Declarations Class

Artigo
04/29/2015

Manages a list of declarations to be shown in an IntelliSense drop-down list.

This API is not CLS-compliant. The CLS-compliant alternative is [None].

Inheritance Hierarchy

Object
Microsoft.VisualStudio.Package.Declarations

Namespace: Microsoft.VisualStudio.Package
Assemblies:   Microsoft.VisualStudio.Package.LanguageService.12.0 (in Microsoft.VisualStudio.Package.LanguageService.12.0.dll)
  Microsoft.VisualStudio.Package.LanguageService.11.0 (in Microsoft.VisualStudio.Package.LanguageService.11.0.dll)
  Microsoft.VisualStudio.Package.LanguageService.10.0 (in Microsoft.VisualStudio.Package.LanguageService.10.0.dll)
  Microsoft.VisualStudio.Package.LanguageService.9.0 (in Microsoft.VisualStudio.Package.LanguageService.9.0.dll)
  Microsoft.VisualStudio.Package.LanguageService (in Microsoft.VisualStudio.Package.LanguageService.dll)

Syntax

'Declaration
<CLSCompliantAttribute(False)> _
Public MustInherit Class Declarations _
    Implements IDisposable

[CLSCompliantAttribute(false)]
public abstract class Declarations : IDisposable

[CLSCompliantAttribute(false)]
public ref class Declarations abstract : IDisposable

[<AbstractClass>]
[<CLSCompliantAttribute(false)>]
type Declarations =  
    class 
        interface IDisposable 
    end

public abstract class Declarations implements IDisposable

The Declarations type exposes the following members.

Constructors

	Name	Description
	Declarations	Initializes a new instance of the Declarations class.

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Properties

	Name	Description
	LastBestMatch	Gets or sets the name of the item that best matches what has been typed so far.

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Methods

	Name	Description
	Dispose	Frees any resources allocated by the class just before the class object is destroyed.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetBestMatch	Determines the best completion match for the specified value.
	GetCount	When implemented in a derived class, gets the number of items in the list of declarations.
	GetDescription	When implemented in a derived class, gets a description of the specified item.
	GetDisplayText	When implemented in a derived class, gets the text to be displayed in the completion list for the specified item.
	GetGlyph	When implemented in a derived class, gets the image to show next to the specified item.
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetInitialExtent	Returns the initial extent of the text to be completed.
	GetName	When implemented in a derived class, gets the name or text to be inserted for the specified item.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsCommitChar	Determines whether the specified character can be used to complete the specified text.
	IsMatch	Determines whether the specified text matches some or all of the specified item.
	IsPerfectMatch	Determines whether the specified text matches all of the specified item.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OnAutoComplete	Called after the declaration has been committed to the source file. When implemented in a derived class, it provides a completion character which may itself be a trigger for another round of IntelliSense.
	OnCommit	Called to commit the specified item to the source file.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

This abstract class is used to manage a list of identifiers or declarations that are shown in an IntelliSense member completion list. If you intend to support IntelliSense in your application, you must provide a concrete class that derives from this class.

Notes to Implementers

The implemented methods of this class assume that the declarations are stored in a list that is sorted in ascending order.

If you intend to support the IntelliSense completion list, you must derive a class from the Declarations class and implement the following abstract methods:

Abstract Method	Description
GetCount	Returns number of items in declarations list
GetDescription	Returns description for specified item.
GetDisplayText	Returns text to be shown in the completion list for the specified item.
GetGlyph	Returns an index into an image list for the specified item.
GetName	Returns the text to be inserted for the specified item.

Notes to Callers

An instance of this class is returned from the GetDeclarations method in the AuthoringScope class. The GetDeclarations method must be implemented in a class derived from the AuthoringScope class. How your version of the Declarations class is populated is entirely up to you. The Declarations class is populated by the parser.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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