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Visual Studio Code – Connect to OneDrive using Microsoft Graph and C# not working

I was trying to create a very simple app to connect to my OneDrive and receive a list of the various files that I have hosted on OneDrive.

This is the code:

string clientId = "My client Id";
string clientSecret = "The secret id value";
string tenantId = "My tennant id";
      
var clientSecretCredential = new ClientSecretCredential(tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(clientSecretCredential);

var driveItems = await graphClient.Me.Drive.Root.Children.Request().GetAsync();

// Display the names of all items in the list
foreach (var item in driveItems)
{
    Console.WriteLine(item.Name);
}

The problem is that apparently graphClient.Me.Drive does not contain a Root definition (at least that’s what Visual Studio tells me).

I am using Microsoft.Graph v5.11 and Azure.Identity v1.9

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2

Answers


  1. 0

    One possible reason for this issue is a version mismatch between the Microsoft.Graph library and the Microsoft.Graph.Core library. In some versions, the property Root may not be directly accessible. Instead, you can try using the DriveItemRequestBuilder to retrieve the root drive item explicitly. Here’s an updated version of your code:

    string clientId = "My client Id";
string clientSecret = "The secret id value";
string tenantId = "My tenant id";

var clientSecretCredential = new ClientSecretCredential(tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(clientSecretCredential);

var driveItems = await graphClient.Me.Drive.Root.Children.Request().GetAsync();

foreach (var item in driveItems.CurrentPage)
{
    Console.WriteLine(item.Name);
}

    In this version, driveItems is retrieved using the Children property of the Root drive item. The CurrentPage property is used to iterate over the results and display the names of the items.

    Make sure you have the latest versions of both the Microsoft.Graph and Azure.Identity packages installed. You can check for updates using NuGet Package Manager or by running the following command in the Package Manager Console:

    Update-Package Microsoft.Graph Azure.Identity

    If the issue persists, you may want to consider checking the documentation or sample code provided by Microsoft for connecting to OneDrive using the Microsoft Graph API with the specific version of the libraries you are using.

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  2. 0

    You are now using Microsoft.Graph v5.11 which is different from V4.x and in V5 there’s no .Request().

    In the meantime, you are using client credential flow new ClientSecretCredential, so you can’t use .Me but have to use .Users["your_user_id"]. Because you don’t sign in first, so you have to give a user id manually. By the way, since you are using client credential flow, you have to set the scope as var scopes = new[] { "https://graph.microsoft.com/.default" };. This requires you to consent application type of api permission:

    enter image description here
    enter image description here

    Then you code based on V5.11 should be like:

    var scopes = new[] { "https://graph.microsoft.com/.default" };
var tenantId = "tenantId ";
var clientId = "clientId ";
var clientSecret = "clientSecret";
var clientSecretCredential = new ClientSecretCredential(
                            tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(clientSecretCredential, scopes);
var userDriveId = await graphClient.Users["yourUserId"].Drive.GetAsync();
var driveItems = await graphClient.Drives["userDriveId"].Items["Root"].Children.GetAsync();

    Related link: https://github.com/microsoftgraph/msgraph-sdk-dotnet/blob/feature/5.0/docs/upgrade-to-v5.md#drive-item-paths

    enter image description here

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