How to rotate a range of pages in a PDF in C# .NET Framework

So we need to rotate a specific subset of pages in a PDF document with C#. No problem. This is going to be much easier than you think, I guarantee it.

We’re going to get this started with installation of our API client. This just means running this command in your Package Manager console:

Install-Package Cloudmersive.APIClient.NET.DocumentAndDataConvert -Version 2.2.0

Now that our API can be accessed, our next step is to call EditPdfRotatePageRange and specify our details.

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Api;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Client;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Model;
namespace Example
{
public class EditPdfRotatePageRangeExample
{
public void main()
{
// Configure API key authorization: Apikey
Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
// Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
// Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");
var apiInstance = new EditPdfApi();
var inputFile = new System.IO.Stream(); // System.IO.Stream | Input file to perform the operation on.
var rotationAngle = 56;  // int? | The angle to rotate the page in degrees, must be a multiple of 90 degrees, e.g. 90, 180, 270, or -90, -180, -270, etc.
var pageStart = 56;  // int? | Page number (1 based) to start rotating pages from (inclusive).
var pageEnd = 56;  // int? | Page number (1 based) to stop rotating pages from (inclusive).
try
{
// Rotate a range, subset of pages in a PDF document
byte[] result = apiInstance.EditPdfRotatePageRange(inputFile, rotationAngle, pageStart, pageEnd);
Debug.WriteLine(result);
}
catch (Exception e)
{
Debug.Print("Exception when calling EditPdfApi.EditPdfRotatePageRange: " + e.Message );
}
}
}
}

Well, that’s it. So easy. We have a whole bunch more APIs that cover all kinds of similar functionality. Name a tricky task, and we’ve probably got an API for that.