使用C＃MongoDB驱动程序尝试FindAll

Question

I'm attempting a "find all" query using the latest version of the C# MongoDB driver.

The code looks a bit like this

var xx = _context.NLMCDatabase.GetCollection<BsonDocument>("Requestables").Find<BsonDocument>(new BsonDocument());
var qq = xx.ToListAsync<BsonDocument>();
long yy = await xx.CountAsync();

The database connection is fine I use the same connection for inserting data. I have sent an empty query as

new BsonDocument()

The code executes but does not seem to return any results. When exploring with the debugger it reports

Answer 1

You are missing the await for the xx.ToListAsync<BsonDocument>(); which means the value of qq will just be a task.

Try either:

var xx = _context.NLMCDatabase.GetCollection<BsonDocument>("Requestables").Find<BsonDocument>(new BsonDocument());
var qq = await xx.ToListAsync<BsonDocument>();
long yy = await xx.CountAsync();

or

var xx = _context.NLMCDatabase.GetCollection<BsonDocument>("Requestables").Find<BsonDocument>(new BsonDocument());
var qq = xx.ToListAsync<BsonDocument>();
long yy = await xx.CountAsync();
var listOfResults = await qq;