我必须调用Dispose方法上的FolderBrowserDialog？ [英] Do I have to call Dispose method on FolderBrowserDialog?

问题描述

在的FolderBrowserDialog 组件在.NET框架（和打开文件对话框）实现了 IDisposible 接口，这意味着我们要在某个适当的时候调用它的处置方法后，我们用它做什么不好的事情发生（非托管资源泄漏）。

The FolderBrowserDialog component in .NET Framework (and the OpenFileDialog) implements the IDisposible interface, meaning we should call its Dispose method at some appropriate time after we've done with it or something bad happens (unmanaged resource leaks).

在Visual Studio中WinForm设计，如果我将一个的FolderBrowserDialog 组件到一个表格，由设计器生成的code似乎没有照顾这在总之，没有code调用Dispose方法上的的FolderBrowserDialog 。

In Visual Studio WinForm designer, if I drag a FolderBrowserDialog component onto a Form, the code generated by the designer does not seem to take care of this at all, no code calls the Dispose method on the FolderBrowserDialog.

在此相反，如果我将一个定时器（一个在 System.Windows.Forms的命名空间），这还实现了 IDisposible 接口，产生将是code：

In contrast, if I drag a Timer (the one in the System.Windows.Forms namespace) which also implements IDisposible interface, the code generated would be:

this.components = new System.ComponentModel.Container();
this.timer1 = new System.Windows.Forms.Timer(this.components);

通过定时器与容器（this.components）相关联，该定时器保证得到妥善处置容器时disposed-发生在 Form.Close（）或 Form.Dispose（）之称。

那么，为什么的FolderBrowserDialog 组件接收这个特殊的待遇？

So why FolderBrowserDialog component receives this special treatment?

推荐答案

好去处！原因可能是，的FolderBrowserDialog 并没有提供一个构造函数的的IContainer 参数，而定时器一样。

Good spot! The reason is probably that the FolderBrowserDialog does not provide a constructor that takes an IContainer argument, whereas Timer does.

至于为什么会这样，你只能问原来的WinForms设计师。也许这是不是真的设计在设计以这种方式被使用？他们只是意味着它被用在code在使用语句？

As to why this is so, you can only ask the original winforms designers. Maybe it isn't really designed to be used in the designer in this way? They only meant it to be used in code in a using statement?

记住，的FolderBrowserDialog ，其父母在，不实际覆盖处置从组件，所以它实际上并没有的需要的处置任何东西。

Bear in mind that FolderBrowserDialog, and its parents, don't actually override Dispose from Component, so it doesn't actually need to dispose anything.

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