Can someone give me an example of the use of the RunCommand method that takes a string argument only (called CommandName) available in the MongoDB .NET driver? I know there is an overloaded RunCommand method that takes an object reference (I think a CommandDocument object) as an argument, but I'd rather not use that one.
I'm having trouble getting the syntax right for CommandName. Thanks in advance!
If you are using some recent version of the official C# driver, the "real" string based version you are referring to (CommandResult RunCommand(string commandName)) is only part of the legacy driver component (check the namespace). I would hence not recommend using it.
The "official" interface currently looks like this:
TResult RunCommand<TResult>(Command<TResult> command, /* and some additional optional parameters */)
And since the C# driver heavily relies on implicit type conversions, there also is one from a string (and a BsonDocument) to the corresponding sub types of Command<TResult> (JsonCommand<TResult> and BsonDocumentCommand<TResult>). So you can effectively pass a string to the above new RunCommand() method, too.
You can therefore write either one of the following lines both of which do the exact same thing:
RunCommand<BsonDocument>("{count: \"collection_name\"}")
RunCommand<BsonDocument>(new BsonDocument("count", "collection_name"))
