将动态对象转换为IEnumerable Issue

Question

protected override IEnumerable<dynamic> GetData()
{
    var request = new RestRequest();
    var directoryResponse = client.ExecuteTaskAsync(request).Result;

    dynamic directory = JsonConvert.DeserializeObject<MyDTO>(directoryResponse.Content);

    cachedDirectory = directory;
}

return cachedDirectory;

Issue is on the line

cachedDirectory = directory;

Whenever it tries convert the dynamic object to an IEnumerable type.

Exception message:

Cannot implicitly convert type 'MyDTO' to 'System.Collections.Generic.IEnumerable<object>'. An explicit conversion exists (are you missing a cast?)

Answer 1

I have to make few assumption.

• I assume that your cachedDirectory object is type of IEnumerable. If this is the case then it is clear that it can not convert MyDTO object to IEnumerable at runtime and it throw exception.

Following code give you error. I assume that you need enumrable.

    public class NewTest
    {
        IEnumerable<dynamic> cachedDirectory;
        public IEnumerable<dynamic> GetData()
        {
            dynamic directory = JsonConvert.DeserializeObject<MyDTO>("{ 'Name' : 'Test'  }");
            cachedDirectory = directory;
            return cachedDirectory;            
        }
    }

    public class MyDTO
    {
        public string Name { get; set; }
    }

// This is how you call. (This code give error)

    NewTest test = new NewTest();
    IEnumerable<dynamic> result = test.GetData();

Answer : If above is the way you use then you can do something like this.

public class NewTest
{
    IEnumerable<dynamic> cachedDirectory;
    public IEnumerable<dynamic> GetData()
    {
         var request = new RestRequest();
        var directoryResponse = client.ExecuteTaskAsync(request).Result;
        dynamic directory = JsonConvert.DeserializeObject<IEumerable<MyDTO>>(directoryResponse.Content);            
        return directory;            
    }
}

public class MyDTO
{
    public string Name { get; set; }
}

// Now this will work.

    NewTest test = new NewTest();
    IEnumerable<dynamic> result = test.GetData();