/// <summary> /// Wrap an object and return the transparent proxy which intercepts all calls to the object /// </summary> /// <param name="comObject">An object to intercept</param> /// <param name="type">Interface which defines the method and properties to intercept</param> /// <param name="targetName"></param> /// <returns>Transparent proxy to the real proxy for the object</returns> private static object Wrap(object comObject, Type type, string targetName) { if (null == comObject) { throw new ArgumentNullException(nameof(comObject)); } if (null == type) { throw new ArgumentNullException(nameof(type)); } var wrapper = new ComWrapper(comObject, type, targetName); return(wrapper.GetTransparentProxy()); }
/// <summary> /// Wrap a com object as COMWrapper /// </summary> /// <typeparam name="T">Interface which defines the method and properties to intercept</typeparam> /// <param name="comObject">An object to intercept</param> /// <returns>Transparent proxy to the real proxy for the object</returns> public static T Wrap <T>(object comObject) { var type = typeof(T); if (null == comObject) { throw new ArgumentNullException(nameof(comObject)); } if (null == type) { throw new ArgumentNullException(nameof(T)); } var wrapper = new ComWrapper(comObject, type, type.FullName); return((T)wrapper.GetTransparentProxy()); }
/// <summary> /// Gets or creates a COM object and returns the transparent proxy which intercepts all calls to the object /// The ComProgId can be a normal ComProgId or a GUID prefixed with "clsid:" /// </summary> /// <typeparam name="T">Interface which defines the method and properties to intercept</typeparam> /// <returns>Transparent proxy to the real proxy for the object</returns> /// <remarks>T must be an interface decorated with the <see cref="ComProgIdAttribute" />attribute.</remarks> public static T GetOrCreateInstance <T>() { var type = typeof(T); if (null == type) { throw new ArgumentNullException(nameof(T)); } if (!type.IsInterface) { throw new ArgumentException("The specified type must be an interface.", nameof(T)); } var progIdAttribute = ComProgIdAttribute.GetAttribute(type); if (string.IsNullOrEmpty(progIdAttribute?.Value)) { throw new ArgumentException("The specified type must define a ComProgId attribute.", nameof(T)); } object comObject = null; Type comType = null; var progId = progIdAttribute.Value; var guid = Guid.Empty; // Convert from clsid to Prog ID, if needed if (progId.StartsWith("clsid:")) { guid = new Guid(progId.Substring(6)); var result = ProgIDFromCLSID(ref guid, out progId); if (result != 0) { // Restore progId, as it's overwritten progId = progIdAttribute.Value; try { GetActiveObject(ref guid, IntPtr.Zero, out comObject); } catch (Exception) { Log.Warn().WriteLine("Error {0} getting instance for class id {1}", result, progIdAttribute.Value); } if (comObject == null) { Log.Warn().WriteLine("Error {0} getting progId {1}", result, progIdAttribute.Value); } } else { Log.Info().WriteLine("Mapped {0} to progId {1}", progIdAttribute.Value, progId); } } if (comObject == null && !progId.StartsWith("clsid:")) { try { comObject = Marshal.GetActiveObject(progId); } catch (COMException comE) { if (comE.ErrorCode == MK_E_UNAVAILABLE) { Log.Debug().WriteLine("No current instance of {0} object available.", progId); } else if (comE.ErrorCode == CO_E_CLASSSTRING) { Log.Warn().WriteLine("Unknown progId {0} (application not installed)", progId); return(default(T)); } else { Log.Warn().WriteLine(comE, "Error getting active object for " + progId); } } catch (Exception e) { Log.Warn().WriteLine(e, "Error getting active object for " + progId); } } // Did we get the current instance? If not, try to create a new if (comObject == null) { try { comType = Type.GetTypeFromProgID(progId, true); } catch (Exception ex) { if (Guid.Empty != guid) { comType = Type.GetTypeFromCLSID(guid); } else { Log.Warn().WriteLine(ex, "Error type for " + progId); } } if (comType != null) { try { comObject = Activator.CreateInstance(comType); if (comObject != null) { Log.Debug().WriteLine("Created new instance of {0} object.", progId); } } catch (Exception e) { Log.Warn().WriteLine(e, "Error creating object for " + progId); } } } if (comObject != null) { if (comObject is IDispatch) { var wrapper = new ComWrapper(comObject, type, progIdAttribute.Value); return((T)wrapper.GetTransparentProxy()); } return((T)comObject); } return(default(T)); }