传递派生对象作为参考参数 [英] Passing a Derived Object as a Reference Parameter

问题描述

如何创建一个方法，将从

基类派生的任何对象作为参考参数？


这样的东西：


void DestroyObject（ref BaseObject obj）

{

obj.Dispose（）;

obj = null;

}


DestroyObject（ref derivedObject1）;

DestroyObject（ref derivedObject2） ;

DestroyObject（ref derivedObject3）;


其中derivedObject1,2和3属于派生自

BaseObject的类类型？


谢谢....


- 布鲁斯

解决方案

"布鲁斯" < bv *************** @ mailblocks.com> écritdansle message de news：
LR ******** @ 4ax.com 。 ..

这样的东西：

void DestroyObject（ref BaseObject obj）
{
obj.Dispose（）;
OBJ = NULL;
}

DestroyObject（参考文献derivedObject1）;
DestroyObject（参考文献derivedObject2）;
DestroyObject（参考文献derivedObject3）;

是的，但我不得不问你为什么要明确处理对象

让垃圾收集器做它的工作？或者你的课程是否持有

对Windows资源或文件句柄的引用？


Joanna


-

Joanna Carter

顾问软件工程师

" Bruce" < bv *************** @ mailblocks.com> écritdansle message de news：
LR ******** @ 4ax.com 。 ..

这样的东西：

void DestroyObject（ref BaseObject obj）
{
obj.Dispose（）;
OBJ = NULL;
}

DestroyObject（参考文献derivedObject1）;
DestroyObject（参考文献derivedObject2）;
DestroyObject（参考文献derivedObject3）;

是的，但我不得不问你为什么要明确处理对象

让垃圾收集器做它的工作？或者你的课程是否持有

对Windows资源或文件句柄的引用？


Joanna


-

Joanna Carter

顾问软件工程师

>其中derivedObject1,2和3属于派生自<的类类型blockquote class =post_quotes> BaseObject？

BaseObject bo = derivedObject1;

DestroyObject（ref bo）;


但我不明白你为什么使用ref参数。如果您使用了

值参数，则可以直接传入derivedObject1。


Mattias


-

Mattias Sj？gren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com

请回复到新闻组。

How can I create a method that will take any object derived from a
base class as a reference parameter?

Something like this:

void DestroyObject(ref BaseObject obj)
{
obj.Dispose();
obj = null;
}

DestroyObject(ref derivedObject1);
DestroyObject(ref derivedObject2);
DestroyObject(ref derivedObject3);

Where derivedObject1, 2 and 3 are of a class type derived from
BaseObject?

Thanks....

--Bruce

解决方案

"Bruce" <bv***************@mailblocks.com > a écrit dans le message de news:
lr********************************@4ax.com...

Something like this:

void DestroyObject(ref BaseObject obj)
{
obj.Dispose();
obj = null;
}

DestroyObject(ref derivedObject1);
DestroyObject(ref derivedObject2);
DestroyObject(ref derivedObject3);

Yes, but I have to ask why you are explicitly disposing of objects instead
of letting the garbage collector do its work ? Or do your classes hold
references to Windows resources or file handles?

Joanna

--
Joanna Carter
Consultant Software Engineer

"Bruce" <bv***************@mailblocks.com > a écrit dans le message de news:
lr********************************@4ax.com...

Something like this:

void DestroyObject(ref BaseObject obj)
{
obj.Dispose();
obj = null;
}

DestroyObject(ref derivedObject1);
DestroyObject(ref derivedObject2);
DestroyObject(ref derivedObject3);

Yes, but I have to ask why you are explicitly disposing of objects instead
of letting the garbage collector do its work ? Or do your classes hold
references to Windows resources or file handles?

Joanna

--
Joanna Carter
Consultant Software Engineer

>Where derivedObject1, 2 and 3 are of a class type derived from

BaseObject?

BaseObject bo = derivedObject1;
DestroyObject(ref bo);

But I don''t understand why you use a ref parameter. If you used a by
value parameter, you could pass in derivedObject1 directly.

Mattias

--
Mattias Sj?gren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

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