Essential Presentation是一款.NET类库，可以利用该类库帮助开发人员创建、读取和写入Microsoft PowerPoint 文件，该类库可以用于Windows Forms, WPF, ASP.NET, and ASP.NET MVC等平台下，该产品是一个无图形界面的，完全利用代码对PPT文件进行各种操作，支持打开、修改和保存PPT，可以转换PPT为PDF和图片，可以在PPT文件里创建图表，并且转换PPT文件里的图表为图片。开发人员也可以对PPT文件进行加密和解密、自定义文档属性等。这批文章主要介绍怎么利用Essential Presentation对PPT文件进行转换：

 

1、转换PPT文件为PDF文件

//Opens a PowerPoint presentation file

 

IPresentation presentation = Presentation.Open(fileName);

 

//Creates an instance of ChartToImageConverter and assigns it to ChartToImageConverter property of Presentation

 

presentation.ChartToImageConverter = new ChartToImageConverter();

 

//Converts the PowerPoint presentation into PDF document

 

PdfDocument PDFdocument = PresentationToPdfConverter.Convert(presentation);

 

//Saves the PDF document

 

PDFdocument.Save(@"Sample.pdf");

 

//Closes the PDF document

 

PDFdocument.Close(true);

 

//Closes the presentation

 

presentation.Close();

 

2.转换PPT文件为PDF文件

//Opens a PowerPoint presentation file

 

IPresentation presentation = Presentation.Open(fileName);

 

//Creates an instance of ChartToImageConverter

 

presentation.ChartToImageConverter = new ChartToImageConverter();

 

//Sets the scaling mode as best

 

presentation.ChartToImageConverter.ScalingMode = Syncfusion.OfficeChart.ScalingMode.Best;

 

//Converts the first slide into image

 

Image image = presentation.Slides[0].ConvertToImage(Syncfusion.Drawing.ImageType.Metafile);

 

//Saves the image as file

 

image.Save("slide1.png");

 

//Disposes the image

 

image.Dispose();

 

//Closes the presentation instance

 

presentation.Close();