我修改写在C#中的YouTube下载类使用它在Windows手机上。我的结果如下。但是当我调用dw();我从Web浏览器的文件未找到的异常在行e.Result.Read(缓冲,0,buffer.Length)。我当然知道这意味着什么,但我不知道如何解决它。所以我有两个问题:为什么我的代码不工作?或者有另一种方式在WindowsPhone 7上下载Youtube视频? (如图书馆或免费代码片段...)谢谢。的Youtube类工作不
class YoutubeDownload
{
string youtubeurl;
string fileext;
private WebClient webClient = new WebClient();
public void dw()
{
youtubeurl = "http://www.youtube.com/watch?v=locIxsfpgp4&feature=related";
webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
webClient.DownloadStringAsync(new Uri(youtubeurl));
}
void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
string rawHtml = e.Result;
string getUrl = "http://www.youtube.com/get_video.php?video_id={0}&t={1}";
Regex _titleRegex = new Regex("'VIDEO_TITLE': '(.+)',");
Regex _qualiRegex = new Regex("\"fmt_map\": \"([0-9]{2})");
Regex _idRegex = new Regex("\",\\s*\"t\":\\s*\"([^\"]+)");
Match title = _titleRegex.Match(rawHtml);
Match id = _idRegex.Match(rawHtml);
Match quali = _qualiRegex.Match(rawHtml);
string videotitle = title.Groups[1].Value;
string videoid = youtubeurl.Substring(youtubeurl.IndexOf("?v=") + 3);
string id2 = id.Groups[1].Value.Replace("%3D", "=");
string dlurl = string.Format(getUrl, videoid, id2);
fileext = "flv";
if (rawHtml.Contains("'IS_HD_AVAILABLE': true")) // 1080p/720p
{
dlurl += "&fmt=" + quali.Groups[1].Value;
fileext = "mp4";
}
else
{
dlurl += "&fmt=" + quali.Groups[1].Value;
if (quali.Groups[1].Value == "18") // Medium
fileext = "mp4";
else if (quali.Groups[1].Value == "17") // Mobile
fileext = "3gp";
}
webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
webClient.OpenReadAsync(new Uri(dlurl));
}
void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
var file = IsolatedStorageFile.GetUserStoreForApplication();
file.CreateDirectory("YoutubeDownloader");
using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream("file." + fileext, System.IO.FileMode.Create, file))
{
byte[] buffer = new byte[1024];
while (e.Result.Read(buffer, 0, buffer.Length) > 0)
{
stream.Write(buffer, 0, buffer.Length);
}
}
}
}
除了别的,你的“复制”的方法是不正确 - 你永远*写*'buffer.Length'字节,即使你读过小于... – 2012-02-09 17:34:43
我该怎么办改用? – user1200226 2012-02-09 17:45:37
当你调用'Read',你应该记住的结果,这样,那么你可以使用它在调用写:'而((bytesRead = stream.Read(缓冲,0,buffer.Length))> 0)'。 .. – 2012-02-09 17:46:33