DesignerAttribute 类

定义

指定用于为组件实现设计时服务的类。Specifies the class used to implement design-time services for a component.

public ref class DesignerAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Interface, AllowMultiple=true, Inherited=true)]
public sealed class DesignerAttribute : Attribute
type DesignerAttribute = class
    inherit Attribute
Public NotInheritable Class DesignerAttribute
Inherits Attribute
继承
DesignerAttribute
属性

示例

下面的示例创建一个名为 MyForm的类。The following example creates a class called MyForm. MyForm 具有两个属性,即指定此类使用 DocumentDesignerDesignerAttribute 和指定 Form 类别的 DesignerCategoryAttributeMyForm has two attributes, a DesignerAttribute that specifies this class uses the DocumentDesigner, and a DesignerCategoryAttribute that specifies the Form category.

[Designer("System.Windows.Forms.Design.DocumentDesigner, System.Windows.Forms.Design.DLL",
IRootDesigner::typeid),
DesignerCategory("Form")]
ref class MyForm: public ContainerControl{
   // Insert code here.
};
[Designer("System.Windows.Forms.Design.DocumentDesigner, System.Windows.Forms.Design.DLL", 
    typeof(IRootDesigner)),
    DesignerCategory("Form")]
public class MyForm : ContainerControl {
    // Insert code here.
}
<Designer("System.Windows.Forms.Design.DocumentDesigner, System.Windows.Forms.Design.DLL", _
    GetType(IRootDesigner)), DesignerCategory("Form")> _
Public Class MyForm
    
    Inherits ContainerControl
    ' Insert code here.
End Class

下一个示例创建 MyForm的实例。The next example creates an instance of MyForm. 然后,它获取类的属性,提取 DesignerAttribute,并输出设计器的名称。Then it gets the attributes for the class, extracts the DesignerAttribute, and prints the name of the designer.

int main()
{
   // Creates a new form.
   MyForm^ myNewForm = gcnew MyForm;

   // Gets the attributes for the collection.
   AttributeCollection^ attributes = TypeDescriptor::GetAttributes( myNewForm );

   /* Prints the name of the designer by retrieving the DesignerAttribute
       * from the AttributeCollection. */
   DesignerAttribute^ myAttribute = dynamic_cast<DesignerAttribute^>(attributes[ DesignerAttribute::typeid ]);
   Console::WriteLine( "The designer for this class is: {0}", myAttribute->DesignerTypeName );
   return 0;
}
public static int Main() {
    // Creates a new form.
    MyForm myNewForm = new MyForm();
 
    // Gets the attributes for the collection.
    AttributeCollection attributes = TypeDescriptor.GetAttributes(myNewForm);
 
    /* Prints the name of the designer by retrieving the DesignerAttribute
     * from the AttributeCollection. */
    DesignerAttribute myAttribute = 
       (DesignerAttribute)attributes[typeof(DesignerAttribute)];
    Console.WriteLine("The designer for this class is: " + myAttribute.DesignerTypeName);
  
    return 0;
}
Public Shared Function Main() As Integer
    ' Creates a new form.
    Dim myNewForm As New MyForm()
    
    ' Gets the attributes for the collection.
    Dim attributes As AttributeCollection = TypeDescriptor.GetAttributes(myNewForm)
    
    ' Prints the name of the designer by retrieving the DesignerAttribute
    ' from the AttributeCollection. 
    Dim myAttribute As DesignerAttribute = _
        CType(attributes(GetType(DesignerAttribute)), DesignerAttribute)
    Console.WriteLine(("The designer for this class is: " & myAttribute.DesignerTypeName))
    
    Return 0
End Function 'Main

注解

用于设计时服务的类必须实现 IDesigner 接口。The class you use for the design-time services must implement the IDesigner interface.

使用 DesignerBaseTypeName 属性可查找设计器的基类型。Use the DesignerBaseTypeName property to find the designer's base type. 使用 DesignerTypeName 属性可获取与此成员关联的设计器类型的名称。Use the DesignerTypeName property to get the name of the type of designer associated with this member.

有关更多信息,请参阅特性For more information, see Attributes.

构造函数

DesignerAttribute(String)

使用提供设计时服务的类型的名称初始化 DesignerAttribute 类的新实例。Initializes a new instance of the DesignerAttribute class using the name of the type that provides design-time services.

DesignerAttribute(String, String)

使用设计器类型和设计器的基类初始化 DesignerAttribute 类的新实例。Initializes a new instance of the DesignerAttribute class using the designer type and the base class for the designer.

DesignerAttribute(String, Type)

使用设计器类的名称和设计器的基类初始化 DesignerAttribute 类的新实例。Initializes a new instance of the DesignerAttribute class, using the name of the designer class and the base class for the designer.

DesignerAttribute(Type)

使用提供设计时服务的类型初始化 DesignerAttribute 类的新实例。Initializes a new instance of the DesignerAttribute class using the type that provides design-time services.

DesignerAttribute(Type, Type)

使用设计器类型和设计器基类的类型初始化 DesignerAttribute 类的新实例。Initializes a new instance of the DesignerAttribute class using the types of the designer and designer base class.

属性

DesignerBaseTypeName

获取此设计器的基类型名。Gets the name of the base type of this designer.

DesignerTypeName

获取与此设计器特性关联的设计器类型名。Gets the name of the designer type associated with this designer attribute.

TypeId

获取此特性类型的唯一 ID。Gets a unique ID for this attribute type.

方法

Equals(Object)

返回给定对象的值是否等于当前的 DesignerAttributeReturns whether the value of the given object is equal to the current DesignerAttribute.

GetHashCode()

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

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

另请参阅