如何在MongoDB中查询类似的问题c＃

Question

在MongoDB中，如果我想做一个LIKE语句，我会这样做：

 db.users.find({"name": /m/})

它很棒!!我如何在c＃中完成？

Builders<BsonDocument>.Filter.Eq("city", "/M/"); 

不退货！

Answer 1

将 Filter Definition Builder 与正则表达式过滤器 Regex() 一起使用，如下所示：

var search = "M";
var builder = Builders<BsonDocument>.Filter;
var filter = builder.Regex("city", search);

Answer 2

//Use Regex,
var search = "M";
var builder = Builders<BsonDocument>.Filter;
var filter = builder.Regex("city", "^" + search + ".*"); 
// ^ - For Starts with
// . - any character
// * - for any number of previous "."