怎么动态绘制多段线？

• 回答：

      //与用户交互到在图上提取一个点
      var point1 = mxOcx.GetPoint(false,0,0,"\n 点取开始点:");
      if(point1 == null)
      {
          return;
      }
      //把路径的开始位置移动指定的点
      //参数一为点的X坐标 ，参数二为点的Y坐标
      mxOcx.PathMoveTo(point1.x,point1.y);
      //与用户交互到在图上提取一个点
      var point2 = mxOcx.GetPoint(true,point1.x,point1.y,"\n 点取下一个:");
      if(point2 == null)
      {
          return;
      }
      //建一个数组
      var tmpobj = new Array();
      //把路径下一个点移到指定位置
      //参数一为点的X坐标 ，参数二为点的Y坐标
      mxOcx.PathLineTo(point2.x,point2.y);
      var iCount = 0;
      //绘制一个直线
      //参数一直线的开始点x坐标，参数二直线的开始点y坐标，参数三直线的结束点x坐标，参数四直线的结束点y坐标
      var id = mxOcx.DrawLine(point1.x,point1.y,point2.x,point2.y);
      tmpobj[iCount] = id;
      iCount = iCount + 1;
      point1 = point2;
      while(true)
      {
          var point2 = mxOcx.GetPoint(true,point1.x,point1.y,"\n 点取下一个:");
          if(point2 == null)
          {
              break;
          }
          mxOcx.PathLineTo(point2.x,point2.y);
          var id = mxOcx.DrawLine(point1.x,point1.y,point2.x,point2.y);
          tmpobj[iCount] = id;
          iCount = iCount + 1;
          point1 = point2;
      }
      var i = 0;
      for(;i < iCount;i++)
      {
          //由id删除一个对象
          mxOcx.Erase(tmpobj[i] );
      }
      //把路径变成一个Polyline
     mxOcx.DrawPathToPolyline();