C# 创建三角网项目(AutoCAD)

【实例截图】

【核心代码】

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using System.Data.OleDb;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;

namespace TriangulationNetwork
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void draw_Click(object sender, EventArgs e)
        {
            //选中当前文档里面的所有点
            DBObjectCollection points = new DBObjectCollection();
            points = Methods.SelectAllPoint();
            Point3dCollection pt = new Point3dCollection();
            foreach (DBPoint item in points)
            {
                pt.Add(item.Position);
            }

            //ConvexHull hull = new ConvexHull(pt);
            //hull.CalculateConvex();
            TriNet triNet = new TriNet(pt);
            triNet.CalculateTriNet();

        }

        /// <summary>
        /// 读取EXCEL文档在CAD上画点
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ExcelBtn_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "打开excel文档";
            openFileDialog1.Filter = "Excle 文件(*.xls)|*xls";
            this.openFileDialog1.FileName = "";
            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string path = this.openFileDialog1.FileName;  //文档路径
                string connection = "Provider=Microsoft.Jet.OLEDB.4.0;"   "Data Source="   path   
                    ";"   "Extended Properties='Excel 8.0;HDR=yes;IMEX=1';";
                string select = "Select * from [sheet1$]";

                OleDbConnection oleDdConn = new OleDbConnection();
                try
                {
                    oleDdConn = new OleDbConnection(connection);
                    oleDdConn.Open();
                    OleDbCommand command = new OleDbCommand(select, oleDdConn);
                    OleDbDataReader read = command.ExecuteReader();

                    while (read.Read())
                    {
                        //读取表格中的值
                        string X = read.GetValue(1).ToString();
                        string Y = read.GetValue(2).ToString();
                        string Z = read.GetValue(3).ToString();

                        //转换为数字
                        double x = Convert.ToDouble(X);
                        double y = Convert.ToDouble(Y);
                        double z = Convert.ToDouble(Z);

                        DrawGeom.DrawDBPoint(x, y, z);
                    }
                }
                catch (Exception)
                {
                    MessageBox.Show("读入错误");
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}