C# ComTypes.ReleaseFuncDesc方法代码示例

        /// <summary>
        /// Converts a MethodBase[] into a MethodInformation[]
        /// </summary>
        /// <returns>the ComMethodInformation[] corresponding to methods</returns>
        internal static ComMethodInformation[] GetMethodInformationArray(COM.ITypeInfo typeInfo, Collection<int> methods, bool skipLastParameters)
        {
            int methodCount = methods.Count;
            int count = 0;
            ComMethodInformation[] returnValue = new ComMethodInformation[methodCount];

            foreach (int index in methods)
            {
                IntPtr pFuncDesc;
                typeInfo.GetFuncDesc(index, out pFuncDesc);
                COM.FUNCDESC funcdesc = ClrFacade.PtrToStructure<COM.FUNCDESC>(pFuncDesc);
                returnValue[count++] = ComUtil.GetMethodInformation(funcdesc, skipLastParameters);
                typeInfo.ReleaseFuncDesc(pFuncDesc);
            }
            return returnValue;
        }

        private static void ScanSourceInterface(ComTypes.ITypeInfo sourceTypeInfo, ref Dictionary<string, ComEventDesc> events) {
            ComTypes.TYPEATTR sourceTypeAttribute = ComRuntimeHelpers.GetTypeAttrForTypeInfo(sourceTypeInfo);

            for (int index = 0; index < sourceTypeAttribute.cFuncs; index++) {
                IntPtr funcDescHandleToRelease = IntPtr.Zero;

                try {
                    ComTypes.FUNCDESC funcDesc;
                    GetFuncDescForDescIndex(sourceTypeInfo, index, out funcDesc, out funcDescHandleToRelease);

                    // we are not interested in hidden or restricted functions for now.
                    if ((funcDesc.wFuncFlags & (int)ComTypes.FUNCFLAGS.FUNCFLAG_FHIDDEN) != 0) {
                        continue;
                    }
                    if ((funcDesc.wFuncFlags & (int)ComTypes.FUNCFLAGS.FUNCFLAG_FRESTRICTED) != 0) {
                        continue;
                    }

                    string name = ComRuntimeHelpers.GetNameOfMethod(sourceTypeInfo, funcDesc.memid);
                    name = name.ToUpper(System.Globalization.CultureInfo.InvariantCulture);

                    // Sometimes coclass has multiple source interfaces. Usually this is caused by
                    // adding new events and putting them on new interfaces while keeping the
                    // old interfaces around. This may cause name collisioning which we are
                    // resolving by keeping only the first event with the same name.
                    if (events.ContainsKey(name) == false) {
                        ComEventDesc eventDesc = new ComEventDesc();
                        eventDesc.dispid = funcDesc.memid;
                        eventDesc.sourceIID = sourceTypeAttribute.guid;
                        events.Add(name, eventDesc);
                    }
                } finally {
                    if (funcDescHandleToRelease != IntPtr.Zero) {
                        sourceTypeInfo.ReleaseFuncDesc(funcDescHandleToRelease);
                    }
                }
            }
        }

 internal static COM.FUNCDESC GetFuncDesc(COM.ITypeInfo typeinfo, int index)
 {
     IntPtr pFuncDesc;
     typeinfo.GetFuncDesc(index, out pFuncDesc);
     COM.FUNCDESC funcdesc = ClrFacade.PtrToStructure<COM.FUNCDESC>(pFuncDesc);
     typeinfo.ReleaseFuncDesc(pFuncDesc);
     return funcdesc;
 }