protected internal override void Start()
{
// construct the url
var url = new StringBuilder();
url.Append(_urlPrefix);
if (url[url.Length - 1] != '/')
{
url.Append('/');
}
// zip file name
var fileName = string.Format("{0}.{1}-{2}{3}", _packageNamePrefix, _checkVersionHandler.LocalVersion,
_checkVersionHandler.RemoteVersion,
_packageExtension);
url.AppendFormat(fileName);
// ���̵�ַ
var savePath = Path.Combine(_downloadToPath, fileName);
_savePath = savePath;
_fullUrl = url.ToString();
_down = new HttpDownloader(_fullUrl, _savePath, true);
_down.SetRequsterAsyncHook(_requesterAsyncHook);
_down.SetFinishCallback((_) =>
{
if (_.Error != null)
{
OnError(this, string.Format("{0} : {1}", _fullUrl, _.Error.Message));
}
Finish();
});
_down.Start();
}