泛型列表 [英] lists of generics

问题描述

我创建了一个接受类型参数的类。然后，我想将所有这些内容放入一个列表<> ;.


列表<参数< object>> lp = new List< Parameter< object>>（）;


参数< string> licenceKey = new参数< string>（）;

licenceKey.Name =" LICENSEKEY";

licenceKey.Section =" General";

licenceKey.Value =" IVS" ;; //默认3个用户密钥

lp.Add（licenceKey）;


参数< bool> autoInsertDevice = new Parameter< bool>（）;

autoInsertDevice.Name =" AUTOINSERTDEVICE";

autoInsertDevice.Section =" General";

autoInsertDevice.Value = true;

lp.Add（licenceKey）;


我想通过在列表对象中创建列表允许的类型

从要插入的对象派生的类型对象。我错了。

我该如何解决这个问题？

I created a class that accepts a type parameter. I then want to put all
of those into one list<>.

List<Parameter<object>> lp = new List<Parameter<object>>();

Parameter<string> licenceKey = new Parameter<string>();
licenceKey.Name = "LICENSEKEY";
licenceKey.Section = "General";
licenceKey.Value = "IVS"; //default 3 user key
lp.Add(licenceKey);

Parameter<bool> autoInsertDevice = new Parameter<bool>();
autoInsertDevice.Name = "AUTOINSERTDEVICE";
autoInsertDevice.Section = "General";
autoInsertDevice.Value = true;
lp.Add(licenceKey);

I thought by making the type in the list object the list would allow
objects that are typed derived from object to be inserted. I was wrong.
How can i fix this?

推荐答案

http://www.boyet.com/Articles/CSharpCovarianceOne.html

http://www.boyet.com/Articles/CSharpCovarianceOne.html

泛型在编译时是强类型的。它们不像继承的

类那样工作。如果你创建了一个参数< string>，它是一个类型的类，并且

不是Generic类型，它根本不是一个类型，而更像是一个

模板。


-

HTH，


Kevin Spencer

微软MVP

专业Numbskull


提出意见的人是明智的。

与事实争吵的男人是傻子。


" Dan Holmes" <哒******* @ bigfoot.com>在消息中写道

新闻：eO ************** @ TK2MSFTNGP04.phx.gbl ...

Generics are strongly-typed at compile-time. They do not work like inherited
classes. If you create a Parameter<string>, it is a class of that type, and
not of a Generic type, which is not strictly a type at all, but more like a
Template.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Numbskull

The man who questions opinions is wise.
The man who quarrels with facts is a fool.

"Dan Holmes" <da*******@bigfoot.com> wrote in message
news:eO**************@TK2MSFTNGP04.phx.gbl...

我创建了一个类接受类型参数。然后我想把所有这些都放在一个列表中<> ;.

List< Parameter< object>> lp = new List< Parameter< object>>（）;

参数< string> licenceKey = new参数< string>（）;
licenceKey.Name =" LICENSEKEY";
licenceKey.Section =" General";
licenceKey.Value =" IVS" ;; //默认3个用户密钥
lp.Add（licenceKey）;

参数< bool> autoInsertDevice = new Parameter< bool>（）;
autoInsertDevice.Name =" AUTOINSERTDEVICE";
autoInsertDevice.Section =" General";
autoInsertDevice.Value = true;
lp.Add（licenceKey）;

我想通过在列表对象中创建类型，列表将允许插入从对象派生的类型对象。我错了。
我该如何解决这个问题？

I created a class that accepts a type parameter. I then want to put all of
those into one list<>.

List<Parameter<object>> lp = new List<Parameter<object>>();

Parameter<string> licenceKey = new Parameter<string>();
licenceKey.Name = "LICENSEKEY";
licenceKey.Section = "General";
licenceKey.Value = "IVS"; //default 3 user key
lp.Add(licenceKey);

Parameter<bool> autoInsertDevice = new Parameter<bool>();
autoInsertDevice.Name = "AUTOINSERTDEVICE";
autoInsertDevice.Section = "General";
autoInsertDevice.Value = true;
lp.Add(licenceKey);

I thought by making the type in the list object the list would allow
objects that are typed derived from object to be inserted. I was wrong.
How can i fix this?

sd ******** @ gmail.com 写道：

http://www.boyet.com/Articles/CSharpCovarianceOne.html

该文章超时。我确实读过协方差的内容，但我不知道这对我有多大帮助。

that article timed out. I did go read stuff on covariance but i don''t
understand how that helps me.

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