Update mongodb

Src/Asp.NetCore2/MongoDb.Ado.data/ExecuteNonQueryItems/NonFindHandler.cs

@@ -0,0 +1,18 @@
+using MongoDB.Bson;
+using MongoDB.Driver;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MongoDb.Ado.data 
+{
+    public class NonFindHandler : IMongoOperationHandler
+    {
+        public int Handle(IMongoCollection<BsonDocument> collection, string json)
+        {
+            var filter = string.IsNullOrWhiteSpace(json) ? FilterDefinition<BsonDocument>.Empty : BsonDocument.Parse(json);
+            var result = collection.Find(filter).FirstOrDefault();
+            return 0; // 查询不改变数据库
+        }
+    }
+}