在隔离存储性能中插入Sqlite DataBase

时间:2013-06-03 14:12:45

标签: c# sqlite windows-store-apps

在我的Windows Strore应用程序中,我在隔离存储中有SQLite数据库 我使用sqlite-net库。
要将数据保存到DataBase,请使用以下命令:

 public static async Task Save<T>(List<T> items) 
    {
        var serverFolder = await ApplicationData.Current.LocalFolder.GetFolderAsync("FolgerName");
        var storageFile = await serverFolder.GetFileAsync("DataBaseName.sqlite");
        using (var db = new SQLiteConnection(storageFile.Path))
        {
            Debug.WriteLine("Save to DataBase " + (typeof(T)) + " started " + DateTime.Now.Minute + ":" + DateTime.Now.Second + ":" + DateTime.Now.Millisecond);
            try 
            {
                foreach (var item in items)
                {
                    db.InsertOrReplace(item);
                }
                Debug.WriteLine("Save to DataBase " + (typeof(T)) + " success " + DateTime.Now.Minute + ":" + DateTime.Now.Second + ":" + DateTime.Now.Millisecond);
            }
            catch
            (SQLiteException ex)
            {
                Debug.WriteLine("Save to DataBase " + (typeof(T)) + " error. Result: " + ex.Result + "  Message: " + ex.Message);
            }
        }
    }

我对表现有疑问:
每个包含60个字段的1226个对象在4个半MINUTES中保存在DataBase中! 这很正常吗? 我怎样才能让它更快?

更新

当我使用时:

  public static async Task Save<T>(List<T> items, Server server) where T : IHasId
    {
        var serverFolder = await ApplicationData.Current.LocalFolder.GetFolderAsync(server.FolgerName);
        var storageFile = await serverFolder.GetFileAsync("kaliti.sqlite");
        using (var db = new SQLiteConnection(storageFile.Path))
        {
            Debug.WriteLine("Save to DataBase " + (typeof(T)) + " started" + String.Format("{0:d/M/yyyy HH:mm:ss}", DateTime.Now));
            try
            {
                var table = db.Table<T>();
                var idList = new List<int>();
                foreach (var i in table)
                {
                    idList.Add(i.Id);
                }
                foreach (var item in items)
                {
                    if (idList.Contains(item.Id))
                        {
                            db.Delete<T>(item.Id);
                        }
                    db.Insert(item);
                }
                Debug.WriteLine("Save to DataBase " + (typeof(T)) + " success" + String.Format("{0:d/M/yyyy HH:mm:ss}", DateTime.Now));
            }
            catch
            (SQLiteException ex)
            {
                Debug.WriteLine("Save to DataBase " + (typeof(T)) + " error. Result: " + ex.Result + "  Message: " + ex.Message);
            }
        }
    }

和DataBase为空我有相同的东西。

1 个答案:

答案 0 :(得分:1)

您需要在事务内运行尽可能多的数据库调用。这样做可以大大加快速度。这是一个示例事务,使用第一个示例中的代码:

...
try 
{
    db.RunInTransaction(() =>
    {
        foreach (var item in items)
        {
            db.InsertOrReplace(item);
        }
    });
...