ProgIdAttribute 类

定义

允许用户指定类的 ProgID。Allows the user to specify the ProgID of a class.

public ref class ProgIdAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Class, Inherited=false)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class ProgIdAttribute : Attribute
type ProgIdAttribute = class
    inherit Attribute
Public NotInheritable Class ProgIdAttribute
Inherits Attribute
继承
ProgIdAttribute
属性

示例

下面的示例演示如何对类应用 ProgIdAttributeThe following example demonstrates how to apply ProgIdAttribute on a class. 然后,应用程序将获取 MyClass的所有属性,并打印 ProgIdAttributeValue 属性。The application then gets all attributes of MyClass, and prints the Value property of ProgIdAttribute.

[ClassInterface(ClassInterfaceType::AutoDispatch)]
[ProgId("InteropSample.MyClass")]
public ref class MyClass
{
public:
   MyClass(){}

};

int main()
{
   try
   {
      AttributeCollection^ attributes;
      attributes = TypeDescriptor::GetAttributes( MyClass::typeid );
      ProgIdAttribute^ progIdAttributeObj = dynamic_cast<ProgIdAttribute^>(attributes[ ProgIdAttribute::typeid ]);
      Console::WriteLine( "ProgIdAttribute's value is set to : {0}", progIdAttributeObj->Value );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0}", e->Message );
   }
}
[ClassInterface(ClassInterfaceType.AutoDispatch)]
[ProgId("InteropSample.MyClass")]
public class MyClass
{
    public MyClass() {}
}

class TestApplication
{      
   public static void Main()
   {
      try
      {
         AttributeCollection attributes;
         attributes = TypeDescriptor.GetAttributes(typeof(MyClass));
         ProgIdAttribute progIdAttributeObj = (ProgIdAttribute)attributes[typeof(ProgIdAttribute)];
         Console.WriteLine("ProgIdAttribute's value is set to : " + progIdAttributeObj.Value);
      }         
      catch(Exception e)
      {
         Console.WriteLine("Exception : " + e.Message);
      }
   }
}
   <ClassInterface(ClassInterfaceType.AutoDispatch), ProgId("InteropSample.MyClass")>  _
   Public Class [MyClass]
      
      Public Sub New()
      End Sub
   End Class

   Class TestApplication
      
      Public Shared Sub Main()
         Try
            Dim attributes As AttributeCollection
            attributes = TypeDescriptor.GetAttributes(GetType([MyClass]))
            Dim progIdAttributeObj As ProgIdAttribute = CType(attributes(GetType(ProgIdAttribute)), ProgIdAttribute)
            Console.WriteLine(("ProgIdAttribute's value is set to : " + progIdAttributeObj.Value))
         Catch e As Exception
            Console.WriteLine(("Exception : " + e.Message.ToString()))
         End Try
      End Sub
   End Class
End Namespace 'InteropSample 

注解

可以将此特性应用于类。You can apply this attribute to classes.

通过将命名空间与类型名称相结合,自动为类生成 Progid。ProgIDs are automatically generated for a class by combining the namespace with the type name. 但这可能会产生无效的 ProgID,因为 Progid 限制为39个字符,并且不能包含句点以外的任何标点。This can produce an invalid ProgID however, as ProgIDs are limited to 39 characters and can contain no punctuation other than a period. 在这种情况下,可以使用 ProgIdAttribute将 ProgID 手动分配给该类。In such case, a ProgID can be manually assigned to the class using ProgIdAttribute.

构造函数

ProgIdAttribute(String)

用指定的 ProgID 初始化 ProgIdAttribute 的新实例。Initializes a new instance of the ProgIdAttribute with the specified ProgID.

属性

TypeId

在派生类中实现时,获取此 Attribute 的唯一标识符。When implemented in a derived class, gets a unique identifier for this Attribute.

(继承自 Attribute)
Value

获取类的 ProgID。Gets the ProgID of the class.

方法

Equals(Object)

返回一个值,该值指示此实例是否与指定的对象相等。Returns a value that indicates whether this instance is equal to a specified object.

(继承自 Attribute)
GetHashCode()

返回此实例的哈希代码。Returns the hash code for this instance.

(继承自 Attribute)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
IsDefaultAttribute()

在派生类中重写时,指示此实例的值是否是派生类的默认值。When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(继承自 Attribute)
Match(Object)

当在派生类中重写时,返回一个指示此实例是否等于指定对象的值。When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(继承自 Attribute)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)

显式接口实现

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

将一组名称映射为对应的一组调度标识符。Maps a set of names to a corresponding set of dispatch identifiers.

(继承自 Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

检索对象的类型信息,然后可以使用该信息获取接口的类型信息。Retrieves the type information for an object, which can be used to get the type information for an interface.

(继承自 Attribute)
_Attribute.GetTypeInfoCount(UInt32)

检索对象提供的类型信息接口的数量(0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(继承自 Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

提供对某一对象公开的属性和方法的访问。Provides access to properties and methods exposed by an object.

(继承自 Attribute)

适用于