C#.Net中使用HttpWebRequest异步上传大文件

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9 年前已关闭。

Answer 1

如果您必须使用 HttpWebRequest 并假设您的输入数据流不大，您可以通过这样做使上传过程异步。请注意，BeginGetResponse 是实际打开与远程服务器的连接并处理上传的内容。

public void UploadAsync()
{
    var data = GetStream("TestFile.txt");

    var request = (HttpWebRequest)WebRequest.Create(new Uri("http://example.com/UploadData"));
    request.Method = "POST";
    data.CopyTo(request.GetRequestStream());

    request.BeginGetResponse(DataUploadCompleted, request);

    Console.WriteLine("Upload Initiated.");
}

private void DataUploadCompleted(IAsyncResult ar)
{
    var request = (HttpWebRequest)ar.AsyncState;
    var response = request.EndGetResponse(ar);
    Console.WriteLine("Upload Complete.");
}

Answer 2

它必须是 HttpWebRequest 吗？您可以使用 WebClient 对象轻松完成此操作

public void UploadFile(byte[] fileData)
{
    var client = new WebClient();
    client.UploadDataCompleted += client_UploadDataCompleted;
    client.UploadDataAsync(new Uri("http://myuploadlocation.example.com/"), fileData);
}

void client_UploadDataCompleted(object sender, UploadDataCompletedEventArgs e)
{
    if (e.Error != null)
    {
        MessageBox.Show(e.Error.Message);
    }

    byte[] response = e.Result;
}