Spire.Cloud.PDF provides the PdfImagesApi interface, allowing developers to handle images in PDF. This article shows you how to add an image to PDF and how to extract images from a particular page by using this API.

Example 1. Add an image to PDF

using System;
using System.IO;
using Spire.Cloud.Pdf.Sdk.Api;
using Spire.Cloud.Pdf.Sdk.Client;

namespace AddImage
{
    class Program
    {
        static String appId = "App ID";
        static String appKey = "App Key";
        static String baseUrl = "https://api.cloudxdocs.com";

        //Create a Configuration object based on App ID, App Key and base Url
        static Configuration pdfConfiguration = new Configuration(appId, appKey, baseUrl);

        //Create a PdfImagesApi object
        static PdfImagesApi pdfImagesApi = new PdfImagesApi(pdfConfiguration);
        static void Main(string[] args)
        {
            //Specify the source document name
            string name = "sample.pdf";

            //Specify the result document path
            string outPath = "output/AddImage.pdf";

            //Specify the index of the page to add image
            int pageNumber = 1;

            //Load the image file
            using (System.IO.Stream file = new FileStream("C:/Users/Administrator/Desktop/logo.png", FileMode.Open))
            {
                //Specify the x and y coordinate where the image will be added
                float x = 10;
                float y = 10;
           
                //Specify the width and height of image 
                float? width = null;
                float? height = null;

                //Specify the password, set to null if there is no password in the original document
                string password = null;

                //Specify the folder where the source document is stored
                string folder = "input";

                //Use the default storage, set to null
                string storage = null;

                //Call AddImage method to insert image to the spcified coodinate of the selected page
                pdfImagesApi.AddImage(name, outPath, pageNumber, file, x, y, width, height, folder, storage, password);
            }
        }
    }
}

Example 2. Extract images from a page

using System;
using Spire.Cloud.Pdf.Sdk.Api;
using Spire.Cloud.Pdf.Sdk.Client;

namespace ExtractImage
{
    class Program
    {
        static String appId = "App ID";
        static String appKey = "App Key";
        static String baseUrl = "https://api.cloudxdocs.com";

        //Create a Configuration object based on App ID, App Key and base Url
        static Configuration pdfConfiguration = new Configuration(appId, appKey, baseUrl);

        //Create a PdfImagesApi object
        static PdfImagesApi pdfImagesApi = new PdfImagesApi(pdfConfiguration);

        static void Main(string[] args)
        {
            //Specify the source document name
            string name = "Images.pdf";

            //Specify the output file path
            string outPath = "output/";

            //Specify the index of the page to extract image
            int pageNumber = 1;

            //Specify the password, set to null if there is no password in the original document
            string password = null;

            //Use the default storage, set to null
            string storage = null;

            //Specify the folder where the source document is stored
            string folder = "input";

            //Call ExtractImages to extract images from the specified page
            pdfImagesApi.ExtractImages(name, outPath, pageNumber, folder, storage, password);
        }
    }
}