/// <summary>
/// 取消下载
/// </summary>
public void CloseDown()
{
if (td != null)
{
td.Abort();
}
if (fs != null)
{
fs.Close();
}
if (ns != null)
{
ns.Close();
}
Down_tm = new System.Windows.Forms.Timer();
autoEvent = new AutoResetEvent(false);
string StrFileName = DownPath + name; //根据实际情况设置
CommonsCall.DeletePath(StrFileName);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="localFilePath"></param>
/// <param name="url"></param>
public int DownFile(string url, int threadCount)
{
autoEvent.WaitOne(); //阻塞当前线程，等待通知以继续执行
//await LoadAsync(url,threadCount);
string StrFileName = DownPath + name; //根据实际情况设置
string StrUrl = url; //根据实际情况设置
//打开上次下载的文件或新建文件
long lStartPos = 0;
if (System.IO.File.Exists(StrFileName))//另外如果文件已经下载完毕，就不需要再断点续传了，不然请求的range 会不合法会抛出异常。
{
fs = System.IO.File.OpenWrite(StrFileName);
lStartPos = fs.Length;
fs.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针
}
else
{
fs = new FileStream(StrFileName, System.IO.FileMode.Create);
lStartPos = 0;
}
//打开网络连接
try
{
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);
if (lStartPos > 0)
{
request.AddRange((int)lStartPos); //设置Range值
}
request.Timeout = 20000;
System.Net.WebResponse response = request.GetResponse();
//向服务器请求，获得服务器回应数据流
ns = response.GetResponseStream();
long totalSize = response.ContentLength;
long hasDownSize = 0;
byte[] nbytes = new byte[1024 * 2];//521,2048 etc
int nReadSize = 0;
nReadSize = ns.Read(nbytes, 0, nbytes.Length);
while (nReadSize > 0)
{
fs.Write(nbytes, 0, nReadSize);
downCount++;
nReadSize = ns.Read(nbytes, 0, 1024 * 2);
hasDownSize += nReadSize;
}
fs.Close();
ns.Close();
response.Dispose();
//CommonsCall.Compress(downStuep, StrFileName);
CommonsCall.DeletePath(StrFileName);
GC.Collect();
}
catch (ThreadAbortException e)
{
Thread.Sleep(10000);
DownFile(url, threadCount);
}
catch (Exception ex)
{
Thread.Sleep(10000);
DownFile(url, threadCount);
}
finally
{
threadCount--;
}
return(threadCount);
}
