使用netdxf（C#）框架实现dxf文件读取与导出坐标

一、新建窗体应用程序DxfToolDemo，将默认的Form1重命名为FormDxfTool

窗体FormDxfTool.Designer.cs设计器源程序如下：


namespace DxfToolDemo
{partial class FormDxfTool{/// <summary>/// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary>/// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗体设计器生成的代码/// <summary>/// 设计器支持所需的方法 - 不要修改/// 使用代码编辑器修改此方法的内容。/// </summary>private void InitializeComponent(){this.rtxtMessage = new System.Windows.Forms.RichTextBox();this.btnOpenDxf = new System.Windows.Forms.Button();this.btnExportCsv = new System.Windows.Forms.Button();this.SuspendLayout();// // rtxtMessage// this.rtxtMessage.Location = new System.Drawing.Point(12, 70);this.rtxtMessage.Name = "rtxtMessage";this.rtxtMessage.Size = new System.Drawing.Size(1102, 529);this.rtxtMessage.TabIndex = 0;this.rtxtMessage.Text = "";// // btnOpenDxf// this.btnOpenDxf.Font = new System.Drawing.Font("宋体", 15F);this.btnOpenDxf.Location = new System.Drawing.Point(23, 12);this.btnOpenDxf.Name = "btnOpenDxf";this.btnOpenDxf.Size = new System.Drawing.Size(127, 43);this.btnOpenDxf.TabIndex = 1;this.btnOpenDxf.Text = "打开Dxf文件";this.btnOpenDxf.UseVisualStyleBackColor = true;this.btnOpenDxf.Click += new System.EventHandler(this.btnOpenDxf_Click);// // btnExportCsv// this.btnExportCsv.Font = new System.Drawing.Font("宋体", 15F);this.btnExportCsv.Location = new System.Drawing.Point(185, 12);this.btnExportCsv.Name = "btnExportCsv";this.btnExportCsv.Size = new System.Drawing.Size(182, 43);this.btnExportCsv.TabIndex = 2;this.btnExportCsv.Text = "导出坐标为.CSV";this.btnExportCsv.UseVisualStyleBackColor = true;this.btnExportCsv.Click += new System.EventHandler(this.btnExportCsv_Click);// // FormDxfTool// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(1126, 611);this.Controls.Add(this.btnExportCsv);this.Controls.Add(this.btnOpenDxf);this.Controls.Add(this.rtxtMessage);this.Name = "FormDxfTool";this.Text = "Dxf转化工具【CAD文件转坐标】";this.Load += new System.EventHandler(this.FormDxfTool_Load);this.ResumeLayout(false);}#endregionprivate System.Windows.Forms.RichTextBox rtxtMessage;private System.Windows.Forms.Button btnOpenDxf;private System.Windows.Forms.Button btnExportCsv;}
}

二、右键项目DxfToolDemo，管理NuGet程序包，输入关键字netDxf,下载该程序包

三、netDxf框架关键类型说明：

关键结构 netDxf.Vector3
可以认为是立体三维坐标(x,y,z)
关键结构 netDxf.Vector2
可以认为是平面二维坐标(x,y)

DxfDocument用于读写dxf文件

关键函数Load()用于加载文件

添加实体：dxfDocument.Entities.Add(EntityObject entity);

关键函数Save()用于保存文件

关键属性：
Entities:
对应类型 netDxf.Collections.DrawingEntities

密封类DrawingEntities由一系列【点、线、圆等】集合组成，允许直接访问与图形中实体相关的操作

对应的各种实体EntityObject说明：
netDxf.Entities.EntityObject:
Gets the complete list entities contained in the active layout.
抽象类，以下所有实体对象的父类

netDxf.Entities.PolyfaceMesh:
Represents a polyface mesh entity.

netDxf.Entities.Text:
Gets the list of texts in the active layout.

netDxf.Entities.MText:
Gets the list of multiline texts in the active layout.

netDxf.Entities.Hatch:
Gets the list of hatches in the active layout.

netDxf.Entities.Image:
Gets the list of images in the active layout.

netDxf.Entities.Mesh:
Gets the list of mesh in the active layout.

netDxf.Entities.Leader:
Gets the list of leader in the active layout.

netDxf.Entities.Point:
Gets the list of points in the active layout.

netDxf.Entities.Tolerance:
Gets the list of tolerance in the active layout.

netDxf.Entities.MLine:
Gets the list of multilines in the active layout.

netDxf.Entities.Dimension:
Gets the list of dimensions in the active layout.

netDxf.Entities.Spline:
Gets the list of splines in the active layout.

netDxf.Entities.Ray:
Gets the list of rays in the active layout.

netDxf.Entities.Viewport:
Gets the list of viewports in the active layout.

netDxf.Entities.XLine:
Gets the list of extension lines in the active layout.

