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Споделяне чрез

ICustomQueryInterface Interface

  • Reference

Definition

Namespace:
System.Runtime.InteropServices
Assemblies:
mscorlib.dll, System.Runtime.InteropServices.dll
Assemblies:
netstandard.dll, System.Runtime.InteropServices.dll
Assembly:
System.Runtime.InteropServices.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Caution

ICustomQueryInterface may be unavailable in future releases.

Enables developers to provide a custom, managed implementation of the IUnknown::QueryInterface(REFIID riid, void **ppvObject) method.

C# 
[System.Obsolete("ICustomQueryInterface may be unavailable in future releases.")]
public interface ICustomQueryInterface
C# 
public interface ICustomQueryInterface
C# 
[System.Runtime.InteropServices.ComVisible(false)]
public interface ICustomQueryInterface
Attributes
ObsoleteAttribute ComVisibleAttribute

Remarks

This class permits advanced users to provide a customized managed implementation of the QueryInterface method.

Managed and native applications can use the customized implementation to return a specific interface for a specified interface ID, except for IID_IUnknown. That is, when QueryInterface is called, it will ignore custom implementations if its riid parameter is set to IID_IUnknown. However, you may still return IUnknown as the ppvObject.

Developers can provide custom implementations for all interfaces (except for IUnknown) if they define and implement a valid corresponding interface.

A valid user-defined interface has a v-table layout that matches the unmanaged COM interface exactly, and its InterfaceTypeAttribute is InterfaceIsIUnknown.

Methods

GetInterface(Guid, IntPtr)

Returns an interface according to a specified interface ID.

Applies to

Продукт Версии (остаряло)
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 (Core 1.0, Core 1.1)
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.1, 2.0, 2.1 (1.2, 1.3, 1.4, 1.5, 1.6)
UWP (10.0)