c#.net 给线添加说明文字

betsicn

输出的dwg文件中的线要加上说明：线段长度。

但是添加的线都是根据点添加的，都是水平方向。。。。也不知道如何获取线段长度！

请问要如何才能给线加上长度的说明？？

代码如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.Collections;
using System.Drawing;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
using System.Windows.Forms;

namespace ModelManage
{
   public class cad
    {
        AcadApplication a;
        public void ex(Line[] ls)
        {

            a = new AcadApplicationClass();

            a.Visible = false;
            foreach (Line l in ls)
            {
                double[] s = new double[3]; //声明直线起点坐标
                double[] e = new double[3];//声明直线终点坐标
                s[0] = double.Parse((l.PS.X).ToString());
                s[1] = double.Parse((l.PS.Y).ToString());
                e[0] = double.Parse((l.PE.X).ToString());
                e[1] = double.Parse((l.PE.Y).ToString());
                a.ActiveDocument.ModelSpace.AddLine(s, e);

                a.ActiveDocument.ModelSpace.AddText(l.LineId, s, 5);//添加说明文字

            }
            SaveFileDialog f = new SaveFileDialog();
            f.Filter = "(*.dwg)|*.dwg";

            if (f.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    a.ActiveDocument.SaveAs(f.FileName, AcSaveAsType.acR14_dwg, null);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
            }

            a.Quit();
        }
       
    }
}

初学cad开发，大家多帮下忙

雪山飞狐_lzh

长度说明？没听说过

是标注么？ComApi最好多看下VBA的帮助

betsicn

没有长度说明也行，能加上跟线平行的说明文字就行

雪山飞狐_lzh

先看下这里

http://www.mjtd.com/object/acad2004/idx_object_model.htm