关于.NET中的内存泄漏，使用不在Func参数列表中的对象的Func回调

Question

下面有一个回调函数，它接受name的一个参数。我还有一些来自调用父函数的其他函数。参数otherGame、_venueLocationsManager等是否会导致任何类型的内存泄漏或性能问题，或者这是有效的编程设置？

private IEnumerable<ValidateScheduleResult> GetMinimumOverlappingPoolGames(EventScheduleGameLayout gridItem, EventScheduleGameLayout otherGame, EventScheduleTeamLayout otherTeam, int minimumTimeBetweenGames, ValidationScheduleSettingsModel scheduleSettings)
{
Func<string, ValidateScheduleResult> callback = (name) =>
{
return FillGameInformation(new ValidateMinimumTimeBetweenGamesResult(name, otherGame.GetDate(), otherGame.GetTime(), _venueLocationsManager.GetVenueLocationName(otherGame.VenueCourtId), minimumTimeBetweenGames, scheduleSettings.ContestType), gridItem, ValidateItemResult.StatusType.Warning);
};
return GetOverlappingPoolGames(gridItem, otherTeam, callback);
}

回调自

private IEnumerable<ValidateScheduleResult> GetOverlappingPoolGames(EventScheduleGameLayout gridItem, EventScheduleTeamLayout otherTeam, Func<string, ValidateScheduleResult> callback)
{
var validationScheduleResults = new List<ValidateScheduleResult>();
Action<string> nameCallback = (name) =>
{
validationScheduleResults.Add(callback(name));
};
_eventScheduleValidatorsService.PoolGamesValidator.IsPoolGamesRestricted(gridItem.Matchup.AwayTeam, otherTeam, nameCallback);
_eventScheduleValidatorsService.PoolGamesValidator.IsPoolGamesRestricted(gridItem.Matchup.HomeTeam, otherTeam, nameCallback);
if (gridItem.Matchup.WorkTeam != null)
{
_eventScheduleValidatorsService.PoolGamesValidator.IsPoolGamesRestricted(gridItem.Matchup.WorkTeam, otherTeam, nameCallback);
}
foreach (var validationResult in validationScheduleResults)
yield return validationResult;
}

呼叫代码

if (scheduleSettings.MinimumTimeBetweenGames.HasValue)
{
// Get Division Teams And Teams Cross Playing
var minimumTimesBetween = GetMinimumTimeBetweenRow(scheduledMatchups, scheduleSettings.MinimumTimeBetweenGames.Value, gridItem.GameDuration, gridItem).Where(q => q != gridItem && (q.Matchup.DivisionId == gridItem.Matchup.DivisionId || ScheduleHelper.HasTeamGame(q.Matchup, gridItem.Matchup) || ScheduleHelper.HasSeededGame(q.Matchup, gridItem.Matchup))).ToList();
foreach (var divisionGame in minimumTimesBetween)
{
validationResults.AddRange(GetMinimumOverlappingPoolGames(gridItem, divisionGame, divisionGame.Matchup.AwayTeam, scheduleSettings.MinimumTimeBetweenGames.Value, scheduleSettings));
validationResults.AddRange(GetMinimumOverlappingPoolGames(gridItem, divisionGame, divisionGame.Matchup.HomeTeam, scheduleSettings.MinimumTimeBetweenGames.Value, scheduleSettings));
}
}

IsPoolGameRestricted

public bool IsPoolGamesRestricted(
EventScheduleTeamLayout currentTeam,
EventScheduleTeamLayout otherTeam,
Action<string> nameCallback)
{
nameCallback?.Invoke(FormatGameName.GetPoolName(currentTeam.PoolNumber, currentTeam.PoolName));
return true;
}

Answer 1

这不会导致任何内存泄漏，因为.NET运行时将为您管理内存分配，并确保只要这些对象仍在使用，它们就不会被清理。

https://learn.microsoft.com/en-us/dotnet/standard/garbage-collection/

对于使用回调与直接调用函数的性能，即使不相同，也应该非常相似。

顺便说一句，您可能还想看看使用async/await，而不是依赖回调来延迟执行，它提供了一种替代方案，而且可以说更容易阅读。