我相信您正在寻找In
FilterDefinition,这将使您的构建器看起来像这样;
return Builders<MyObject>.Filter.ElemMatch(
o => o.arrayProperty,
Builders<ArrayProperty>.Filter.In(y => y.string1, listToFind));
这构建了这个查询
db.MyObject.find({ "arrayProperty" : { "$elemMatch" : { "string1" : { "$in" : ["a", "b", "aString"] } } } })
为了能够使用正则表达式,您必须构建一个不同的查询(我不喝咖啡,所以这没有任何保证)
var listToFind = new List<string> { "a", "b", "astring" };
var regexList = listToFind.Select(x => new BsonRegularExpression(x, "i"));
var filterList = new List<FilterDefinition<MyObject>>();
foreach (var bsonRegularExpression in regexList)
{
FilterDefinition<MyObject> fil = Builders<MyObject>.Filter.ElemMatch(o => o.arrayProperty, Builders<ArrayProperty>.Filter.Regex(
x => x.string1,
bsonRegularExpression));
filterList.Add(fil);
}
var orFilter = Builders<MyObject>.Filter.Or(filterList);
var result = collection.Find(orFilter).ToList();
它构建了以下查询
db.MyObject.find({ "$or" : [{ "arrayProperty" : { "$elemMatch" : { "string1" : /a/i } } }, { "arrayProperty" : { "$elemMatch" : { "string1" : /b/i } } }, { "arrayProperty" : { "$elemMatch" : { "string1" : /astring/i } } }] })