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When uploading or submitting PDF files on certain platforms, you are sometimes faced with the dilemma that the platforms require a specific version of PDF file. If your PDF files fail to meet the requirements, it is necessary to convert them to a different version for compatibility purposes. This article will demonstrate how to programmatically convert PDF between different versions using Spire.PDF for .NET.
Install Spire.PDF for .NET
To begin with, you need to add the DLL files included in the Spire.PDF for.NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.PDF
Change PDF Version in C# and VB.NET
Spire.PDF for .NET supports PDF versions from 1.0 to 1.7. To convert a PDF file to a newer or older version, you can use the PdfDocument.FileInfo.Version property. The following are the detailed steps.
- Create a PdfDocument object.
- Load a sample PDF file using PdfDocument.LoadFromFile() method.
- Change the PDF version to a newer or older version using PdfDocument.FileInfo.Version property.
- Save the result document using PdfDocument.SaveToFile() method.
- C#
- VB.NET
using Spire.Pdf;
namespace ConvertPDFVersion
{
class Program
{
static void Main(string[] args)
{
//Create a PdfDocument object
PdfDocument pdf = new PdfDocument();
//Load a sample PDF file
pdf.LoadFromFile("sample.pdf");
//Change the PDF to version 1.7
pdf.FileInfo.Version = PdfVersion.Version1_7;
//Save the result file
pdf.SaveToFile("PDFVersion.pdf");
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
Document properties (also known as metadata) are a set of information about a document. All Word documents come with a set of built-in document properties, including title, author name, subject, keywords, etc. In addition to the built-in document properties, Microsoft Word also allows users to add custom document properties to Word documents. In this article, we will explain how to add these document properties to Word documents in C# and VB.NET using Spire.Doc for .NET.
- Add Built-in Document Properties to a Word Document
- Add Custom Document Properties to a Word Document
Install Spire.Doc for .NET
To begin with, you need to add the DLL files included in the Spire.Doc for.NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.Doc
Add Built-in Document Properties to a Word Document in C# and VB.NET
A built-in document property consists of a name and a value. You cannot set or change the name of a built-in document property as it's predefined by Microsoft Word, but you can set or change its value. The following steps demonstrate how to set values for built-in document properties in a Word document:
- Initialize an instance of Document class.
- Load a Word document using Document.LoadFromFile() method.
- Get the built-in document properties of the document through Document.BuiltinDocumentProperties property.
- Set values for specific document properties such as title, subject and author through Title, Subject and Author properties of BuiltinDocumentProperties class.
- Save the result document using Document.SaveToFile() method.
- C#
- VB.NET
using Spire.Doc;
namespace BuiltinDocumentProperties
{
class Program
{
static void Main(string[] args)
{
//Create a Document instance
Document document = new Document();
//Load a Word document
document.LoadFromFile("Sample.docx");
//Add built-in document properties to the document
BuiltinDocumentProperties standardProperties = document.BuiltinDocumentProperties;
standardProperties.Title = "Add Document Properties";
standardProperties.Subject = "C# Example";
standardProperties.Author = "James";
standardProperties.Company = "Eiceblue";
standardProperties.Manager = "Michael";
standardProperties.Category = "Document Manipulation";
standardProperties.Keywords = "C#, Word, Document Properties";
standardProperties.Comments = "This article shows how to add document properties";
//Save the result document
document.SaveToFile("StandardDocumentProperties.docx", FileFormat.Docx2013);
}
}
}
Add Custom Document Properties to a Word Document in C# and VB.NET
A custom document property can be defined by a document author or user. Each custom document property should contain a name, a value and a data type. The data type can be one of these four types: Text, Date, Number and Yes or No. The following steps demonstrate how to add custom document properties with different data types to a Word document:
- Initialize an instance of Document class.
- Load a Word document using Document.LoadFromFile() method.
- Get the custom document properties of the document through Document.CustomDocumentProperties property.
- Add custom document properties with different data types to the document using CustomDocumentProperties.Add(string, object) method.
- Save the result document using Document.SaveToFile() method.
- C#
- VB.NET
using Spire.Doc;
using System;
namespace CustomDocumentProperties
{
class Program
{
static void Main(string[] args)
{
//Create a Document instance
Document document = new Document();
//Load a Word document
document.LoadFromFile("Sample.docx");
//Add custom document properties to the document
CustomDocumentProperties customProperties = document.CustomDocumentProperties;
customProperties.Add("Document ID", 1);
customProperties.Add("Authorized", true);
customProperties.Add("Authorized By", "John Smith");
customProperties.Add("Authorized Date", DateTime.Today);
//Save the result document
document.SaveToFile("CustomDocumentProperties.docx", FileFormat.Docx2013);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
A document can have one or more pages. It is probably easy to add a header for all pages of the document. If you want to add the header only for the first page of the document, Spire.Doc for .NET component can provide you an easy and flexible solution to handle it. The following steps will guide how to add a header into the first page of a document using Spire.Doc for .NET component in C#. In the example, the header is got from an existing document.
Step 1: Load a word document, documen1.docx.
Document document1 = new Document();
document1.LoadFromFile("D:\\document1.docx");
Step 2: Get the header of document1.docx.
HeaderFooter header = document1.Sections[0].HeadersFooters.Header;
Step 3: Load another word document which will be added the header, document2.docx.
Document document2 = new Document();
document2.LoadFromFile("D:\\document2.docx");
Step 4: Get the first page header of document2.docx.
HeaderFooter firstPageHeader = document2.Sections[0].HeadersFooters.FirstPageHeader;
Step 5: Specify that the current section has a different header/footer for the first page.
foreach (Section section in document2.Sections)
{
section.PageSetup.DifferentFirstPageHeaderFooter = true;
}
Step 6: Removes all child objects in firstPageHeader.
firstPageHeader.Paragraphs.Clear();
Step 7: Add all child objects of the header to firstPageHeader.
foreach (DocumentObject obj in header.ChildObjects)
{
firstPageHeader.ChildObjects.Add(obj.Clone());
}
Step 8: Save document2.docx to a new document, header.docx.
document2.SaveToFile("D:\\Header.docx"", FileFormat.Docx);
Full code:
Document document1 = new Document();
document1.LoadFromFile(@"..\..\document1.docx");
Document document2 = new Document();
document2.LoadFromFile(@"..\..\document2.docx");
HeaderFooter header = document1.Sections[0].HeadersFooters.Header;
HeaderFooter firstPageHeader = document2.Sections[0].HeadersFooters.FirstPageHeader;
foreach (Section section in document2.Sections)
{
section.PageSetup.DifferentFirstPageHeaderFooter = true;
}
firstPageHeader.Paragraphs.Clear();
foreach (DocumentObject obj in header.ChildObjects)
{
firstPageHeader.ChildObjects.Add(obj.Clone());
}
document2.SaveToFile("Header.docx", FileFormat.Docx);
Screenshots:
document1.docx:
document2.docx:
Header.docx:
