/// <summary>
/// 存储数据
/// </summary>
/// <param name="rankname">排行榜名.</param>
/// <param name="isOrder">If set to <c>true</c> 正序/逆序.</param>
public void SaveTheRank(string rankname, bool isOrder = true)
{
L_RankData rankData = RootData.FindChild(rankname);
OrderRank(rankData, isOrder); // 排序
if (rankData != null)
{
XmlTool.SaveData <L_RankData>(rankData, FilePath + rankname);
}
}