Save document to One Drive

9 Jan 20248 minutes to read

To save a document to One Drive, you can follow the steps below

Step 1: Create the Microsoft graph API.

Need to create a Microsoft Graph API application and obtain the necessary credentials, namely the application ID and tenant ID. Follow the steps provided in the link to create the application and obtain the required IDs.

Step 2: Create a Simple Document Editor sample in angular

Follow the instructions provided in this link to create a simple Document Editor sample in angular. This will give you a basic setup of the Document Editor component.

Step 3: Modify the DocumentEditorController.cs File in the Web Service Project

• Create a web service project in .NET Core 3.0 or above. You can refer to this link for instructions on how to create a web service project.

• Open the DocumentEditorController.cs file in your web service project.

• Import the required namespaces at the top of the file:

using System.IO;
using Microsoft.Graph;
using Microsoft.Identity.Client;
using Helpers;

• Add the following private fields and constructor parameters to the DocumentEditorController class, In the constructor, assign the values from the configuration to the corresponding fields

private IConfiguration _configuration;
public readonly string folderName;
public readonly string applicationId;
public readonly string tenantId;

public DocumentEditorController(IWebHostEnvironment hostingEnvironment, IMemoryCache cache, IConfiguration configuration)
{
  _hostingEnvironment = hostingEnvironment;
  _cache = cache;
  _configuration = configuration;
  folderName = _configuration.GetValue<string>("FolderName");
  tenantId = _configuration.GetValue<string>("TenantId");
  applicationId = _configuration.GetValue<string>("ApplicationId");
}

• Create the SaveToOneDrive() method to save the downloaded document to One Drive bucket

[AcceptVerbs("Post")]
[HttpPost]
[EnableCors("AllowAllOrigins")]
[Route("SaveToOneDrive")]
//Post action for downloading the document

public void SaveToOneDrive(IFormCollection data)
{

  if (data.Files.Count == 0)
    return;

  IFormFile file = data.Files[0];
  string documentName = this.GetValue(data, "documentName");
  string result = Path.GetFileNameWithoutExtension(documentName);
  string fileName = result + "_downloaded.docx";

  Stream stream = new MemoryStream();
  file.CopyTo(stream);
  

  var config = LoadAppSettings();
  var client = GetAuthenticatedGraphClient(config);

  var request = client.Me.Drive.Root.Children.Request();
  string folderId = string.Empty;
  var results = await request.GetAsync();

  var folder = results.FirstOrDefault(f => f.Name == folderName && f.Folder != null);
  if (folder != null)
  {
    // Save the matching folderId
    folderId = folder.Id;
  }

  var uploadedFile = client.Me.Drive.Items[folderId]
                     .ItemWithPath(fileName)
                     .Content
                     .Request()
                     .PutAsync<DriveItem>(stream)
                     .Result;

}

private string GetValue(IFormCollection data, string key)
{
    if (data.ContainsKey(key))
    {
        string[] values = data[key];
        if (values.Length > 0)
        {
            return values[0];
        }
    }
    return "";
}

• Open the appsettings.json file in your web service project, Add the following lines below the existing "AllowedHosts" configuration

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "TenantId": "Your_Tenant_ID",
  "applApplicationIdicationId": "Your_Application_ID",
  "FolderName": "Your_Folder_Name_To_Access_The_Files_In_Onedrive"
}

Replace Your_Tenent_ID, Your_Application_ID, and Your_Folder_Name_To_Access_The_Files_In_Onedrive with your actual tenant ID, application ID, and folder name.

Step 4: Modify the index File in the Document Editor sample

In the client-side, to export the document into blob the document using saveAsBlob and sent to server-side for saving in One Drive.

import { Component, OnInit, ViewChild } from '@angular/core';
import {
  DocumentEditorContainerComponent,
  ToolbarService,
} from '@syncfusion/ej2-angular-documenteditor';
@Component({
      selector: 'app-root',
      // specifies the template string for the DocumentEditorContainer component
      template: `<button ejs-button (click)="save()" >Save to One Drive</button><ejs-documenteditorcontainer #documenteditor_default serviceUrl="http://localhost:62870/api/documenteditor/" height="600px" style="display:block" (created)="onCreate()" [enableToolbar]=true> </ejs-documenteditorcontainer>`,
      providers: [ToolbarService],
})
export class AppComponent implements OnInit {
  @ViewChild('documenteditor_default')
  public container: DocumentEditorContainerComponent;
  ngOnInit(): void {}

   public save(): void {
        //Export the document as Blob object.
        this.container.documentEditor.saveAsBlob('Docx').then((exportedDocument: Blob) => {
          //Now, save the document where ever you want.
          let formData: FormData = new FormData();
          formData.append('documentName', this.container.documentEditor.documentName);
          formData.append('file', exportedDocument);
          /* tslint:disable */
          let req = new XMLHttpRequest();
          // Replace your running Url here
          req.open(
              'POST',
              'http://localhost:62870/api/documenteditor/SaveToOneDrive',
              true
          );
          req.onreadystatechange = () => {
              if (req.readyState === 4) {
                  if (req.status === 200 || req.status === 304) {
                      console.log('Saved sucessfully');
                  }
              }
          };
          req.send(formData);
        });
    }
}

The following NuGet packages are required to use the previous code example

• Microsoft.Identity.Client
• Microsoft.Graph
• Microsoft.Extensions.Configuration
• Microsoft.Extensions.Configuration.FileExtensions
• Microsoft.Extensions.Configuration.Json

You can install these packages using the NuGet Package Manager in Visual Studio or Visual Studio Code.