Can I do a text query with the mongodb c# driver

Question

Is there a way to submit a query that is expressed in the shell query syntax to the mongo c# driver

For example Something like

Coll.find { \"myrecs\"         


        

Answer 1

There is no exact same functionality you want.

But you can create BsonDocument from json for query:

var jsonQuery = "{ x : 3, y : 'abc' }";
BsonDocument doc = MongoDB.Bson.Serialization
                   .BsonSerializer.Deserialize(jsonQuery);

And after that you can create query from BsonDocument:

var query = new QueryComplete(doc); // or probably Query.Wrap(doc);

The same you can do for the sort expression:

var jsonOrder = "{ x : 1 }";
BsonDocument orderDoc = BsonSerializer.Deserialize(jsonQuery);

var sortExpr = new SortByWrapper(orderDoc);

Also you can create extension method for the MongoCollection like this:

public static List GetItems(this MongoCollection collection, string queryString, string orderString) where T : class 
{
    var queryDoc = BsonSerializer.Deserialize(queryString);
    var orderDoc = BsonSerializer.Deserialize(orderString);

    //as of version 1.8 you should use MongoDB.Driver.QueryDocument instead (thanks to @Erik Hunter)
    var query = new QueryComplete(queryDoc);
    var order = new SortByWrapper(orderDoc);

    var cursor = collection.FindAs(query);
    cursor.SetSortOrder(order);

    return cursor.ToList();
}

I didn't test the code above. Will do it later if need.

Update:

Just tested the code above, it's working!

You can use it like this:

var server = MongoServer.Create("mongodb://localhost:27020");
var collection= server.GetDatabase("examples").GetCollection("SO");

var items = collection.GetItems("{ x : 3, y : 'abc' }", "{ x : 1 }");