Get Started - Load and Edit a PDF File

• Jul 13, 2020
• 4 minutes to read

Important

You need a license to the DevExpress Office File API or DevExpress Universal Subscription to use these examples in production code. Refer to the DevExpress Subscription page for pricing information.

Perform the following steps to get started with the non-visual PDF processing component:

1. Run Microsoft Visual Studio and create a new Console Application (.NET Framework) project.

2. Right-click References in the Solution Explorer and select Add Reference… in the invoked context menu.

   

3. Add references to the following libraries:

   • DevExpress.Data.v19.2;
   • DevExpress.Docs.v19.2;
   • DevExpress.Pdf.v19.2.Core;
   • DevExpress.Pdf.v19.2.Drawing.

4. Paste the code below in the Main method of the Program.cs file (Main procedure of the Module1.vb file for Visual Basic).

   Note

   A complete sample project is available at https://github.com/DevExpress-Examples/how-to-rotate-pdf-pages-t114305

   Program.cs

   using DevExpress.Pdf;
   
   namespace PdfPageRotationExample
   {
       class Program
       {
           static void Main(string[] args)
           {
               using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
               {
                   pdfDocumentProcessor.LoadDocument("..\\..\\docs\\TextRotate.pdf");
                   int angle = 0;
                   foreach (PdfPage page in pdfDocumentProcessor.Document.Pages) {
                       angle = (angle + 90) % 360;
                       page.Rotate = angle;
                   }
                   pdfDocumentProcessor.SaveDocument("..\\..\\docs\\Rotated.pdf");
               }
           }
       }
   }
   

   Program.vb

   Imports DevExpress.Pdf
   
   Namespace PdfPageRotationExample
   
       Friend Class Program
           Shared Sub Main(ByVal args() As String)
               Using pdfDocumentProcessor As New PdfDocumentProcessor()
                   pdfDocumentProcessor.LoadDocument("..\..\docs\TextRotate.pdf")
                   Dim angle As Integer = 0
                   For Each page As PdfPage In pdfDocumentProcessor.Document.Pages
                       angle = (angle + 90) Mod 360
                       page.Rotate = angle
                   Next page
                   pdfDocumentProcessor.SaveDocument("..\..\docs\Rotated.pdf")
               End Using
           End Sub
       End Class
   End Namespace
   

5. Run the project. After executing the code above, the pages are rotated and the new document is saved to the specified location.

1. Run Microsoft Visual Studio and create a new Console Application (.NET Core) project.

2. Install the DevExpress.Document.Processor NuGet package.

3. Paste the code below in the Main method of the Program.cs file (Main procedure of the Module1.vb file for Visual Basic).

   Program.cs

   using DevExpress.Pdf;
   
   namespace PdfPageRotationExample
   {
       class Program
       {
           static void Main(string[] args)
           {
               using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
               {
                   pdfDocumentProcessor.LoadDocument("..\\..\\docs\\TextRotate.pdf");
                   int angle = 0;
                   foreach (PdfPage page in pdfDocumentProcessor.Document.Pages) {
                       angle = (angle + 90) % 360;
                       page.Rotate = angle;
                   }
                   pdfDocumentProcessor.SaveDocument("..\\..\\docs\\Rotated.pdf");
               }
           }
       }
   }
   

   Program.vb

   Imports DevExpress.Pdf
   
   Namespace PdfPageRotationExample
   
       Friend Class Program
           Shared Sub Main(ByVal args() As String)
               Using pdfDocumentProcessor As New PdfDocumentProcessor()
                   pdfDocumentProcessor.LoadDocument("..\..\docs\TextRotate.pdf")
                   Dim angle As Integer = 0
                   For Each page As PdfPage In pdfDocumentProcessor.Document.Pages
                       angle = (angle + 90) Mod 360
                       page.Rotate = angle
                   Next page
                   pdfDocumentProcessor.SaveDocument("..\..\docs\Rotated.pdf")
               End Using
           End Sub
       End Class
   End Namespace
   

4. Run the project. After executing the code above, the pages are rotated and the new document is saved to the specified location.

1. Run Microsoft Visual Studio and create a new Console Application (.NET Core) project.

2. Install the DevExpress.WindowsDesktop.Document.Processor NuGet package.

3. Right-click the project in the Solution Explorer and select Edit Project File.

   

   Change the project’s SDK attribute to Microsoft.NET.Sdk.WindowsDesktop and set the UseWindowsForms option to true.

   Xml

   <Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
   
     <PropertyGroup>
       <OutputType>Exe</OutputType>
       <TargetFramework>netcoreapp3.0</TargetFramework>
       <UseWindowsForms>true</UseWindowsForms>
     </PropertyGroup>
   </Project>
   

4. Paste the code below in the Main method of the Program.cs file (Main procedure of the Module1.vb file for Visual Basic).

   Program.cs

   using DevExpress.Pdf;
   
   namespace PdfPageRotationExample
   {
       class Program
       {
           static void Main(string[] args)
           {
               using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
               {
                   pdfDocumentProcessor.LoadDocument("..\\..\\docs\\TextRotate.pdf");
                   int angle = 0;
                   foreach (PdfPage page in pdfDocumentProcessor.Document.Pages) {
                       angle = (angle + 90) % 360;
                       page.Rotate = angle;
                   }
                   pdfDocumentProcessor.SaveDocument("..\\..\\docs\\Rotated.pdf");
               }
           }
       }
   }
   

   Program.vb

   Imports DevExpress.Pdf
   
   Namespace PdfPageRotationExample
   
       Friend Class Program
           Shared Sub Main(ByVal args() As String)
               Using pdfDocumentProcessor As New PdfDocumentProcessor()
                   pdfDocumentProcessor.LoadDocument("..\..\docs\TextRotate.pdf")
                   Dim angle As Integer = 0
                   For Each page As PdfPage In pdfDocumentProcessor.Document.Pages
                       angle = (angle + 90) Mod 360
                       page.Rotate = angle
                   Next page
                   pdfDocumentProcessor.SaveDocument("..\..\docs\Rotated.pdf")
               End Using
           End Sub
       End Class
   End Namespace
   

5. Run the project. After executing the code above, the pages are rotated and the new document is saved to the specified location.