C # implements the use of MongoDB self-increment columns

Create a collection to hold _id

Db.createcollection ("counters")

Add fields that require self-increment

{  "_id": "ProductID",  "Sequence_value": 0}

Then add the self-increment JS method in the MongoDB library Getnextsequencevalue

function (sequencename) {   var sequencedocument = db.counters.findAndModify (      {         query:{_id:sequencename},         Update: {$inc: {sequence_value:1}},         new:true      });   return sequencedocument.sequence_value;}

code calls in C #

  Model.id = Convert.ToInt32 (_dbs. Database.eval ("getnextsequencevalue (' ProductID ')"). Asbsonvalue);

After the execution, and then to look at the counters, is not self-increasing

C # implements the use of MongoDB self-increment columns