如何在await运算符后阻塞调用程序线程

Question

我正在使用新的HttpClient类将一些数据上传到服务器，因此我不得不使用像await / async这样的新运算符。我有以下问题：如何阻止调用者线程等待第一个文件上传，然后移动到下一个文件。

    public async Task Upload(string filename)
    {
        HttpRequestMessage message = new HttpRequestMessage();

        StreamContent streamContent = new StreamContent(new FileStream(filename, FileMode.Open));
        message.Method = HttpMethod.Put;
        message.Content = streamContent;
        message.RequestUri = new Uri(webURI);

        HttpResponseMessage response = await httpClient.SendAsync(message);

        //I want to reach this point untill I will start to upload next file
        if (response.IsSuccessStatusCode)
        {
            //do something
        }


    }

    void uploadFiles()
    {
        foreach (string filename in filenames)
        {
            Upload(filename);
        }
    }

感谢关注我的问题。

Answer 1

await上传完成后再上传下一个文件：

async void uploadFiles()
{
    foreach (string filename in filenames)
    {
        await Upload(filename);
    }
}