从MongoDB返回整个集合

Question

using the official mongo / c# drivers - what is the best way of returning an entire collection, and what is the best way of storing the data? I've seen some examples of iterating over a collection and returning a particular value, like this:

var collection = db.getCollection("users").findAll();
foreach (var value in collection){
     value = collection["key"];
     ...
}

but what if I don't know the key names - and I just want to return the collection?

Answer 1

You dont need to know the key names when returning a collection.

 public static void ReadCollectionDataUsingBson(string collectionName, string databaseName)
    {
        MongoDatabase database = CreateDatabase(databaseName);

        MongoCollection<BsonDocument> collection = database.GetCollection<BsonDocument>(collectionName);
        foreach (BsonDocument document in collection.FindAll())
        {
            foreach (string name in document.Names)
            {
                BsonElement element = document.GetElement(name);
                Console.WriteLine("{0}: {1}", name, element.Value);
            }
            Console.WriteLine();
        }
    }

Note: CreateDatabase() function is user defined, so i have just shown you the required code over here.