌入到 .Net Standard 2 class 库中的文件？问题 return 是一个流。我们如何 return 存储文件？

该文件位于名为 Shared 的 .Net Standard 2 项目中，该项目与 UWP 项目位于同一解决方案中。该文件位于 Shared/Reports 中并设置为复制以作为 EmbeddedResource 输出。

我试过了

Uri resourcePath = new Uri("ms-appx:///Shared/Reports/MyReport");
StorageFile myFile = await StorageFile.GetFileFromApplicationUriAsync(resourcePath);

和

Uri resourcePath = new Uri("Shared/Reports/MyReport");
StorageFile myFile = await StorageFile.GetFileFromApplicationUriAsync(resourcePath);

两者都 return FileNotFoundException.

StorageFile.GetFileFromApplicationUriAsync 是合适的方法吗？如果是这样，我该如何正确格式化 URI？

Answer 1

Yes but the example given A: doesn't work and B: uses methods specific to pdfiles.

没关系。我在上面评论中提到的 link 只是一个类似的问题。我的目的是告诉您将流保存到 StorageFile 中。不过你好像不太熟悉。

我做了一个代码示例供你参考。

public class Class1
{
    /// <summary>
    /// This is the method in my .Net Standard library
    /// </summary>
    /// <returns></returns>
    public static Stream GetImage()
    {
        var assembly = typeof(Class1).GetTypeInfo().Assembly;
        Stream stream = assembly.GetManifestResourceStream("ClassLibrary1.Assets.dog.jpg");
        return stream;
    }
}

    /// <summary>
    /// This method is used to create a StorageFile and save the stream into it, then return this StorageFile
    /// </summary>
    /// <returns></returns>
    private async Task<StorageFile> GetFile()
    {
        StorageFile storageFile = await ApplicationData.Current.TemporaryFolder.CreateFileAsync("Temp.jpg",CreationCollisionOption.ReplaceExisting);
        using (var Srcstream = ClassLibrary1.Class1.GetImage())
        {
            using (var targetStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite))
            {
                using (var reader = new DataReader(Srcstream.AsInputStream()))
                {
                    var outpustream = targetStream.GetOutputStreamAt(0);
                    await reader.LoadAsync((uint)Srcstream.Length);
                    while (reader.UnconsumedBufferLength >0)
                    {
                        uint datatoend = reader.UnconsumedBufferLength > 128 ? 128 : reader.UnconsumedBufferLength;
                        IBuffer buffer = reader.ReadBuffer(datatoend);
                        await outpustream.WriteAsync(buffer);
                    }
                    await outpustream.FlushAsync();
                }
            }
        }
        return storageFile;
    }

从 UWP 访问作为资源嵌入到 Net Standard 2.0 class 库中的 StorageFile

Access a StorageFile embedded as a resource in a Net Standard 2.0 class libary from UWP

c#

uwp

.net-standard

.net-standard-2.0