MongoDB's connection to C # and curd notation

Connection database: Reference address: https://blog.oz-code.com/how-to-mongodb-in-c-part-2/

        //Empty ctor would get you a//client with a default localhost and port #27017Mongoclient m =Newmongoclient (); //----------------------------------------------------------------------        //Using a connection-stringMongoclient M1 =NewMongoclient ("mongodb://localhost:27017"); //----------------------------------------------------------------------        //Using mongoclientsettingsMongoclient client =NewMongoclient (Newmongoclientsettings {Server=NewMongoserveraddress ("localhost",27018),                 //Giving 3 seconds for a MongoDB server to is up before we throwServerselectiontimeout = Timespan.fromseconds (3)         }); //----------------------------------------------------------------------        //Using MongourlMongoclient client1 =Newmongoclient (Mongourl.create ("mongodb://localhost:27017")); }

Curd:

Mongoclient mongoclient =NewMongoclient (configuration["Databaseconnection:0:host"]); varDbAdmin = Mongoclient.getdatabase ("Shoppingmall"); varBuyercollection = dbadmin.getcollection<buyer> ("Shoppingmall.buyer"); //New                ////var a= buyercollection.insertoneasync (new Buyer {buyername= "admin", Buyerage=23, buyeraddress= "No. No. 067 Tianfu Avenue, Jianghan City", buyersex= ' 0 ', buyeridcard= "12355544884474", buyerheadportrait= "~/images/admin.jpg", buyeraccountnumber= "Admin1"}) ;                //Enquiry//LINQ notation//var sql = from BB in buyercollection.asqueryable ()//Select BB; //sql= SQL.                Where (t = t.buyerage >= 22); //var retlist = sql.                ToList (); //EF notation//var ret = buyercollection.asqueryable (). GroupBy (t=>new {t.buyerage}).                Where (t=>t.key.buyerage>=22); //var b = ret. ToList ();                varFilterbuilder = builders<buyer>.                Filter; varFilter = FILTERBUILDER.GT ("Buyerage",Ten) & Filterbuilder.lt ("counter", -) & Filterbuilder.lt ("counter", -);//Multiple conditions//var filter = Builders<buyer>. FILTER.GT ("Buyerage", 1);//a condition                varDocument =awaitBuyercollection.findasync (filter); varres =document.                ToList (); //Update                varUpdatefilter = FILTERBUILDER.GT ("Buyerage", -) & Filterbuilder.lt ("Buyerage", -);//Multiple conditions                varUpdated = Builders<buyer>. Update.set ("Buyername","John Doe"); varresult =Buyercollection.updatemanyasync (Updatefilter, updated).                Result; //Delete                varDelfilter = FILTERBUILDER.GT ("Buyerage", -) & Filterbuilder.lt ("Buyerage", -);//Multiple conditions                varResut = Buyercollection.deletemanyasync (delfilter). Result;

which

configuration["Databaseconnection:0:host") belongs to. Netcore connection string notation. The specific implementation is as follows:

Appsettings.json:

" databaseconnection " : [    {      "host""mongodb://localhost:27017"     }  ]

Read method:

         Public iconfigurationroot configuration;          Public Basecontroller ()        {            // read appsettings configuration            var New Configurationbuilder ()        . Setbasepath (Directory.GetCurrentDirectory ())        . Addjsonfile ("appsettings.json");             = Builder. Build ();        }

MongoDB's connection to C # and curd notation