netDxf.Entities.Underlay:
Gets the list of underlay in the active layout.

netDxf.Entities.PolygonMesh:
Gets the list of polygon meshes in the active layout.

netDxf.Entities.AttributeDefinition:
Gets the list of attribute definitions in the active layout.

netDxf.Entities.Polyline3D:
Gets the list of polylines in the active layout.

netDxf.Entities.Arc:
Gets the list of arcs contained in the active layout.

netDxf.Entities.Ellipse:
Gets the list of ellipses in the active layout.

netDxf.Entities.Wipeout:
Gets the list of wipeouts in the active layout.

netDxf.Entities.Face3D:
Gets the list of 3d faces in the active layout.

netDxf.Entities.Circle:
Gets the list of circles in the active layout.

netDxf.Entities.Trace:
Gets the list of traces in the active layout.

netDxf.Entities.Insert:
Gets the list of inserts in the active layout.

netDxf.Entities.Line:
Gets the list of lines in the active layout.

netDxf.Entities.Shape:
Gets the list of shapes in the active layout.

netDxf.Entities.Polyline2D:
Gets the list of polylines in the active layout.

netDxf.Entities.Solid:
Gets the list of solids in the active layout.

四、新建csv导出类CsvUtil，

CsvUtil.cs源程序如下：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace DxfToolDemo
{public class CsvUtil{/// <summary>/// 写CSV日志 按列显示/// </summary>/// <param name="fileName"></param>/// <param name="coordList">元组：圆心坐标，半径，模板名</param>/// <returns></returns>public static bool WriteCoordinateLogCsv(string fileName, List<Tuple<netDxf.Vector3, double, string>> coordList){if (coordList == null || coordList.Count == 0) {return false;}try{string directoryPath = Path.GetDirectoryName(fileName);if (!Directory.Exists(directoryPath)){Directory.CreateDirectory(directoryPath);}string columnContents = "模板名,极柱序号,圆心X坐标,圆心Y坐标,圆心Z坐标,圆心半径\r\n";if (!File.Exists(fileName)){File.AppendAllText(fileName, columnContents, Encoding.Default);}StringBuilder sb = new StringBuilder();using (StreamWriter write = new StreamWriter(fileName, true, Encoding.Default)){for (int i = 0; i < coordList.Count; i++){sb = new StringBuilder();sb.Append($"{ProcessPunctuationForCsv(coordList[i].Item3)},");sb.Append($"{i + 1},");sb.Append($"{coordList[i].Item1.X},");sb.Append($"{coordList[i].Item1.Y},");sb.Append($"{coordList[i].Item1.Z},");sb.Append($"{coordList[i].Item2}");write.WriteLine(sb.ToString());}                    }return true;}catch (Exception ex){System.Windows.Forms.MessageBox.Show("CSV文件写入失败：" + ex.Message);return false;}}/// <summary>/// 处理csv文件中的双引号和逗号，使其在Excel中完美显示为一个单元格/// 斯内科/// </summary>/// <param name="srcStr"></param>/// <returns></returns>private static string ProcessPunctuationForCsv(string srcStr){if (srcStr == null){return string.Empty;}bool quoteFlag = false;//是否添加过双引号//如果存在双引号，需要将字符串的一个双引号 替换为 两个双引号。并且需要在字符串的前后加上双引号if (srcStr.Contains("\"")){srcStr = srcStr.Replace("\"", "\"\"");srcStr = "\"" + srcStr + "\"";quoteFlag = true;}//如果只存在逗号（不存在引号），将前后加引号即可if (srcStr.Contains(",") && !quoteFlag){srcStr = "\"" + srcStr + "\"";}return srcStr;}}
}

