如何使用LINQ从地图内的列表中选择？

Question

我正在尝试从列表中选择要存储在词典中的特定元素。

internal Dictionary<string, List<Teamkill>> teamkillCounter = new Dictionary<string, List<Teamkill>>();

class Teamkill
{
    public string killerName;
    public string killerSteamId;
    public TeamRole killerTeamRole;
    public string victimName;
    public string victimSteamId;
    public TeamRole victimTeamRole;
    public DamageType damageType;
}

// quotedArgs[1] is the killer name being searched for

// First attempt
List<Teamkill> teamkills = this.plugin.teamkillCounter.Select(x => x.Value.Select(y => y.killerName.Contains(quotedArgs[1])).Cast<List<Teamkill>>()).Cast<List<Teamkill>>().Single();

// Second attempt
List<Teamkill> teamkills = new List<Teamkill>();
teamkills = this.plugin.teamkillCounter.Values.SelectMany(x => x).ToList();
teamkills = teamkills.Where(y => y.killerName.Contains(quotedArgs[1])).ToList();

理想情况下，它应该返回与杀手的名字匹配的所有Teamkill的列表。

Answer 1

如果我了解您想要的结果，则可以只使用Values，SelectMany和Where。

var result = teamkillCounter.SelectMany(x => x.Value.Where(y => y.killerName.Contains("bobo")));

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Dictionary<TKey,TValue>.Values Property

  

获取一个集合，其中包含   字典。

Enumerable.SelectMany Method

  

将序列的每个元素投影到IEnumerable<T>并展平   产生的序列变成一个序列。