CAD二次开发--属性块

 1 /// 

 2         /// 块添加属性
 3         /// 
 4         /// 
 5         /// 
 6         public static void AddAttsToBlocks(this ObjectId blockId, List atts)
 7         {
 8             Database db = blockId.Database;//获取数据库对象
 9 
10             BlockTableRecord btr = blockId.GetObject(OpenMode.ForWrite) as BlockTableRecord;
11 
12             foreach (AttributeDefinition att in atts)
13             {
14                 btr.AppendEntity(att);
15 
16                 db.TransactionManager.AddNewlyCreatedDBObject(att, true);
17             }
18 
19             btr.DowngradeOpen();
20         }
21 
22 
23         public static void AddAttsToBlocks(this ObjectId blockId, params AttributeDefinition[] atts)
24         {
25             blockId.AddAttsToBlocks(atts.ToList());
26         }

 1 /// 

 2         /// 插入带属性的参照快
 3         /// 
 4         /// 空间的ID
 5         /// 块要加入的图层名
 6         /// 快参照所属的快名
 7         /// 插入点
 8         /// 缩放比例
 9         /// 旋转角度
10         /// 属性名称与取值
11         /// 
12         public static ObjectId InsertBlockrefence(this ObjectId spaceId, string layer, string blockName, Point3d postion, Scale3d scale, double rotateAngle, Dictionary<string, string> attNameValues)
13         {
14             // 获取数据库对象
15             Database db = spaceId.Database;
16             //以读的方式打开块表
17             BlockTable bt = db.BlockTableId.GetObject(OpenMode.ForRead) as BlockTable;
18             //如果没有blockName d的块，则程序返回
19             if (!bt.Has(blockName))
20 
21                 return ObjectId.Null;//如果没有blockName的块，程序返回
22             //以写的模式打开空间
23             BlockTableRecord space = (BlockTableRecord)spaceId.GetObject(OpenMode.ForWrite);
24             //获取块表的记录ID
25             ObjectId btrId = bt[blockName];
26             //打开块表记录
27             BlockTableRecord record = btrId.GetObject(OpenMode.ForRead) as BlockTableRecord;
28             //创建一个快参照并设置插入点
29             BlockReference br = new BlockReference(postion, bt[blockName]);
30 
31             br.ScaleFactors = scale;
32 
33             br.Layer = layer;
34             br.Rotation = rotateAngle;
35 
36             space.AppendEntity(br);
37             //判断块表记录是否包含属性定义
38             if (record.HasAttributeDefinitions)
39             {
40                 //若包含，则遍历属性定义
41                 foreach (ObjectId id in record)
42                 {
43                     //检查是否是属性定义
44                     AttributeDefinition attDef = id.GetObject(OpenMode.ForRead) as AttributeDefinition;
45 
46                     if (attDef != null)
47                     {
48 
49                         //创建一个新的属性对象
50                         AttributeReference attribute = new AttributeReference();
51                         //从属性定义获取属性对象的对象特性
52                         attribute.SetAttributeFromBlock(attDef, br.BlockTransform);
53                         attribute.Rotation = attDef.Rotation;
54 
55                         attribute.Position = attDef.Position.TransformBy(br.BlockTransform);
56 
57                         attribute.AdjustAlignment(db);
58                         //判断是否包含指定的属性名称
59                         if (attNameValues.ContainsKey(attDef.Tag.ToUpper()))
60                         {
61                             //设置属性值
62                             attribute.TextString = attNameValues[attDef.Tag.ToUpper()].ToString();
63 
64                         }
65                         // 向块参照添加属性对象
66                         br.AttributeCollection.AppendAttribute(attribute);
67                         db.TransactionManager.AddNewlyCreatedDBObject(attribute, true);
68 
69                     }
70                 }
71             }
72             db.TransactionManager.AddNewlyCreatedDBObject(br, true);
73             return br.ObjectId;//返回添加的快参照的ID
74         }

 1  /// 

 2         /// 更新属性名称与取值
 3         /// 
 4         /// 
 5         /// 
 6         public static void UpdateAttributesInBlock(this ObjectId blockRefId, Dictionary<string, string> attNameValues)
 7         {
 8             BlockReference blockRef = blockRefId.GetObject(OpenMode.ForRead) as BlockReference;
 9             if (blockRef != null)
10             {
11                 foreach (ObjectId id in blockRef.AttributeCollection)
12                 {
13                     AttributeReference attref = id.GetObject(OpenMode.ForRead) as AttributeReference;
14                     if (attNameValues.ContainsKey(attref.Tag.ToUpper()))
15                     {
16                         attref.UpgradeOpen();
17                         //设置属性值
18                         attref.TextString = attNameValues[attref.Tag.ToUpper()].ToString();
19 
20                         attref.DowngradeOpen();
21                     }
22                 }
23 
24             }
25 
26         }