我可以删除表格的标签 [英] I can remove the label of the form

问题描述

我可以删除表格的标签，以便从内存中清除地址，但是此标签存储在数组中.因此，删除标签后，我想重新索引数组，因为有一个新标签.我该怎么办?

Hi,
I can remove the label of the form so that the address is cleared from memory, but this label was stored in an array. So after deleting a label I want to re-index the array, because there comes a new label. How should I do this?
How do I delete the old array?

推荐答案

您是说要调整数组大小?好吧，你不能.
请参见此处 [

Do you mean resize an array? Well, you cannot.
See here[^] for an alternate solution.

此处很少注意.删除标签时，不会从内存中清除它.当丢失对对象的所有引用时，垃圾收集器将回收内存；它不会立即发生.因此，如果仅删除标签并在存储它的数组中写入null，就可以真正防止内存泄漏:如果您不断循环创建和删除标签而不将其从容器中删除(例如您的数组)，则可以创建真正的内存泄漏.

(有一个误解，认为在垃圾收集系统中不可能发生内存泄漏，这是不正确的，我只是解释了一个重要的泄漏).

Abhinav当然对数组调整大小是正确的(但是，请参阅我对他的答案的评论).您应该使用，例如System.Collection.Generic.List<Label>是您想要可移动的元素.

最后，我严重怀疑带有添加和删除标签的UI设计是否有意义.您应该保留标签，但要更改其属性:Text，如果需要，还可以更改Location.

—SA

Few notes here. When you remove a label, you don not clear it from memory. Garbage Collector re-claim memory when all references to an object are lost; it does not happen immediately. So, if you simply remove label and write null in the array where you store it, you really prevent memory leak: if you kept creating and removing labels in cycle without removing it from the container (like your array), you would create a real memory leak.

(There is a misconception that memory leaks are not possible in garbage-collected systems, which is not true, I just explained an essential leak).

Abhinav is of course right about array resize (however, see my comment to his Answer). You should use, for example System.Collection.Generic.List<Label> is you want removable elements.

Finally, I seriously doubt that your UI design with added and removed labels makes sense. You should rather keep you labels but change their properties: Text and, if you want, Location.

—SA

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