Problem mapping classes with .NET driver 2.11.0

Working with Data Drivers
4

Hi @funk_xie,

You don’t need to register the BSON representation for ObjectId. For example, you could have the following class mapping:

    public class MyClass 
    {
        [BsonRepresentation(BsonType.ObjectId)]
        public string Id { get; set; }
        public string Name {get; set;}
    }

When you perform an insert as below. The value of Id will be automatically filled with an ObjectId.

var document = new MyClass { Name = "Foo" };
collection.InsertOne(document);

You could also specify your own Id (with a valid ObjectId hex string format) as below. The string value will be serialised into ObjectId in the database.

var document2 = new MyClass {Id="5f488a68d1314f2be9ea5b7d", Name="Bar"}; 
collection.InsertOne(document2);

When you read the value of the Id field, that would automatically be mapped back to string, for example:

var result = collection.Find(new BsonDocument()).FirstOrDefault();
Console.WriteLine(result.Id);
// Outputs string "5f488a68d1314f2be9ea5b7d"

Regards,
Wan.

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