C＃ServicedComponent Singleton [英] C# ServicedComponent Singleton
问题描述
您好，
我正在编写一个C＃类库，可以通过non.Net
应用程序调用。此类libray的主要类是ServicedComponent
，以便non.Net应用程序可以将此类称为标准COM +
组件。现在，我希望那个班级成为一个单身人士。一旦加载，
值永远不会改变。
我尝试使用这种模式：
公共密封类Singleton
{
private static readonly Singleton instance = new Singleton（）;
private Singleton（）{}
>
public static Singleton Instance
{
get
{
return instance;
}
}
}
然而，它会抛出一个抱怨ServicedComponent的异常
那需要一个公共构造函数。
引发的错误是：
类型未处理的异常
''系统.EnterpriseServices.RegistrationException''发生在
system.enterpriseservices.dll
附加信息：无效的ServicedComponent派生类是
在程序集中找到。
（类必须是公共的，具体的，有一个公共默认构造函数，
并且满足所有其他的Co mVisibility要求）
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" David" <无**** @ sympatico.ca>在消息中写道
news：OB ************** @ TK2MSFTNGP15.phx.gbl ...你好，我正在编写一个可以由非.Net
应用程序调用的C＃类库。此类libray的主类是ServicedComponent
，以便non.Net应用程序可以将此类称为标准COM +
组件。现在，我希望那个班级成为一个单身人士。一旦加载，
值就不会改变。
我尝试使用这种模式：
公共密封类Singleton
{
private static readonly Singleton instance =新的Singleton（）;
私有Singleton（）{}
公共静态单例实例
{
获取
{
返回实例;
}
}
有两种不同的种类单身人士有一种类型的
单身
然而，它抛出一个异常抱怨ServicedComponent
需要一个公共构造函数。
引发的错误是：
系统中未处理的异常
''System.EnterpriseServices.RegistrationException''发生在
system.enterpriseservices.dll
附加信息：在程序集中找到了无效的ServicedComponent派生类。
（类必须是公共的，具体的，具有公共默认构造函数，
并满足所有其他ComVisibility要求）
对。单身人士不能作为COM组件公开。最简单的修复
这是为你的COM客户发布一个外观类。
公共密封类SingletonFacade
{
public SingletonFacade（）{}
public void Foo（）
{
Singleton.instance.Foo（） ;
}
//等
}
David
将您的组件实现为一个池化对象，其中最多/最多为1个对象在池中，并启用JITA。
不要在通话结束后忘记将SetComplete设置为true，否则你将会阻止进一步的通话。
Willy。
大卫 <无**** @ sympatico.ca>在消息中写道
news：OB ************** @ TK2MSFTNGP15.phx.gbl ...你好，我正在编写一个可以由非.Net
应用程序调用的C＃类库。此类libray的主类是ServicedComponent
，以便non.Net应用程序可以将此类称为标准COM +
组件。现在，我希望那个班级成为一个单身人士。一旦加载，
值就不会改变。
我尝试使用这种模式：
公共密封类Singleton
{
private static readonly Singleton instance =新的Singleton（）;
私有Singleton（）{}
公共静态单例实例
{
获取
{
返回实例;
}
}
然而，它引发了一个异常，抱怨ServicedComponent
需要一个公共构造函数。
引发的错误是：
'System.EnterpriseServices.RegistrationException''未处理的异常发生在
system.enterpriseservices.dll
附加信息：在程序集中找到无效的ServicedComponent派生类。
（类必须是公共的，具体的，具有公共默认构造函数，
并满足所有其他ComVisibility要求）
***通过Developersdex发送 http://www.developersdex.com ***
不要只是参加USENET ...获得奖励！
您好！
最简单的解决方法是为您的COM发布一个Facade类
客户。
难道没有人认为它也是适配器类吗？ （我说的是模式
这里:-)
-
venlig hilsen /关心
anders borum
-
Hello,
I''m writing a C# class library that may be called by non-.Net
applications. The main class of this class libray is a ServicedComponent
so that non-.Net application can call this class as a standard COM+
component. Now, I want that class to be a singleton. Once loaded, the
values moslty never change.
I tried using this pattern:
public sealed class Singleton
{
private static readonly Singleton instance = new Singleton();
private Singleton(){}
public static Singleton Instance
{
get
{
return instance;
}
}
}
However, it throws an exception complaining about ServicedComponent
thats needs a public constructor.
The error raised is:
An unhandled exception of type
''System.EnterpriseServices.RegistrationException'' occurred in
system.enterpriseservices.dll
Additional information: Invalid ServicedComponent-derived classes were
found in the assembly.
(Classes must be public, concrete, have a public default constructor,
and meet all other ComVisibility requirements)
*** Sent via Developersdex http://www.developersdex.com ***
Don''t just participate in USENET...get rewarded for it!
"David" <no****@sympatico.ca> wrote in message
news:OB**************@TK2MSFTNGP15.phx.gbl...Hello,
I''m writing a C# class library that may be called by non-.Net
applications. The main class of this class libray is a ServicedComponent
so that non-.Net application can call this class as a standard COM+
component. Now, I want that class to be a singleton. Once loaded, the
values moslty never change.
I tried using this pattern:
public sealed class Singleton
{
private static readonly Singleton instance = new Singleton();
private Singleton(){}
public static Singleton Instance
{
get
{
return instance;
}
}
}
There are two different "kinds" of singletons. There''s the kind of
singleton
However, it throws an exception complaining about ServicedComponent
thats needs a public constructor.
The error raised is:
An unhandled exception of type
''System.EnterpriseServices.RegistrationException'' occurred in
system.enterpriseservices.dll
Additional information: Invalid ServicedComponent-derived classes were
found in the assembly.
(Classes must be public, concrete, have a public default constructor,
and meet all other ComVisibility requirements)
Right. Singletons cannot be exposed as COM components. The easiest fix for
this is to publish a facade class for your COM clients.
public sealed class SingletonFacade
{
public SingletonFacade() {}
public void Foo()
{
Singleton.instance.Foo();
}
//etc
}
David
Implement your component as a pooled object with a min/max of 1 objects in
the pool and enable JITA.
Don''t forget to SetComplete to true when returning after a call else you
will block further calls.
Willy.
"David" <no****@sympatico.ca> wrote in message
news:OB**************@TK2MSFTNGP15.phx.gbl...Hello,
I''m writing a C# class library that may be called by non-.Net
applications. The main class of this class libray is a ServicedComponent
so that non-.Net application can call this class as a standard COM+
component. Now, I want that class to be a singleton. Once loaded, the
values moslty never change.
I tried using this pattern:
public sealed class Singleton
{
private static readonly Singleton instance = new Singleton();
private Singleton(){}
public static Singleton Instance
{
get
{
return instance;
}
}
}
However, it throws an exception complaining about ServicedComponent
thats needs a public constructor.
The error raised is:
An unhandled exception of type
''System.EnterpriseServices.RegistrationException'' occurred in
system.enterpriseservices.dll
Additional information: Invalid ServicedComponent-derived classes were
found in the assembly.
(Classes must be public, concrete, have a public default constructor,
and meet all other ComVisibility requirements)
*** Sent via Developersdex http://www.developersdex.com ***
Don''t just participate in USENET...get rewarded for it!
Hello!
The easiest fix for this is to publish a facade class for your COM
clients.
Couldn''t one argue that it''s an adapter class also? (I''m talking patterns
here :-)
--
venlig hilsen / with regards
anders borum
--
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