将流将流放入C＃和Winrt中

Question

我在c＃和winrt中有：

var stream = await speech.GetSpeakStreamAsync(SpeechText.Text, language);

stream是Windows.Storage.Streams.IRandomAccessStream

所以我是C＃和Winrt的新手。我如何保存此流将WAV文件限制到文件中？预先感谢Basilius

Answer 1

irandomaccessstream具有一种称为getInputStreamat http://msdn.microsoft.com/en-us/library/windows/windows/windows/windows.storage.storage.storage.storeams.irandomaccessstreams.irandomamaccessstream

IInputStream inputStream = stream.GetInputStreamAt(0);

这为您带来了iInputStream。

iInputStream接口仅定义一种方法ReadAsync，它使您可以将字节读取到Ibuffer对象中。Windows.storage.Stream还包括一个基于IInputStream对象创建的DataReader类，然后从流中读取许多.NET对象以及字节数组。http://www.charlespetzold.com/blog/2011/11/080203.html，http://msdn.microsoft.com/library/windows/windows/apps/br208119 >

using (var stream = new InMemoryRandomAccessStream())
{
    // for example, render pdf page
    var pdfPage = document.GetPage((uint)i);
    await pdfPage.RenderToStreamAsync(stream);
    // then, write page to file
    using (var reader = new DataReader(stream))
    {
        await reader.LoadAsync((uint)stream.Size);
        var buffer = new byte[(int)stream.Size];
        reader.ReadBytes(buffer);
        await Windows.Storage.FileIO.WriteBytesAsync(file, buffer);
    }
}

现在，您有一个包含所有读字节的缓冲区。

您现在可以将此缓冲区保存到文件http://blog.jerrog.jerrog.jerrynixon.com/2012/06/windows-8-how-to-read-files-in-winrt.html

var file = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFileAsync("MyWav.wav", Windows.Storage.CreationCollisionOption.ReplaceExisting);
await Windows.Storage.FileIO.WriteBytesAsync(file, buffer);

Answer 2

我无法将代码添加到注释中，因此这是vb.net中的代码：dim gesprocheneswort作为windows.storage.storeams.irandomaccessstream gesprocheneswort =等待sprich.getSpeakStreamAsync（" das ist ein beispieltext"，" de"）

    Dim Eingabestream As Windows.Storage.Streams.IInputStream = gesprochenesWort.GetInputStreamAt(0)
    Dim Datenleser As New Windows.Storage.Streams.DataReader(Eingabestream)
    Await Datenleser.LoadAsync(CUInt(gesprochenesWort.Size))
    'Dim Dateipuffer As Byte() = New Byte(CInt(gesprochenesWort.Size) - 1) {}
    Dim Dateipuffer(gesprochenesWort.Size - 1) As Byte
    Datenleser.ReadBytes(Dateipuffer)
    Dim Dateiname As String = "MybestWav.wav"
    Dim Datei = Await Windows.Storage.KnownFolders.MusicLibrary.CreateFileAsync(Dateiname, Windows.Storage.CreationCollisionOption.ReplaceExisting)
    Await Windows.Storage.FileIO.WriteBytesAsync(Datei, Dateipuffer)

;非常感谢您。

最好的问候，basilius