问题
IMongoDatabase
does not support db.GetStats();
which is deprecated in new version.
I want to try alternate approach to get database stats. I use the following code to run command as we can get the stats from shell:
var client = new MongoClient("mongodb://localhost:27017/analytics");
var db = client.GetDatabase("analytics");
var stats = db.RunCommand<BsonDocument>("db.stats()");
var collectionNames = db.RunCommand<BsonDocument>
("db.getCollectionNames()");
I am getting following error here:
JSON reader was expecting a value but found 'db'.
Need help to execute the command on Mongo database using ژ# driver, like:
db.stats()
db.getCollectionNames()
回答1:
You can use RunCommand
method to get db.stats()
results like this:
var command = new CommandDocument {{ "dbStats", 1}, {"scale", 1}};
var result = db.RunCommand<BsonDocument>(command);
Result will be like this:
{
"db" : "Test",
"collections" : 7,
"objects" : 32,
"avgObjSize" : 94.0,
"dataSize" : 3008,
"storageSize" : 57344,
"numExtents" : 7,
"indexes" : 5,
"indexSize" : 40880,
"fileSize" : 67108864,
"nsSizeMB" : 16,
"dataFileVersion" : {
"major" : 4,
"minor" : 5
},
"extentFreeList" : {
"num" : 0,
"totalSize" : 0
},
"ok" : 1.0
}
And for db.getCollectionNames()
; a way is to use this command:
var command = new CommandDocument { { "listCollections", 1 }, { "scale", 1 } };
var result = db.RunCommand<BsonDocument>(command);
// and to clear extra details
var colNames = result["cursor"]["firstBatch"].AsBsonArray.Values.Select(c => c["name"]);
回答2:
Both upper answers did not work for me, but this did:
var command = new BsonDocument { { "dbstats", 1 } };
var result = db.RunCommand<BsonDocument>(command);
Debug.WriteLine(result.ToJson());
回答3:
You can get all collection names within a db by running following code: x contains the collection names.
String connectionString = "mongodb://your_address_here";
var client = new MongoClient(connectionString);
var database = client.GetDatabase("db_name_from_which_you_need_collections");
var cnames = database.ListCollections();
var allNames = cnames.ToList();
foreach(var x in allNames)
{
Console.WriteLine(x.ToString());
}
You can further get the standalone name by selecting x.Values.FirstOrDefault().ToString();
来源:https://stackoverflow.com/questions/40338948/c-sharp-mongo-driver-imongodatabase-runcommand-to-get-database-stats