public void AddGradientHatch() { Database db = HostApplicationServices.WorkingDatabase; //创建一个三角形 Polyline triangle = new Polyline(); triangle.CreatePolygon(new Point2d(550, 200), 3, 30); using (Transaction trans = db.TransactionManager.StartTransaction()) { //将三角形添加到模型空间中 ObjectId triangleId = db.AddToModelSpace(triangle); //创建一个ObjectId集合类对象,用于存储填充边界的ObjectId ObjectIdCollection ids = new ObjectIdCollection { triangleId //将三角形的ObjectId添加到边界集合中 }; Hatch hatch = new Hatch(); //创建填充对象 //创建两个Color类变量,分别表示填充的起始颜色(红)和结束颜色(蓝) Color color1 = Color.FromColorIndex(ColorMethod.ByLayer, 1); Color color2 = Color.FromColor(System.Drawing.Color.Blue); //创建渐变填充,与边界无关联 hatch.CreateGradientHatch(HatchGradientName.Cylinder, color1, color2, false); //为填充添加边界(三角形) hatch.AppendLoop(HatchLoopTypes.Default, ids); hatch.EvaluateHatch(true); //计算并显示填充对象 trans.Commit(); //提交更改 } }