Save PDF file to Google Drive

13 Dec 20234 minutes to read

To save a PDF file to Google Drive, you can follow the steps below

Step 1: Set up Google Drive API

You must set up a project in the Google Developers Console and enable the Google Drive API. Obtain the necessary credentials to access the API. For more information, view the official link.

Step 2: Create a simple console application

Step 3: Install the Syncfusion.Pdf.Net.Core and Google.Apis.Drive.v3 NuGet packages as a reference to your project from the NuGet.org.

Step 4: Include the following namespaces in the Program.cs file.

C# [Cross-platform]

using Syncfusion.Pdf;
    using Syncfusion.Pdf.Graphics;
    using Google.Apis.Auth.OAuth2;
    using Google.Apis.Drive.v3;
    using Google.Apis.Services;
    using Google.Apis.Util.Store;
    using File = Google.Apis.Drive.v3.Data.File;
    using Syncfusion.Drawing;

Step 5: Add the below code example to create a simple PDF and save in google drive.

C# [Cross-platform]

// Create a new PDF document
    PdfDocument document = new PdfDocument();
    // Add a new page to the document
    PdfPage page = document.Pages.Add();
    // Get graphics object for the page
    PdfGraphics graphics = page.Graphics;
    // Draw text on the page
    graphics.DrawString("Hello, World!", new PdfStandardFont(PdfFontFamily.Helvetica, 12), PdfBrushes.Black, new PointF(10, 10));
    // Create a memory stream to save the PDF document
    MemoryStream stream = new MemoryStream();
    // Save the document to the memory stream
    document.Save(stream);
    // Close the document
    document.Close(true);

    // Load Google Drive API credentials from a file
    UserCredential credential;
    string[] Scopes = { DriveService.Scope.Drive };
    string ApplicationName = "YourAppName";

    using (var stream1 = new FileStream("credentials.json", FileMode.Open, FileAccess.Read))//Replace with your actual credentials.json
    {
        string credPath = "token.json";
        // Authorize the Google Drive API access
        credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
            GoogleClientSecrets.Load(stream1).Secrets,
            Scopes,
            "user",
            CancellationToken.None,
            new FileDataStore(credPath, true)).Result;
    }
    // Create a new instance of Google Drive service
    var service = new DriveService(new BaseClientService.Initializer()
    {
        HttpClientInitializer = credential,
        ApplicationName = ApplicationName,
    });


    // Create metadata for the file to be uploaded
    var fileMetadata = new File()
    {
        Name = "Sample1.pdf", // Name of the file in Google Drive
        MimeType = "application/pdf",
    };
    FilesResource.CreateMediaUpload request;

    // Create a memory stream from the PDF document
    using (var fs = new MemoryStream(stream.ToArray()))
    {
        // Create an upload request for Google Drive
        request = service.Files.Create(fileMetadata, fs, "application/pdf");
        // Upload the file
        request.Upload();
    }

You can download a complete working sample from GitHub.