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icorprofilerinfo2-getclassidinfo2-method.md

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description title ms.date api_name api_location api_type f1_keywords helpviewer_keywords ms.assetid topic_type
Learn more about: ICorProfilerInfo2::GetClassIDInfo2 Method
ICorProfilerInfo2::GetClassIDInfo2 Method
03/30/2017
ICorProfilerInfo2.GetClassIDInfo2
mscorwks.dll
COM
ICorProfilerInfo2::GetClassIDInfo2
GetClassIDInfo2 method [.NET Framework profiling]
ICorProfilerInfo2::GetClassIDInfo2 method [.NET Framework profiling]
0141d582-d066-4d49-8d1f-ae82129a1960
apiref

ICorProfilerInfo2::GetClassIDInfo2 Method

Gets the parent module and metadata token for the open generic definition of the specified class, the ClassID of its parent class, and the ClassID for each type argument, if present, of the class.

Syntax

HRESULT GetClassIDInfo2(  
    [in]  ClassID classId,  
    [out] ModuleID *pModuleId,  
    [out] mdTypeDef *pTypeDefToken,  
    [out] ClassID *pParentClassId,  
    [in]  ULONG32 cNumTypeArgs,  
    [out] ULONG32 *pcNumTypeArgs,  
    [out] ClassID typeArgs[]);

Parameters

classId
[in] The ID of the class for which information will be retrieved.

pModuleId
[out] Pointer to the ID of the parent module for the open generic definition of the specified class.

pTypeDefToken
[out] Pointer to the metadata token for the open generic definition of the specified class.

pParentClassId
[out] Pointer to the ID of the parent class.

cNumTypeArgs
[in] The size of the typeArgs array.

pcNumTypeArgs
[out] Pointer to the total number of available elements.

typeArgs
[out] An array of ClassID values, each of which represents the ID of a type argument of the class. When the method returns, typeArgs will contain some or all the available ClassID values.

Remarks

The GetClassIDInfo2 method is similar to the ICorProfilerInfo::GetClassIDInfo method, but GetClassIDInfo2 obtains additional information about a generic type.

The profiler code can call ICorProfilerInfo::GetModuleMetaData to obtain a metadata interface for a given module. The metadata token that is returned to the location referenced by pTypeDefToken can then be used to access the metadata for the class.

After GetClassIDInfo2 returns, you must verify that the typeArgs buffer was large enough to contain all the ClassID values. To do this, compare the value that pcNumTypeArgs points to with the value of the cNumTypeArgs parameter. If pcNumTypeArgs points to a value that is larger than cNumTypeArgs, allocate a larger typeArgs buffer, update cNumTypeArgs with the new, larger size, and call GetClassIDInfo2 again.

Alternatively, you can first call GetClassIDInfo2 with a zero-length typeArgs buffer to obtain the correct buffer size. You can then set the typeArgs buffer size to the value returned in pcNumTypeArgs and call GetClassIDInfo2 again.

Requirements

Platforms: See System Requirements.

Header: CorProf.idl, CorProf.h

Library: CorGuids.lib

.NET Framework Versions: [!INCLUDEnet_current_v20plus]

See also