Planner CheckList .Net SDK error - Value cannot be null. Parameter name: qualifiedName

Question

Hi,

I am having an error when using the Microsoft Graph. I am using the .NET SDK version 5.19.0.

I am using the Graph with the application permissions: Task.ReadAll, Task.ReadWriteAll

I am trying to create or update a PlannerDetails item which is a ChecklistItem using the code below:

public async Task<PlannerTask> InsertTarefa(string bucketId, string idPlanner, Dictionary<string, string> conteudoTask)
        {

            GraphServiceClient graphClient = CriarGraphClient(await gah.ObterTokenGraphAsync());

            var requestBody = new PlannerTask
            {
                PlanId = idPlanner,
                BucketId = bucketId,
                Title = conteudoTask["titulo"], 
                DueDateTime = DateTime.Parse(conteudoTask["dataFim"]),
                StartDateTime = DateTime.UtcNow,
                Details = new PlannerTaskDetails
                {
                    Description = conteudoTask["descricao"],
                    
                    Checklist = new PlannerChecklistItems()
                    {
                        AdditionalData = new Dictionary<string, object>
                        {
                            {
                                "95e27074-6c4a-447a-aa24-9d718a0b86fa", new
                                {
                                    OdataType = "microsoft.graph.plannerChecklistItem",
                                    Title = "Update task details",
                                    IsChecked = true
                                }
                            }
                        }
                    }
                }
            };
            try
            {
                return await graphClient.Planner.Tasks.PostAsync(requestBody);
            }
            catch (ODataError error)
            {
                Console.WriteLine(error.Error.Message);
                throw new Exception(error.Error.Message);
            }

        }

I used the example on the Learn website to create my request:

https://learn.microsoft.com/pt-br/graph/api/plannertaskdetails-update?view=graph-rest-1.0&tabs=csharp

I always get the following error:

"The request is invalid:\r\nValue cannot be null.\r\nParameter name: qualifiedName"

I have tried to search for information on these issues and the most I could find was addressed in this issue:

https://learn.microsoft.com/en-us/answers/questions/1192857/planner-task-assigned-to-user-using-graph-api

In the above case, the parameter has a corresponding class. The checklist parameter does not.

Answer 1

Hello Guilherme Marciano Gonçalves,

Thanks for reaching out. For SDK related questions please post them on the respective Graph SDK Github Forum.

Are you able to reproduce the issue with Graph Explorer or Postman applications.

Thanks.