Web API addCustomer service faced error when connecting Azure Cosmos DB

Ying Kit Li 1

System.InvalidOperationException: Unable to resolve service for type 'Microsoft.Azure.Cosmos.CosmosClient' while attempting to activate 'CosmosWebAPI.Controllers.CosmosDbService'.

I got the above exceptions when running the below api service in local swagger site:

[Route("/AddCustomer")]
HttpPost]
public async Task AddAsync(Customer item) {
await _container.CreateItemAsync(item, new PartitionKey(item.Id));
}

Please help.

AgaveJoe 26,141 Reputation points

2021-11-14T13:37:10.52+00:00

The error is telling you the dependency injection framework was unable to create a CosmosWebAPI.Controllers.CosmosDbService. Your startup configuration might be missing a service registration, the controller DI pattern could be incorrect, or the _container type might have a design bug.

The community cannot provide an accurate solution because we cannot see your code. However, you should be able to tack down the problem knowing this is a dependency injection configuration bug.