CreateStreamedFileFromUriAsync:我如何传递IRandomAccessStreamReference？

Question

我试图使用StorageFile方法 下载文件,CreateStreamedFileFromUriAsync但我与IRandomAccessStreamReference参数混淆.我如何传递IRandomAccessStreamReference？这是一个界面.我该怎么办？

public static IAsyncOperation<StorageFile> CreateStreamedFileFromUriAsync(
    string displayNameWithExtension, 
    Uri uri, 
    IRandomAccessStreamReference thumbnail
)

Answer 1

我找到了答案:

IRandomAccessStreamReference thumbnail =
    RandomAccessStreamReference.CreateFromUri(new Uri(remoteUri));
IAsyncOperation<StorageFile> file1 =
    StorageFile.CreateStreamedFileFromUriAsync("duyuru.pdf", new Uri(remoteUri), thumbnail);