I have files in a SharePoint Drive and want to develop a full-text search. The following call in the Graph Explorer works, finding my files either by filename or content:
https://graph.microsoft.com/v1.0/drives/{my drive id}/root/search(q='my search word')
The same call from my Azure hosted ASP.NET app using the Microsoft.Graph-NuGet package allways returns an empty list:
await _client
.Drives[{my drive id}]
.Root
.Search({my search word})
.Request()
.GetAsync()
_client is an authenticated GraphServiceClient. For authentication, I receive a token through the Azure AD endpoint (app registered in the Azure Portal), not from the v2 Endpoint (app registered in the Application Registration Portal). To exclude this as a reason, I used the v2 Endpoint but there was no difference.
The application has the Files.ReadWrite.All permission scope. Receiving, saving and deleting files works fine. Only searching fails.
As a test, I gave my application all rights Graph Explorer has with no difference. I compared the URL the GraphServiceClient prepared but everything looked fine.
This question described the same problem two days later. In a comment the author stated, it started working yesterday without him changing anything. I tested it today with my same old Code. What can I say? It works now! Looks like it was a bug on Microsofts side?