httpClient 下载

private void button2_Click(object sender, EventArgs e)

{

get();

}

private async Task get()

{

await DownloadFile(@"https://stg-gaminghub.omen.com/launchvideo/Oasis_30s_720p.mp4", "test.mp4");

MessageBox.Show("finished..");

}

public async Task  DownloadFile(string serverFilePath, string targetPath)

{

await Task.Run(() =>

{

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serverFilePath);

WebResponse respone = request.GetResponse();

Stream netStream = respone.GetResponseStream();

using (Stream fileStream = new FileStream(targetPath, FileMode.Create))

{

byte[] read = new byte[1024];

int realReadLen = netStream.Read(read, 0, read.Length);

while (realReadLen > 0)

{

fileStream.Write(read, 0, realReadLen);

realReadLen = netStream.Read(read, 0, read.Length);

}

netStream.Close();

fileStream.Close();

}

});

}

private async void test(string serverFilePath, string targetPath)

{

var client = new HttpClient();

var netStream = await client.GetStreamAsync("");

using (Stream fileStream = new FileStream(targetPath, FileMode.Create))

{

byte[] read = new byte[1024];

int realReadLen = netStream.Read(read, 0, read.Length);

while (realReadLen > 0)

{

fileStream.Write(read, 0, realReadLen);

realReadLen = netStream.Read(read, 0, read.Length);

}

netStream.Close();

fileStream.Close();

}

}