ViewFilter Class

This class handles various editing and IntelliSense commands for a language service.

Namespace:  Microsoft.VisualStudio.Package
Assemblies:   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

'宣言
<CLSCompliantAttribute(False)> _
<ComVisibleAttribute(True)> _
Public Class ViewFilter _
    Implements IVsTextViewFilter, IVsTextViewEvents, IOleCommandTarget, IDisposable,  _
    IVsExpansionEvents
'使用
Dim instance As ViewFilter

[CLSCompliantAttribute(false)]
[ComVisibleAttribute(true)]
public class ViewFilter : IVsTextViewFilter, IVsTextViewEvents, 
    IOleCommandTarget, IDisposable, IVsExpansionEvents

[CLSCompliantAttribute(false)]
[ComVisibleAttribute(true)]
public ref class ViewFilter : IVsTextViewFilter, 
    IVsTextViewEvents, IOleCommandTarget, IDisposable, IVsExpansionEvents

public class ViewFilter implements IVsTextViewFilter, IVsTextViewEvents, IOleCommandTarget, IDisposable, IVsExpansionEvents

Remarks

In addition to the cursor, Enter, Backspace, and Delete key commands, this base class provides support for the following commands:

Notes to Implementers:

This class already implements all of the support for IntelliSense as well as various advanced editing features. However, if you want to support additional commands in your language service, then you must derive a class from this class and override the appropriate methods:

• QueryCommandStatus (to indicate support for your commands)

• QueryParameterList (if your commands require parameters)

• HandlePreExec (if your commands require some set up)

• HandlePostExec(Guid%, UInt32, UInt32, IntPtr, IntPtr) (if your commands require clean up after execution).

• ExecCommand (to execute the command).

In addition, you must override the CreateViewFilter method in the LanguageService class to create an instance of your version of the ViewFilter class.

Notes to Callers:

This class is instantiated in the CreateViewFilter method of the LanguageService class that is in turn called from the OnNewView method in the CodeWindowManager class when a view is attached to a source file.

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Package.ViewFilter

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

Reference

ViewFilter Members

Microsoft.VisualStudio.Package Namespace