/// <summary>
/// 保存更新文件集合到文件中
/// </summary>
/// <param name="fc">要保存的更新文件集合</param>
public static void SaveFiles(FileInfoCollection fc)
{
XmlDocument xml = fc.Save();
xml.Save(FileListFile);
}
/// <summary>
/// 从文件中读取更新文件列表
/// </summary>
/// <returns>读取是否成功</returns>
public static bool LoadFiles()
{
if (File.Exists(FileListFile))
{
XmlDocument xml = new XmlDocument();
try
{
xml.Load(FileListFile);
LocalFiles.Load(xml);
LocalFiles.Refresh();//刷新文件信息
SaveFiles();
TempLocalFiles = LocalFiles.Clone();//复制列表
return true;
}
catch
{
LocalFiles.Clear();
}
}
return false;
}
/// <summary>
/// 复制一个相同的文件信息集合
/// </summary>
/// <returns>复制得到的集合</returns>
public new FileInfoCollection Clone()
{
lock (this)
{
FileInfoCollection fc = new FileInfoCollection();
IEnumerator ie = this.GetEnumerator();
while (ie.MoveNext())
{
FileInfo fi = ((DictionaryEntry)ie.Current).Value as FileInfo;
fc.Add(fi.ID, fi);
}
return fc;
}
}
/// <summary>
/// 获取两个文件信息集合的差集,用于得到更新列表
/// </summary>
/// <param name="clientfiles">客户端上传的已存在文件集合</param>
/// <returns>需要更新的文件集合</returns>
public FileInfoCollection GetDownloadList(FileInfoCollection clientfiles)
{
lock (this)
{
FileInfoCollection fc = new FileInfoCollection();
IEnumerator ie = this.GetEnumerator();
while (ie.MoveNext())
{
FileInfo fi = ((DictionaryEntry)ie.Current).Value as FileInfo;
int id = (int)((DictionaryEntry)ie.Current).Key;
if (clientfiles.ContainsKey(id) && clientfiles[id].Equals(fi))
{
//重新取得修改日期及时间
}
else
{
fc.Add(fi.ID, fi);
}
}
if (clientfiles.FileResume != null)//如果存在续传文件
{
if (this.ContainsKey(clientfiles.FileResume.ID) && this[clientfiles.FileResume.ID].Equals(clientfiles.FileResume))//比对续传文件的信息,如果不相同则重新发送
{
fc.SetFiletoResumeInfo(clientfiles.FileResume.ID, clientfiles.FileResume.Date
, clientfiles.FileResume.Length, clientfiles.FileOffSet);
}
}
return fc;
}
}
/// <summary>
/// 创建一个用户信息类
/// </summary>
/// <param name="ip">用户的网络地址</param>
public UserInfo(IPEndPoint ip)
{
_IP = ip;
_ConnectTime = DateTime.Now;
_FilesToDownLoad = new FileInfoCollection();
}
