CAD由实体句柄返回实体对象（com接口c#语言）

IMxDrawDatabase::HandleToObject

给一个实体的句柄，返回实体的对象，具体详细如下：

参数	说明
[in] BSTR handle	实体的句柄

C#代码得到多线的端点，并成填充对象：

        private void TestFill(String sHandle)

        {

            MxDrawDatabase database = (MxDrawDatabase)axMxDrawX1.GetDatabase();

            MxDrawMcDbObject obj =  database.HandleToObject(sHandle);            

            if (obj == null)                

                return;            

            if (obj is MxDrawPolyline)

            {

                MxDrawPolyline poly = (MxDrawPolyline)obj;                

                int i = 0;               

                 for (; i < poly.NumVerts; i++)

                {

                        MxDrawPoint pt = (MxDrawPoint)poly.GetPointAt(i);                  

                          double dBulge = poly.GetBulgeAt(i);                 

                         if (i == 0)

                        axMxDrawX1.PathMoveTo(pt.x, pt.y);                   

                         else

                            axMxDrawX1.PathLineToEx(pt.x, pt.y, 0.0, 0.0, dBulge);

                }                

                if (i >= 3)

                {

                    axMxDrawX1.PathMakeClosed();

                    axMxDrawX1.DrawPathToHatch(1.0);

                }

            }

 

        }