List的内存浪费问题？ [英] Memory wasting problem with List?

问题描述

我有一个List< bitmap>，我尝试在该列表中添加大约60个Bitmap对象，并打开任务管理器以查看它使用了多少内存，之后我按下了一些按钮来调用Remove（），RemoveRange，..列表的方法<位图>并查看使用的内存是否减少（释放），但我没有看到我的应用程序使用的内存有任何变化。



你能给我一个解决方案吗？我已经尝试定期使用System.GC.Collect（）（周期约为5秒），似乎工作正常，但有些人说这不好。我不知道为什么，因为它确实有助于我释放未使用的内存，如果不好的话，我想知道另一个解决方案。



你的帮助将是非常感谢！

谢谢。



VipHaLong

解决方案

它''不要自己调用GC - 如果遵守规则则不需要。

在这种情况下，您要添加位图 - 它们是大对象并且支持Dispose方法。

因此，当您从列表中删除它们并停止需要它们时，请将它们删除。

 私有 无效 删除（列表<位图>列表， int  index）
 {
  if （list.Count  >  index）
 {
 Image i = list [index]; 
 list.RemoveAt（index）; 
 i.Dispose（）; 
} 
} 

然而，这不会减少任务管理器中显示的内存 - 一旦.NET扩展堆，它就不会减少它。

I have a List<bitmap>, I tried adding to that list about 60 Bitmap objects, and opened Task Manager to see how much memory it used, after I pressed on some button to call Remove(), RemoveRange, ... methods of the List<bitmap> and see if the used memory was decreased (freed), however I didn''t see any change in memory used by my application.

Could you please give me a solution for this? I have tried using System.GC.Collect() periodically (with a cycle of about 5 seconds), it seems to work OK, but some people say it''s not good. I don''t know why, because it really helps me free unused memory, I would like to know another solution if that is not good.

Your help would be highly appreciated!
Thanks.

VipHaLong

解决方案

It''s not good to call the GC yourself - you shouldn''t need to if you obey the rules.
In this case, you are adding Bitmaps - which are large objects and which support the Dispose method.
So when you remove them from your list and stop needing them, get rid of them then.

private void remove(List<Bitmap> list, int index)
    {
    if (list.Count > index)
        {
        Image i = list[index];
        list.RemoveAt(index);
        i.Dispose();
        }
    }

However that won''t reduce the memory shown in the Task Manager - once .NET expands the heap, it doesn''t reduce it.

这篇关于List的内存浪费问题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！