我想获得同一个人玩过的其他数量的游戏。例如,lisa在游戏7中玩,这是另外一个游戏。 Tim和Josh都参加了第二场比赛,但也参加了其他三场比赛。有没有办法通过Igrouping比较组并查看值是否相同?
public List<Game> DummyDataSet()
{
dataSet.Add(new Game { GameNo = 1, FirstName = "Lisa" });
dataSet.Add(new Game { GameNo= 2, FirstName = "Tim" });
dataSet.Add(new Game { GameNo = 2, FirstName = "Josh" });
dataSet.Add(new Game { GameNo = 3, FirstName = "Susan" });
dataSet.Add(new Gamee { GameNo = 4, FirstName = "Tim" });
dataSet.Add(new Gamee { GameNo = 5, FirstName = "Tim" });
dataSet.Add(new Gamee { GameNo = 5, FirstName = "Josh" });
dataSet.Add(new Game { GameNo = 6, FirstName = "Josh" });
dataSet.Add(new Game { GameNo = 7, FirstName = "Lisa" });
return dataSet;
}
public void numOfOtherMissions()
{
List<Game> something;
something = DummyDataSet();
var grouped = something.ToLookup(x => x.GameNo, x => x.FirstName);
foreach (IGrouping<int, string> item in grouped)
{
Console.Write(item.Key);
Console.Write(": ");
var result = grouped.ToLookup(z => FirstName);
foreach (var value in item)
{
int games = 0;
if(result == item)
{
othergames++;
}
else
{
othergames = 0;
}
Console.Write(value + " " + othergames);
Console.WriteLine();
}
}
}
答案 0 :(得分:1)
您无法使用当前查找来获取所需的信息。您需要再次查询列表以获取每个人的游戏数量。这是一个例子:
public void numOfOtherMissions(List<Game> something)
{
var grouped = something.ToLookup(x => x.GameNo, x => x.FirstName);
//Create a dictionary that holds the number of games for each person
var gamesForPerson =
something
.GroupBy(x => x.FirstName)
.ToDictionary(x => x.Key, x => x.Count());
foreach (IGrouping<int, string> item in grouped)
{
Console.Write(item.Key);
Console.Write(": ");
foreach (var value in item)
{
//Get total number of games for this person and subtract 1
var othergames = gamesForPerson[value] - 1;
Console.Write(value + " " + othergames);
Console.WriteLine();
}
}
}