五、窗体程序如下：

FormDxfTool.cs源程序：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;using netDxf;
using netDxf.Collections;
using netDxf.Entities;namespace DxfToolDemo
{public partial class FormDxfTool : Form{public FormDxfTool(){InitializeComponent();rtxtMessage.ReadOnly = true;            }/// <summary>/// 显示推送消息/// </summary>/// <param name="msg"></param>private void DisplayMessage(string msg){this.BeginInvoke(new Action(() =>{if (rtxtMessage.TextLength > 20480){rtxtMessage.Clear(); }rtxtMessage.AppendText($"{DateTime.Now.ToString("HH:mm:ss.fff")}->{msg}\n");rtxtMessage.ScrollToCaret();}));}private void btnOpenDxf_Click(object sender, EventArgs e){rtxtMessage.Clear();OpenFileDialog openFileDialog = new OpenFileDialog();openFileDialog.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory;openFileDialog.Filter = "dxf|*.dxf|All|*.*";DialogResult dialog = openFileDialog.ShowDialog();if (dialog != DialogResult.OK){return;}string fileName = openFileDialog.FileName;//AppDomain.CurrentDomain.BaseDirectory + "testFile\\蓝本-CAD.dxf"DisplayMessage($"CAD文件dxf路径为【{fileName}】");DxfDocument dxfDocument = DxfDocument.Load(fileName);DisplayMessage($"活动布局的名称为【{dxfDocument.Entities.ActiveLayout}】");rtxtMessage.Tag = dxfDocument.Entities;IEnumerable<Circle> circles = dxfDocument.Entities.Circles;int circleCount = circles.Count();DisplayMessage($"读取到圆Circle的个数为【{circleCount}】");for (int i = 0; i < circleCount; i++){Circle circle = circles.ElementAt(i);DisplayMessage($"\x20\x20圆【{(i + 1).ToString("D3")}】,圆心坐标【({circle.Center})】,半径【{circle.Radius}】");}            }private void btnExportCsv_Click(object sender, EventArgs e){DrawingEntities drawingEntities = rtxtMessage.Tag as DrawingEntities;if (drawingEntities == null) {return;}List<Tuple<Vector3, double, string>> coordList = new List<Tuple<Vector3, double, string>>();IEnumerable<Circle> circles = drawingEntities.Circles;int circleCount = circles.Count();//找出所有的圆for (int i = 0; i < circleCount; i++){Circle circle = circles.ElementAt(i);//元组：圆心坐标，半径，活动设计名coordList.Add(Tuple.Create(circle.Center, circle.Radius, drawingEntities.ActiveLayout));}string fileName = AppDomain.CurrentDomain.BaseDirectory + "testFile\\蓝本.csv";bool result = CsvUtil.WriteCoordinateLogCsv(fileName, coordList);MessageBox.Show($"导出csv文件结果【{result}】\n路径：{fileName}");}private void FormDxfTool_Load(object sender, EventArgs e){/** 1、读取dxf文件的思路
新建DxfDocument对象-调用Load方法读取对应地址的dxf文件并保存在新建的DxfDocument对象中-从新建的DxfDocument对象中读取对应的元素
读取dxf文件：
DxfDocument dxf = DxfDocument.Load("蓝本.dxf");关键结构 netDxf.Vector3可以认为是立体三维坐标(x,y,z)
关键结构 netDxf.Vector2可以认为是平面二维坐标(x,y)读取文件中的核心属性：
Entities:
对应类型 netDxf.Collections.DrawingEntities密封类DrawingEntities由一系列【点、线、圆等】集合组成，允许直接访问与图形中实体相关的操作
netDxf.Entities.EntityObject:Gets the complete list entities contained in the active layout.抽象类，以下所有实体对象的父类netDxf.Entities.PolyfaceMesh:Represents a polyface mesh entity.netDxf.Entities.Text:Gets the list of texts in the active layout.netDxf.Entities.MText:       Gets the list of multiline texts in the active layout.netDxf.Entities.Hatch:       Gets the list of hatches in the active layout.netDxf.Entities.Image:     Gets the list of images in the active layout.netDxf.Entities.Mesh:      Gets the list of mesh in the active layout.netDxf.Entities.Leader:        Gets the list of leader in the active layout.netDxf.Entities.Point:Gets the list of points in the active layout.netDxf.Entities.Tolerance:Gets the list of tolerance in the active layout.netDxf.Entities.MLine:Gets the list of multilines in the active layout.netDxf.Entities.Dimension:Gets the list of dimensions in the active layout.netDxf.Entities.Spline:Gets the list of splines in the active layout.netDxf.Entities.Ray:Gets the list of rays in the active layout.netDxf.Entities.Viewport:        Gets the list of viewports in the active layout.netDxf.Entities.XLine:Gets the list of extension lines in the active layout.netDxf.Entities.Underlay:Gets the list of underlay in the active layout.netDxf.Entities.PolygonMesh:Gets the list of polygon meshes in the active layout.netDxf.Entities.AttributeDefinition:Gets the list of attribute definitions in the active layout.netDxf.Entities.Polyline3D:Gets the list of polylines in the active layout.netDxf.Entities.Arc:Gets the list of arcs contained in the active layout. netDxf.Entities.Ellipse:Gets the list of ellipses in the active layout.netDxf.Entities.Wipeout:Gets the list of wipeouts in the active layout. netDxf.Entities.Face3D:Gets the list of 3d faces in the active layout.netDxf.Entities.Circle:Gets the list of circles in the active layout.netDxf.Entities.Trace:Gets the list of traces in the active layout.netDxf.Entities.Insert:Gets the list of inserts in the active layout.netDxf.Entities.Line:Gets the list of lines in the active layout.netDxf.Entities.Shape:Gets the list of shapes in the active layout.netDxf.Entities.Polyline2D:Gets the list of polylines in the active layout.netDxf.Entities.Solid:Gets the list of solids in the active layout.            */}}
}