void Write_XML()
{
try
{
// Write to the Isolated Storage
ListHistory = new List <HistorySong>();
for (int i = 0; i < List_NowPlaying.Count; i++)
{
HistorySong HS = new HistorySong();
HS.CopySong(List_NowPlaying[i]);
HS.Current_Index = Current_NowPlaying;
ListHistory.Add(HS);
}
XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.Indent = true;
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("DataHistory.xml", FileMode.Create))
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(List <HistorySong>));
using (XmlWriter xmlWriter = XmlWriter.Create(stream, xmlWriterSettings))
{
serializer.Serialize(xmlWriter, ListHistory);
}
}
}
}
catch { MessageBox.Show("Có lổi khi lưu vào dữ liệu lịch sử hệ thống!"); }
}
public IActionResult SearchByHistory([FromBody] HistorySong historySong)
{
try
{
using AvailableSongContext availableSongContext = CreateAvailableSongContext(out DbSet <AvailableSong> availableSongs);
// ID で検索
AvailableSong?result = availableSongs.SingleOrDefault(x => x.Id == historySong.AvailableSongId);
if (result == null)
{
// フルパスで検索
// 実際の運用時は外部アプリケーションが予約可能曲データベースを作成することが想定され、AvailableSongId が変更されている場合も想定されるため、パスでも検索する
result = availableSongs.FirstOrDefault(x => x.Path == historySong.Path);
}
if (result == null)
{
// ファイル名で検索
result = availableSongs.FirstOrDefault(x => EF.Functions.Like(x.Path, $"%\\{Path.GetFileName(historySong.Path)}%"));
}
if (result == null)
{
return(NotAcceptable());
}
return(File(JsonSerializer.SerializeToUtf8Bytes(result), ServerConstants.MIME_TYPE_JSON));
}
catch (Exception excep)
{
Debug.WriteLine("曲履歴検索サーバーエラー：\n" + excep.Message);
Debug.WriteLine(" スタックトレース：\n" + excep.StackTrace);
return(InternalServerError());
}
}
// ====================================================================
// public メンバー関数
// ====================================================================
// --------------------------------------------------------------------
// 履歴で曲を検索
// ＜返値＞ (成功した場合は空文字列、エラーの場合はエラーメッセージ, 曲)
// --------------------------------------------------------------------
public async Task <(String, AvailableSong?)> SearchByHistoryAsync(HistorySong historySong)
{
(HttpStatusCode statusCode, AvailableSong? availableSong) = await PostAndGetFromJsonAsync <AvailableSong, HistorySong>(YbdConstants.URL_HISTORY, historySong);
return(statusCode switch
{
HttpStatusCode.NotAcceptable => ("指定された曲が見つかりません。", availableSong),
_ => (DefaultErrorMessage(statusCode), availableSong),
});
