C# NativeMethods.OpenStorage方法代码示例

            /// <summary>
            /// Processes sub storages on the specified storage to capture attachment and recipient data.
            /// </summary>
            /// <param name="storage"> The storage to check for attachment and recipient data. </param>
            protected override void LoadStorage(NativeMethods.IStorage storage)
            {
                base.LoadStorage(storage);

                foreach (var storageStatistic in _subStorageStatistics.Values)
                {
                    // Element is a storage. get it and add its statistics object to the sub storage dictionary
                    var subStorage = storage.OpenStorage(storageStatistic.pwcsName, IntPtr.Zero, NativeMethods.STGM.READ | NativeMethods.STGM.SHARE_EXCLUSIVE,
                        IntPtr.Zero, 0);

                    // Run specific load method depending on sub storage name prefix
                    if (storageStatistic.pwcsName.StartsWith(MapiTags.RecipStoragePrefix))
                    {
                        var recipient = new Recipient(new Storage(subStorage));
                        _recipients.Add(recipient);
                    }
                    else if (storageStatistic.pwcsName.StartsWith(MapiTags.AttachStoragePrefix))
                    {
                        if (Type == MessageType.EmailEncryptedAndMeabySigned)
                            LoadEncryptedAndMeabySignedMessage(subStorage);
                        else
                            LoadAttachmentStorage(subStorage, storageStatistic.pwcsName);
                    }
                    else
                        Marshal.ReleaseComObject(subStorage);
                }

                // Check if there is a named substorage and if so open it and map all the named MAPI properties
                if (_subStorageStatistics.ContainsKey(MapiTags.NameIdStorage))
                {
                    var mappingValues = new List<string>();

                    // Get all the named properties from the _streamStatistics
                    foreach (var streamStatistic in _streamStatistics)
                    {
                        var name = streamStatistic.Value.pwcsName;

                        if (name.StartsWith(MapiTags.SubStgVersion1))
                        {
                            // Get the property value
                            var propIdentString = name.Substring(12, 4);

                            // Convert it to a short
                            var value = ushort.Parse(propIdentString, NumberStyles.HexNumber);

                            // Check if the value is in the named property range (8000 to FFFE (Hex))
                            if (value >= 32768 && value <= 65534)
                            {
                                // If so then add it to perform mapping later on
                                if (!mappingValues.Contains(propIdentString))
                                    mappingValues.Add(propIdentString);
                            }
                        }
                    }

                    // Check if there is also a properties stream and if so get all the named MAPI properties from it
                    if (_streamStatistics.ContainsKey(MapiTags.PropertiesStream))
                    {
                        // Get the raw bytes for the property stream
                        var propBytes = GetStreamBytes(MapiTags.PropertiesStream);

                        for (var i = _propHeaderSize; i < propBytes.Length; i = i + 16)
                        {
                            // Get property identifer located in 3rd and 4th bytes as a hexdecimal string
                            var propIdent = new[] { propBytes[i + 3], propBytes[i + 2] };
                            var propIdentString = BitConverter.ToString(propIdent).Replace("-", string.Empty);

                            // Convert it to a short
                            var value = ushort.Parse(propIdentString, NumberStyles.HexNumber);

                            // Check if the value is in the named property range (8000 to FFFE (Hex))
                            if (value >= 32768 && value <= 65534)
                            {
                                // If so then add it to perform mapping later on
                                if (!mappingValues.Contains(propIdentString))
                                    mappingValues.Add(propIdentString);
                            }
                        }
                    }

                    // Check if there is something to map
                    if (mappingValues.Count <= 0) return;
                    // Get the Named Id Storage, we need this one to perform the mapping
                    var storageStat = _subStorageStatistics[MapiTags.NameIdStorage];
                    var subStorage = storage.OpenStorage(storageStat.pwcsName, IntPtr.Zero,
                        NativeMethods.STGM.READ | NativeMethods.STGM.SHARE_EXCLUSIVE, IntPtr.Zero, 0);

                    // Load the subStorage into our mapping class that does all the mapping magic
                    var mapiToOom = new MapiTagMapper(new Storage(subStorage));

                    // Get the mapped properties
                    _namedProperties = mapiToOom.GetMapping(mappingValues);

                    // Clean up the com object
                    Marshal.ReleaseComObject(subStorage);
                }
//.........这里部分代码省略.........