我的申请中存在问题。我正在尝试将图像发送到FTP服务器。我能够连接服务器,验证和其他。但是当我尝试发送文件时,如果文件很大(通常大于40-50kb),我得到了System.ObjectDisposedException。
这是我用来发送的代码:
public async Task <byte[]> GetResultingBuffer(IRandomAccessStreamWithContentType readStream, IBuffer buffer)
{
var resultingBuffer = new byte[0];
while (true)
{
IBuffer readBuffer = await readStream.ReadAsync(buffer, 1024, InputStreamOptions.Partial);
if (readBuffer.Length == 0) break;
resultingBuffer = resultingBuffer.Concat(readBuffer.ToArray()).ToArray();
}
return resultingBuffer;
}
public async Task UploadFileAsync(StorageFile file, string destination)
{
using (var stream = await OpenWriteAsync(destination))
{
//
// A more efficient way, maybe a DataReader can be used here
using (var readStream = await file.OpenReadAsync())
{
var buffer = new byte[1024].AsBuffer();
var resultingBuffer = new byte[0];
resultingBuffer = await GetResultingBuffer(readStream, buffer);
await stream.WriteAsync(resultingBuffer.AsBuffer());
await stream.FlushAsync();
}
}
}
我尝试编辑它,然后编辑GetResultingBuffer不是任务,而是在UploadFileAsnc中进行循环。我怎样才能防止配置缓冲区?还有其他解决方案吗?谢谢!
答案 0 :(得分:0)
我用这种方式解决了它
using (var readStream = await file.OpenReadAsync())
{
var buffer = new byte[3000000].AsBuffer();
//var resultingBuffer = new byte[10000000];
Debug.Write("-------");
//while (true)
//{
IBuffer readBuffer = await readStream.ReadAsync(buffer, 3000000, InputStreamOptions.Partial);
//if (readBuffer.Length == 0) break;
//resultingBuffer = resultingBuffer.Concat(readBuffer.ToArray()).ToArray();
//}
// await stream.WriteAsync(resultingBuffer.AsBuffer());
var resultingBuffer = new byte[readBuffer.Length];
readBuffer.CopyTo(resultingBuffer);
await stream.WriteAsync(resultingBuffer.AsBuffer());
}
Debug.Write("-------");
await stream.FlushAsync();