/// <summary>
/// Serializes the <paramref name="list"/> <see cref="PlayList"/> to the <paramref name="sw"/> <see cref="StreamWriter"/>
/// </summary>
/// <param name="list">The list to synchronize.</param>
/// <returns></returns>
/// <exception cref="InvalidOperationException"/>
public static void Serialize(StreamWriter sw, PlayList list)
{
StreamWriter sww = new StreamWriter(sw.BaseStream, Encoding.Default);
XmlWriter xw = XmlWriter.Create(sww, new XmlWriterSettings()
{
Indent = true, OmitXmlDeclaration = true, NewLineOnAttributes = true
});
try
{
xmlSerializer.Serialize(xw, list, xmlsns);
}
catch (Exception e)
{
xw.Close();
sw.Close();
throw e;
}
}
/// <summary>
/// Deserialize multiple XML files containing playlist data in list order <b>asynchronously</b>.
/// <para>Returns <see cref="null"/> if all file isn't valid.</para>
/// </summary>
/// <param name="paths">The paths of the playlist files.</param>
/// <param name="ignoreError">If set to true stops exceptions and returns null on error.</param>
/// <param name="progress">Reports the percentage of completed lists.</param>
/// <returns>A new <see cref="PlayList"/></returns>
/// <exception cref="InvalidOperationException"/>
public async static Task <PlayList> DeserializeAsync(string[] paths, IProgress <int> progress = null, bool ignoreError = false)
{
Exception exc = null;
int val = 0;
List <Task <PlayList> > tasks = new List <Task <PlayList> >();
foreach (string path in paths)
{
Task <PlayList> t = Task.Run(() =>
{
try
{
var res = Deserialize(path, ignoreError);
progress.Report((++val * 100) / paths.Count());
return(res);
}
catch (Exception ex)
{
if (exc == null)
{
exc = ex;
}
return(new PlayList());
}
});
tasks.Add(t);
}
var results = new PlayList(await Task.WhenAll(tasks));
if (exc != null)
{
throw exc;
}
return(results);
}
