/// <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>
/// 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;
}
}
