ProvideEditorExtensionAttribute Class

Associates a file extension to a given editor factory when applied to a class that inherits from Package or implements the interface IVsPackage.

Inheritance Hierarchy


Namespace:  Microsoft.VisualStudio.Shell
Assembly:  Microsoft.VisualStudio.Shell.10.0 (in Microsoft.VisualStudio.Shell.10.0.dll)


<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple := True, Inherited := True)> _
Public NotInheritable Class ProvideEditorExtensionAttribute _
    Inherits RegistrationAttribute
[AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = true, Inherited = true)]
public sealed class ProvideEditorExtensionAttribute : RegistrationAttribute
[AttributeUsageAttribute(AttributeTargets::Class, AllowMultiple = true, Inherited = true)]
public ref class ProvideEditorExtensionAttribute sealed : public RegistrationAttribute
[<AttributeUsageAttribute(AttributeTargets.Class, AllowMultiple = true, Inherited = true)>]
type ProvideEditorExtensionAttribute =  
        inherit RegistrationAttribute
public final class ProvideEditorExtensionAttribute extends RegistrationAttribute

The ProvideEditorExtensionAttribute type exposes the following members.


  Name Description
Public method ProvideEditorExtensionAttribute Initializes an instance of ProvideEditorExtensionAttribute.



  Name Description
Public property DefaultName Gets or sets the default name of the editor.
Public property EditorFactoryNotify Determines whether or not the extension should be registered with a EditorFactoryNotify registry value, which associates a file extension with a specific editor factory.
Public property Extension Gets the file extension associated with this editor.
Public property Factory Returns the GUID of the associated factory.
Public property NameResourceID Gets and sets the integer NameResourceID.
Public property Priority Gets the editor's priority as set in the constructor.
Public property ProjectGuid Sets and gets the GUID of the project associated with this editor.
Public property TemplateDir Gets or sets the template directory to be used by the editor factory to retrieve its source files.
Public property TypeId Gets the current instance of this attribute. (Inherited from RegistrationAttribute.)



  Name Description
Public method Equals Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Returns the hash code for this instance. (Inherited from Attribute.)
Protected method GetPackageRegKeyPath Gets the registry path (relative to the registry root of the application) of the VSPackage. (Inherited from RegistrationAttribute.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Public method IsDefaultAttribute When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public method Match When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method Register Called to register this attribute with the given context. The context contains the location where the registration information should be placed. It also contains the type being registered and path information. (Overrides RegistrationAttribute.Register(RegistrationAttribute.RegistrationContext).)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)
Public method Unregister Removes the registration information about a VSPackage when called by an external registration tool such as RegPkg.exe. For more information, see Registering VSPackages. (Overrides RegistrationAttribute.Unregister(RegistrationAttribute.RegistrationContext).)


Explicit Interface Implementations

  Name Description
Explicit interface implemetationPrivate method _Attribute.GetIDsOfNames Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method _Attribute.GetTypeInfo Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method _Attribute.GetTypeInfoCount Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method _Attribute.Invoke Provides access to properties and methods exposed by an object. (Inherited from Attribute.)



This attribute associates a file extension with a given editor factory. The file extension should include the prefixing ".". The editor factory may be specified as either a GUID or a type.

This attribute also associates a priority with the editor factory. For a given file extension, the editor with the highest priority is given the chance to read a file first. If the editor fails to read the file, the remaining editors are used in order of priority. To make a given editor the default, assign a priority greater than 0x60.

This attribute class is only used to provide data for external registration tools. It does not affect runtime behavior.

When to Call

Apply this file extension attribute to a package class that implements an editor factory. The package class must inherit from Package or IVsPackage.

Registry Entries

The following registry entry is created by this attribute:

VSROOT\Editors\{FactoryGuid}\Extensions\Extension = Priority


The GUIDs for the Visual C# and Visual Basic project types are {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} and {F184B08F-C81C-45F6-A57F-5ABD9991F28F}, respectively.

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.

See Also


Microsoft.VisualStudio.Shell Namespace

Other Resources

Determining Which Editor Opens a File in a Project

Managed Package Registration

Registering VSPackages