MongoDB .NET Driver - Aliasing fields in the projection

Question

How to add alias in .NET 8 Blazor C# to change the field name?

var project = Builders<BsonDocument>.Projection.Include("NameField").Include("_id")

How can I change the name NameField to just Name?

var client = new MongoClient();
var db = client.GetDatabase("DB");
var coll = db.GetCollection<BsonDocument>("CollectionName");

var filter = Builders<BsonDocument>.Filter.Eq("_id", id);
var query = coll.Find(filter);

How can I use the alias in this code?

Any guidance or suggestions would be greatly appreciated.

Answer 1

You can assign the projection with the BsonDocument instance. It works the same as writing the MongoDB query.

ProjectionDefinition<BsonDocument> projection = new BsonDocument
{
    { "_id", 1 },
    { "Name", "$NameField" }
};

var filter = Builders<BsonDocument>.Filter.Eq("_id", id);
var query = coll.Find(filter)
    .Project(projection);