public static IEnumerable <HistoryPlayItemEntity> GetHistoryPlayList()
{
var xmlRoot = GetLogRootElement();
if (xmlRoot == null)
{
return(null);
}
return(xmlRoot.Elements().Select(e =>
{
var entity = new HistoryPlayItemEntity()
{
MusicId = int.Parse(e.Element("MusicId").Value),
SingerId = int.Parse(e.Element("SingerId").Value),
AlbumId = int.Parse(e.Element("AlbumId").Value),
MusicName = e.Element("MusicName").Value,
SingerName = e.Element("SingerName").Value,
AlbumName = e.Element("AlbumName").Value,
MusicFileUri = new Uri(e.Element("MusicFileUri").Value, UriKind.Relative),
};
var duration = e.Element("Duration").Value;
entity.Duration = TimeSpan.FromMinutes(double.Parse(duration.Substring(0, 2)))
.Add(TimeSpan.FromSeconds(double.Parse(duration.Substring(duration.Length - 2, 2))));
return entity;
}).Reverse());
}
/// <summary>
/// 存储历史播放列表
/// </summary>
/// <param name="entity"></param>
public static void SaveHistoryPlayItem(HistoryPlayItemEntity entity)
{
XElement xmlRoot = null;
Directory.CreateDirectory(_historyFullDirectory);
lock (_obj)
{
if (!File.Exists(_historyPath))
{
xmlRoot = CreateXML().Element(History_Root_Element);
}
if (xmlRoot == null)
{
xmlRoot = GetLogRootElement();
}
var element = xmlRoot.Elements().SingleOrDefault(e => e.Element(nameof(entity.MusicId))?.Value == entity.MusicId.ToString());
if (element != null)
{
element.Remove();
xmlRoot.Add(element);
}
else
{
var log = new XElement(History_Item_Element,
new XElement(nameof(entity.MusicId), entity.MusicId)
, new XElement(nameof(entity.SingerId), entity.SingerId)
, new XElement(nameof(entity.AlbumId), entity.AlbumId)
, new XElement(nameof(entity.MusicName), entity.MusicName)
, new XElement(nameof(entity.SingerName), entity.SingerName)
, new XElement(nameof(entity.AlbumName), entity.AlbumName)
, new XElement(nameof(entity.MusicFileUri), entity.MusicFileUri.OriginalString)
, new XElement(nameof(entity.Duration), entity.Duration.GetMinuteAndSecondPart())
);
xmlRoot.Add(log);
}
xmlRoot.Save(_historyPath);
}
}