c# 实现dxf读取和保存
时间: 2023-07-27 20:14:34 浏览: 136
要在C#中实现dxf文件的读取和保存,可以使用AutoCAD提供的API。以下是实现的基本步骤:
1. 引用AutoCAD.Interop.dll和AutoCAD.Interop.Common.dll到C#项目中。
2. 创建AutoCAD应用程序对象,并打开dxf文件。
```
AutoCAD.Application acApp = new AutoCAD.Application();
acApp.Documents.Open("d:\\test.dxf", false);
```
3. 获取AutoCAD文档对象,通过Document对象获取模型空间和图形对象集合。
```
Document acDoc = acApp.ActiveDocument;
Database acDb = acDoc.Database;
BlockTable acBlkTbl = acDb.BlockTable;
BlockTableRecord acBlkTblRec = acBlkTbl[BlockTableRecord.ModelSpace];
```
4. 通过Entity对象遍历图形对象集合,获取实体数据。
```
foreach (ObjectId acObjId in acBlkTblRec)
{
Entity acEnt = acTrans.GetObject(acObjId, OpenMode.ForRead) as Entity;
if (acEnt != null)
{
// 获取实体数据
}
}
```
5. 保存dxf文件。
```
acDoc.SaveAs("d:\\new.dxf", DwgVersion.AC1024);
```
完整代码示例:
```
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
namespace DXFTest
{
class Program
{
static void Main(string[] args)
{
// 打开dxf文件
AutoCAD.Application acApp = new AutoCAD.Application();
acApp.Documents.Open("d:\\test.dxf", false);
// 获取文档对象
Document acDoc = acApp.ActiveDocument;
Database acDb = acDoc.Database;
BlockTable acBlkTbl = acDb.BlockTable;
BlockTableRecord acBlkTblRec = acBlkTbl[BlockTableRecord.ModelSpace];
// 遍历图形对象集合
foreach (ObjectId acObjId in acBlkTblRec)
{
Entity acEnt = acTrans.GetObject(acObjId, OpenMode.ForRead) as Entity;
if (acEnt != null)
{
// 获取实体数据
Point3d acPt = acEnt.GeometricExtents.MinPoint;
double acWidth = acEnt.GeometricExtents.MaxPoint.X - acEnt.GeometricExtents.MinPoint.X;
double acHeight = acEnt.GeometricExtents.MaxPoint.Y - acEnt.GeometricExtents.MinPoint.Y;
// 打印实体数据
System.Console.WriteLine("Entity: ({0}, {1}), Width: {2}, Height: {3}", acPt.X, acPt.Y, acWidth, acHeight);
}
}
// 保存dxf文件
acDoc.SaveAs("d:\\new.dxf", DwgVersion.AC1024);
// 关闭AutoCAD应用程序
acApp.Quit();
}
}
}
```