Question

var database = new MongoClient("mongodb://192.168.3.122").GetDatabase("TestDb");
var collection = database.GetCollection<Post>("Post");
var res = collection.AsQueryable().Where(x => x.Id.In(new List<int> { 1, 2, 3 })).Select(y => y).ToList(); //error here
foreach (var post in res)
{
    Console.WriteLine(post.Id + " " + post.Code);
}

我想要与此SQL查询类似的结果：

Select * From Post Where Id In(1, 2, 3)

Answer 1

试试这个

var Ids = new int[] { 1, 2, 3};
var res = collection.AsQueryable().Where(x => Ids.Contains(x.Id)).Select(y => y).ToList();

Answer 2

我认为你可以像这样使用In过滤器：

var filter = Builders<Post>.Filter.In(f=> f.Id, new []{ 1, 2, 3 });

获得预期结果：

// As an Async way
var res = collection.Find(filter).ToListAsync().Result;

// As a Sync way
var res = collection.Find(filter).ToList();

MongoDb CSharp驱动程序：选择setX中的行（val1，val2，val3）

2 个答案: