UWP 杂记

UWP用选取文件对话框   http://blog.csdn.net/u011033906/article/details/65448394

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   https://yq.aliyun.com/articles/839

UWP判断文件是否存在    http://blog.csdn.net/lindexi_gd/article/details/51387901

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