How to write following MongoDB query in C# Driver?
- by user3043457
I wrote the exact query I need in Mongo console, but I'm having trouble rewriting it in C# driver.
Here's a sample of the document, it's simple dictionary:
{
"_id" : ObjectId("539716bc101c588f941e2c27"),
"_t" : "DictionaryDocument",
"CsvSeparator" : ",",
"SelectedAccounts" : "0",
...
}
Here's the query:
db.settings.find({"SelectedAccounts" :{$exists:true}},{"SelectedAccounts":1, "_id":0} )
Now, I got the first part, Find with exists working, but how to write the second parameter in C# driver? I'd just like a single string as a result, not entire document.
Here's C# code I got so far:
_collection.FindOneAs(typeof(DictionaryDocument), Query.Exists(key));
key in this case is "SelectedAccounts". I'd like the query to filter and return only the data I need, I don't want to return all the results and search on the C# side.
EDIT: I wouldn't mind if _id was passed back, but I don't need it. So only this part would work if it could be converted in C#:
db.settings.find({"SelectedAccounts" :{$exists:true}},{"SelectedAccounts":1} )
