Question

在我的项目中，我使用 StreamSocket 发送文件，使用 StreamSocketListener 来接收LAN中的文件。但是当我测试时，我收到的文件大小小于我发送的文件。（例如，我发送的文件大小约为100M，接收文件大小只有2-3M）

我非常困惑，这是我的代码，tks。

发送代码（文件 StorageFile ，item是我的自定义类）

var fileStream = await file.OpenStreamForReadAsync();
var fileInputStream = fileStream.AsInputStream();

StreamSocket socket = new StreamSocket();
HostName serverHost = new HostName(item.Address);
string serverPort = item.Port;
await socket.ConnectAsync(serverHost, serverPort);

uint capacity = 10000000;
Windows.Storage.Streams.Buffer buffer = new Windows.Storage.Streams.Buffer(capacity);

// Send some heads
StreamWriter streamWriter = new StreamWriter(socket.OutputStream.AsStreamForWrite());
await streamWriter.WriteLineAsync("file");
await streamWriter.WriteLineAsync(file.Name);
await streamWriter.FlushAsync();

var outputStream = socket.OutputStream;

while (true)
{
    await fileInputStream.ReadAsync(buffer, capacity, InputStreamOptions.None);

    if (buffer.Length > 0)
    {
        await outputStream.WriteAsync(buffer);
        await outputStream.FlushAsync();
    }
    else
    {
        break;
    }
}

streamWriter.Dispose();
outputStream.Dispose();
socket.Dispose();

接收代码（事件 StreamSocketListener.ConnectionReceived ）

StreamReader streamReader = new StreamReader(args.Socket.InputStream.AsStreamForRead());
string head = await streamReader.ReadLineAsync();

string fileName = await streamReader.ReadLineAsync();

StorageFile file = await DownloadsFolder.CreateFileAsync(fileName, CreationCollisionOption.GenerateUniqueName);
var inputStream = args.Socket.InputStream;

uint capacity = 10000000;
Windows.Storage.Streams.Buffer buffer = new Windows.Storage.Streams.Buffer(capacity);

if (file != null)
{
    CachedFileManager.DeferUpdates(file);

    while (true)
    {
        await inputStream.ReadAsync(buffer, capacity, InputStreamOptions.None);

        if (buffer.Length > 0)
        {
            await FileIO.WriteBufferAsync(file, buffer);
        }
        else
        {
            break;
        }
    }

    FileUpdateStatus updateStatus = await CachedFileManager.CompleteUpdatesAsync(file);
}

Answer 1

我刚刚解决了这个问题。在接收代码中，我使用等待FileIO.WriteBufferAsync（文件，缓冲区）; 将缓冲区写入文件。此方法无法将缓冲区附加到文件。所以我使用 OutputStream.WriteAsync（）来处理它。

使用StreamSocket传输文件并接收错误数据（UWP）

1 个答案: