Deciphering ODataError

Question

Hello:

I am using C# to download a user's Todo tasks. I have delegated permission from the user. The code is:

            if (_userClient == null)
            {
                throw new NullReferenceException("Graph has not been initialized for user authorization");
            }

            TodoTaskCollectionResponse result = new TodoTaskCollectionResponse();

            try
			{            
                result = await _userClient.Me.Todo.Lists[listID].Tasks.GetAsync();
            }

            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

I must be doing something right, because this works about two-thirds of the time, but the other third I get an OData Error. The occurrence appears to be random. The error message is attached. Is there any way of telling from the error message what went wrong? If not, can you suggest an approach to debugging this?

Thanks for any advice you can give me.

Paul

Answer 1

Hi @Paul Smith

Make sure you are using Graph .NET SDK version 5.0 or above.

Also, your error is not necessarily a service exception, it could be specific instances of ODataError exceptions thrown by the SDK that rely on metadata provided by the API to return valuable details, so try to catch the ODataError exception.

try
{
    result = await graphClient.Me.Todo.Lists["{list id}"].Tasks.GetAsync();   
}

catch (ODataError odataError)
{
    Console.WriteLine(odataError.Error.Code);
    Console.WriteLine(odataError.Error.Message);    
}

Hope this helps.

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Answer 2

I thought I uploaded the error message. Trying again . . ODataError.png