CAD图纸转JPG批量处理与设置

private static AcadApplication _app = null;   
public static void Dwg2Pdf(string filename, string destPath)
        {

            AcadDocument doc = null;
            try
            {

                doc = _app.Documents.Open(filename, true);
                doc.SetVariable("sdi", 0);
                doc.SetVariable("Filedia", 0);
                doc.SetVariable("RASTERPREVIEW", 1);
                doc.SetVariable("BACKGROUNDPLOT", 0);
                doc.ActiveLayout.ConfigName = "PublishToWeb JPG.pc3";
                doc.ActiveLayout.UseStandardScale = true;
                doc.ActiveLayout.StandardScale = AcPlotScale.acScaleToFit;
                //设置打印图纸大小
                string[] cMNameLst = (string[])doc.ActiveLayout.GetCanonicalMediaNames();
                foreach (string name in cMNameLst)
                {
                    //查找纸张大小
                    if (name.Contains("3840.00") && name.Contains("3840.00"))
                    {
                        doc.ActiveLayout.CanonicalMediaName = name;
                        break;
                    }
                }
                doc.ActiveLayout.PlotType = AcPlotType.acExtents;
                doc.ActiveLayout.PlotWithLineweights = true;
                doc.ActiveLayout.CenterPlot = true;