UWP用选取文件对话框   

文件选取器、获取文件属性、写入和读取、保存读取和删除应用数据   

UWP判断文件是否存在    

UWP网络连接中用到异步处理接收数据的方法

/// <summary>

/// 开始接收数据

/// </summary>

public void StartRecive()

{

DataReaderLoadOperation drlo = tcpinput.LoadAsync((uint)buffer.Length);

drlo.Completed = new AsyncOperationCompletedHandler<uint>(DataReadHandler);

}

/// <summary>

/// 用.net core实现接收信息

/// </summary>

/// <param name="operation"></param>

/// <param name="status"></param>

public void DataReadHandler(IAsyncOperation<uint> operation, AsyncStatus status)

{

uint dd1;

int iii = 0;

int length;

try

{

if (status == AsyncStatus.Completed)

{

length = (int)operation.GetResults();

byte[] data = new byte[length];

tcpinput.ReadBytes(data);

Buffer_Manager(data);

DataReaderLoadOperation drlo = tcpinput.LoadAsync((uint)buffer.Length);

drlo.Completed = new AsyncOperationCompletedHandler<uint>(DataReadHandler);

}

else

{

}

}

catch (Exception ex)

{

return;

}

}

其中当远程关闭连接或关闭程序时，status的值为error，而不是触发异常，与.net中socket的机制不一样