Question

我有以下内容：

public class Address{
    public string Number { get; set; }
    public string Street { get; set; }
    public string Suburb { get; set; }
}

List<Address> MyAddressList = new List<Address>();

Address MyAddress = new Address();
myAddress.Number = "5"
myAddress.Street = "Smith St"
myAddress.Suburb = "Smithsville"
MyAddressList.Add(MyAddress);

Address MyAddress2 = new Address();
myAddress2.Number = "10"
myAddress2.Street = "John St"
myAddress2.Suburb = "Johnsville"
MyAddressList.Add(MyAddress2);

string [] StreetToFind = new string {"Smith St"};
string [] SuburbToFind = new string {"Smithsville"};
string [] secondSuburbToFind = new string {"Johnsville"};

我想搜索此列表并查找值的组合，并在找到组合时返回bool。

首先，我可以在Street Property中搜索单个值：

bool StreetIsFound = MyAddressList.Select(x => x.Street).Intersect(StreetToFind).Any();

和郊区一样：

bool SuburbIsFind = = MyAddressList.Select(x => x.Suburb).Intersect(SuburbToFind).Any();

但我希望能够在组合中搜索两者（bool StreetandSuburbFound）

因此，如果我搜索StreetToFind和SuburbToFind，StreetandSuburbFound将成立，但如果搜索StreetToFind和secondSuburbToFind则会出错。

Answer 1

您可以通过拨打Any来完成所有操作。喜欢这个

var isFound = MyAddressList.Any(x => StreetToFind.Contains(x.Street) && SuburbToFind.Contains(x.Suburb));

或查询语法

var isFound =
    (from x in MyAddressList
     where StreetToFind.Contains(x.Street)
        && SuburbToFind.Contains(x.Suburb)
     select x)
    .Any();

Answer 2

或p.s.w.g代码的方法链版本：

MyAddressList.Any(x => StreetToFind.Contains(x.Street) 
                       && SuburbToFind.Contains(x.Suburb))

（显然需要调整Contains等）

c＃ - 在列表中搜索组合

2 个答案: