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Aspose.Pdf允许你设置PDF文件的特定信息，比如作者、创建日期、主题和标题等。进行着些信息设置,您需要创建一个DocumentInfo对象并单独设置这些属性的值。一旦这些属性值完成设置，你就仅仅需要使用文档对象的save方法保存更新后的文档。

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下面是使用Aspose.Pdf设置PDF文件信息的示例代码

C#

//open document
Document pdfDocument = new Document("input.pdf");
//specify document information
DocumentInfo docInfo = new DocumentInfo(pdfDocument);
docInfo.Author ="Aspose";
docInfo.CreationDate =DateTime.Now;
docInfo.Keywords ="Aspose.Pdf, DOM, API";
docInfo.ModDate =DateTime.Now;
docInfo.Subject ="PDF Information";
docInfo.Title ="Setting PDF Document Information";
//save output document
pdfDocument.Save("output.pdf");

VB.NET

'open document
Dim pdfDocument As New Document("input.pdf")
'specify document information
Dim docInfo As New DocumentInfo(pdfDocument)
docInfo.Author = "Aspose"
docInfo.CreationDate = DateTime.Now
docInfo.Keywords = "Aspose.Pdf, DOM, API"
docInfo.ModDate = DateTime.Now
docInfo.Subject = "PDF Information"
docInfo.Title = "Setting PDF Document Information"
'save output document
pdfDocument.Save("output.pdf")