c# 将dwg文件转化为pdf

belx 2021-12-31 原文

https://blog.csdn.net/mywaster/article/details/50220379

最近做一个项目，要求将dwg文件转化为pdf，开发工具VS2010 + AutoCad 2011，

在网上查了很多代码都有各种问题，解决重重的问题，终于实现了批量转化。

1.首先引入com组件

AutoCAD 2011 Type Library

AutoCAD/ObjectDBX Common18.0 Type Library

2.创建/获取CAD实例

private static AcadApplication _app = null;  
  
        private static void Initialization()  
        {              
            string programID = "AutoCAD.Application.18.1";  
            try  
            {  
                //如果CAD已经打开，就直接获取  
                _app = (AcadApplication)Marshal.GetActiveObject(programID);  
            }  
            catch  
            {  
                try  
                {  
                   //创建新的实例  
                    _app = (AcadApplication)new AcadDocument().Application;                  
                }  
                catch  
                {  
                    throw;  
                }  
            }  
        }

关于AutoCAD2011对应的版本是AutoCAD.Application.18.1

关于创建CAD实例的方法，网上流传的版本是

app = new AcadApplication();

app = new AcadApplicationClass();

经过测试上述两种方法对于AutoCad 2011都报错。。

所以采取了_app = (AcadApplication)new AcadDocument().Application;

3.dwg批量转换成pdf

public static void Dwg2Pdf(IEnumerable<FileInfo> files)  
{  
    Initialization();  
      
    AcadDocument doc = null;  
    string destPath = string.Empty;  
    try  
    {  
        foreach (var f in files)  
        {  
            doc = _app.Documents.Open(f.FullName,true);  
            doc.SetVariable("sdi", 0);  
            doc.SetVariable("Filedia", 0);  
            doc.SetVariable("RASTERPREVIEW", 1);  
            doc.SetVariable("BACKGROUNDPLOT", 0);  
            doc.ActiveLayout.ConfigName = _cfg.AUTOCAD_PC3;  
            doc.ActiveLayout.UseStandardScale = true;  
            doc.ActiveLayout.StandardScale = AcPlotScale.acScaleToFit;  
            doc.ActiveLayout.PlotType = AcPlotType.acExtents;  
            doc.ActiveLayout.CenterPlot = true;  
            doc.ActiveLayout.PlotRotation = AcPlotRotation.ac0degrees;  
            doc.ActiveLayout.PlotType = Autodesk.AutoCAD.Interop.Common.AcPlotType.acExtents;  
            doc.Plot.QuietErrorMode = true;  
            destPath = Path.Combine(f.Directory.FullName, Path.GetFileNameWithoutExtension(f.Name) + ".pdf");  
            doc.Plot.PlotToFile(destPath);                      
            if (doc != null) doc.Close(false);  
        }  
    }  
    catch (System.Exception e)  
    {  
        throw e;  
    }  
    finally  
    {  
        try  
        {  
            doc.Close(false);  
            _app.Quit();  
        }  
        catch { }  
    }  
}