/// <summary> /// Reads an object from the source object's extension dictionary. /// </summary> /// <typeparam name="T">The type of the object to read.</typeparam> /// <param name="source">The source object to read the object from.</param> /// <param name="key">A string that acts as the key in the extension dictionary.</param> /// <exception cref="System.Exception">Thrown when an AutoCAD error occurs.</exception> /// <returns>The object in the extension dictionary.</returns> private static T GetFromXExtensionDictionary <T>(DBObject source, string key) { if (source.ExtensionDictionary.IsNull) { throw new KeyNotFoundException(); } var items = new List <TypedValue>(); Helpers.WrapInTransaction(source, tr => { var dict = (DBDictionary)tr.GetObject(source.ExtensionDictionary, OpenMode.ForRead); Require.NameExists <T>(dict.Contains(key), key); var xRecord = (Xrecord)tr.GetObject(dict.GetAt(key), OpenMode.ForRead); items = xRecord.Data .Cast <TypedValue>() .ToList(); }); if (items.Count == 1 && (items[0].TypeCode != (int)DxfCode.BinaryChunk || typeof(T).Equals(typeof(byte[])))) { return((T)items[0].Value); } else { return(Helpers.Deserialize <T>(items.SelectMany(i => (byte[])i.Value) .ToArray())); } }
/// <summary> /// Reads an object from the source object's extension dictionary. /// </summary> /// <typeparam name="T">The type of the object to read.</typeparam> /// <param name="source">The source object to read the object from.</param> /// <param name="key">A string that acts as the key in the extension dictionary.</param> /// <exception cref="System.Exception">Thrown when an AutoCAD error occurs.</exception> /// <returns>The object in the extension dictionary.</returns> public static T GetData <T>(this DBObject source, string key) { if (source.ExtensionDictionary.IsNull) { throw new KeyNotFoundException(); } try { var items = new TypedValue[0]; Helpers.WrapInTransaction(source, tr => { var dict = (DBDictionary)tr.GetObject(source.ExtensionDictionary, OpenMode.ForRead); if (dict.Contains(key)) { var xRecord = (Xrecord)tr.GetObject(dict.GetAt(key), OpenMode.ForRead); items = xRecord.Data .Cast <TypedValue>() .ToArray(); } else { throw Error.KeyNotFound(key); } }); if (items.Length == 1 && items[0].TypeCode != (int)DxfCode.BinaryChunk) { return((T)items[0].Value); } else { return(Helpers.Deserialize <T>(items.SelectMany(i => (byte[])i.Value) .ToArray())); } } catch (Exception e) { throw Error.AutoCadException(e); } }