两个例子 [英] Two instances
问题描述
我在一个名为Class1
的类中定义了一个对象，这些代码行：
Dim C1为New Class1
.. ..一些代码定义C1的属性
Dim C2为新Class1
C2 = C1
''然后一些代码来定义C2 。
但是用于定义C2属性的代码行也正在改变C1的
属性!!
有什么问题？
Bernard
I have one object defined in a class called Class1
and these lines of code:
Dim C1 as New Class1
.... some code to define the properties of C1
Dim C2 as New Class1
C2=C1
''Then some code to define C2.
BUT the lines of code to define the properties of C2 are changing the C1''s
properties as well !!
What is wrong ?
Bernard
推荐答案
" BernardBourée <是***** @ bouree.net> schrieb：
"Bernard Bourée" <be*****@bouree.net> schrieb:
我在一个名为Class1的类中定义了一个对象
这些代码行：
Dim C1 as New Class1
...定义一些代码C1的属性
Dim C2为新Class1
C2 = C1
''然后用一些代码来定义C2。
但代码行定义属性C2正在改变C1'的属性!!
有什么问题？
I have one object defined in a class called Class1
and these lines of code:
Dim C1 as New Class1
... some code to define the properties of C1
Dim C2 as New Class1
C2=C1
''Then some code to define C2.
BUT the lines of code to define the properties of C2 are changing the C1''s
properties as well !!
What is wrong ?
这行'' C2 = C1''将''C1''和''C2''指向同一个实例
''Class1''。
-
MS Herfried K. Wagner
MVP< URL：http：//dotnet.mvps.org/>
VB< ;网址：http：//dotnet.mvps.org/dotnet/faqs/>
The line ''C2 = C1'' will make ''C1'' and ''C2'' point to the same instance of
''Class1''.
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
"BernardBourée" ; <是***** @ bouree.net>写了
"Bernard Bourée" <be*****@bouree.net> wrote
我在一个名为Class1的类中定义了一个对象
这些代码行：
Dim C1 as New Class1
...一些代码来定义C1的属性
Dim C2为新Class1
C2 = C1
''然后用一些代码来定义C2。
但代码行定义属性C2正在改变C1的属性!!
有什么问题？
I have one object defined in a class called Class1
and these lines of code:
Dim C1 as New Class1
... some code to define the properties of C1
Dim C2 as New Class1
C2=C1
''Then some code to define C2.
BUT the lines of code to define the properties of C2 are changing the C1''s
properties as well !!
What is wrong ?
删除此行：
C2 = C1
该行使您不想要的关联。它使C2引用了
与C1引用相同的Class1对象（真正的Class1对象在某个地方的托管堆中位于
。该行使两个变量都指向
同一个对象）...
LFS
Remove this line:
C2 = C1
That line makes the association you didn''t want. It makes C2 reference the
same Class1 object that C1 references (the real Class1 object is sitting
in the managed heap somewhere. That line made both variables point to
the same object)...
LFS
谢谢Herfried
但是那我怎样才能在C2中获得C1的副本然后能够修改它
而不影响C1？
Bernard
" Herfried K. Wagner [MVP]" <喜*************** @ gmx.at> aécritdansle
message de news： un *** ***********@TK2MSFTNGP14.phx.gbl ...
Thanks Herfried
But then How can I have a copy of C1 in C2 and then been able to modify it
without affecting C1 ?
Bernard
"Herfried K. Wagner [MVP]" <hi***************@gmx.at> a écrit dans le
message de news: un**************@TK2MSFTNGP14.phx.gbl...
"BernardBourée" <是***** @ bouree.net> schrieb：
"Bernard Bourée" <be*****@bouree.net> schrieb:
我在一个名为Class1的类中定义了一个对象
这些代码行：
Dim C1 as New Class1
...定义一些代码C1的属性
Dim C2为新Class1
C2 = C1
''然后用一些代码来定义C2。
但代码行定义属性C2正在改变
C1'的属性!!
有什么问题？
I have one object defined in a class called Class1
and these lines of code:
Dim C1 as New Class1
... some code to define the properties of C1
Dim C2 as New Class1
C2=C1
''Then some code to define C2.
BUT the lines of code to define the properties of C2 are changing the
C1''s properties as well !!
What is wrong ?
行''C2 = C1' '将使''C1''和''C2''指向同一个实例''Class1''。
-
MS Herfried K. Wagner
MVP< URL：http：//dotnet.mvps.org/>
VB< URL：http：//dotnet.mvps.org/dotnet/faqs/>
The line ''C2 = C1'' will make ''C1'' and ''C2'' point to the same instance of
''Class1''.
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
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