Question

如何使用LINQ计算每场比赛中一组中每个团队的进球差

这是我到目前为止所得到的，这只是给定目标的总和，没有实现。

GoalDifference =
    context.Games
        .Where(u => u.HomeTeam == t.TeamId)
        .Sum(t1 => t1.HomeGoals) +
    context.Games
        .Where(u => u.AwayTeam == t.TeamId)
        .Sum(t1 => t1.AwayGoals);

Answer 1

您需要有两个不同的ID，一个是主队，另一个是客队。然后

GoalDifference =
    context.Games
        .Where(u => u.HomeTeam == homeTeamId && u.AwayTeam == awayTeamId )
        .Sum(t1 => Math.Abs(t1.HomeGoals - t1.AwayGoals))

或者您都需要同时拥有MatchId，然后

 GoalDifference =
    context.Games
        .Where(u => u.MatchId == matchId )
        .Sum(t1 => Math.Abs(t1.HomeGoals - t1.AwayGoals))

Answer 2

我想说goal difference是您想要的：

GoalDifference =
//Home goal difference
context.Games
    .Where(u => u.HomeTeam == t.TeamId)
    .Sum(g1 => g1.HomeGoals - g1.AwayGoals) +
//Away goal difference 
context.Games
    .Where(u => u.AwayTeam == t.TeamId)
    .Sum(g1 => g1.AwayGoals- g1.HomeGoals);

请注意，您选择的不是sum内的球队，所以g1比t1更好的名字

计算足球比赛LINQ中的进球差

2 个答案: