// ActivityLog用のコレクションに接続
public void Connect_aclist(string collectionName)
{
this.Collection_aclist = Database_fl.GetCollection <ActivityLog>(collectionName);
}
// FileLibrary用のコレクションに接続
public void Connect_fllist(string collectionName)
{
this.Collection_fllist = Database_fl.GetCollection <FileLibrary>(collectionName);
}