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目前想到的实现方式是:
1、直接保存一份数据源SanpShot,在SanpShot里切换。
2、类似命令模式,每个操作实现do,undo接口。
方法1的话,要是数据量大,内存占用大。
2 实现繁琐。
有没有两全其美的实现方式。
针对WPF的第三方库,或控件
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