Metro C++编译出错，请大家帮忙看看。

Question

出错代码如下：

bool CImap::ConnectServer()
{
	ImapClient=ref new StreamSocket();
	task<void> (ImapClient->ConnectAsync(hostname,port)).then([this] (task<void> pretask)
	{
		try{
			pretask.get();
		}
		catch (Exception^ ex)
			{
				;
			}

	});
	dr=ref new DataReader(ImapClient->InputStream);
	task<void> (dr->LoadAsync(4)).then([this] (task<void> pretask2)
	{
		try{
			pretask2.get();
		}
		catch (Exception^ ex)
			{
				;
			}

	});
	test=ref new String();
	test=dr->ReadString(dr->UnconsumedBufferLength);



}

错误提示如下：

Answer 1

task<unsigned int> (dr->LoadAsync(4)).then([this] (task<void> pretask2)
...

LoadAsync 返回 DataReaderLoadOperation  并不是一个无参的AsyncAction，而是实现

IAsyncOperation<unsigned int>

的，所以我们需要用 task<unsigned int> 去接

---

Bob Bao [MSFT]
MSDN Community Support | Feedback to us

Answer 2

谢谢！好了！