C# cast IEnumerable<；T>；到字典<；国际贸易，T>；_C#

C# cast IEnumerable<；T>；到字典<；国际贸易，T>；

C# cast IEnumerable<；T>；到字典<；国际贸易，T>；,c#,C#,我有一个返回类型为的方法： IEnumerable<T> ID是唯一的，必须在我的字典中用作键，其他字段必须映射到LeaveTypeDto。您可以指定要从可枚举项中获取的键或键和值如果我有这样一门课： public class MyClass { public int Id {get;set;} public string Name {get;set;} } 我可以写以下内容来获得一本词典： IEnumerable值； IDictionary valueDict

我有一个返回类型为的方法：

IEnumerable<T>

ID是唯一的，必须在我的字典中用作键，其他字段必须映射到LeaveTypeDto。

您可以指定要从可枚举项中获取的键或键和值

如果我有这样一门课：

public class MyClass
{
    public int Id {get;set;}
    public string Name {get;set;}
}

我可以写以下内容来获得一本

词典

：

IEnumerable值；
IDictionary valueDict=values.ToDictionary（t=>t.Id）；

或通过以下方式获得

词典

：

IEnumerable值；
IDictionary valueDict=values.ToDictionary（t=>t.Id，t=>t.Name）；

那

系统.Linq呢

GetList(string.Empty).ToDictionary(k => int.Parse(k.ID))

注意，如果

ID

是

string

，则前面的示例有效，如果它是

int

，则更简单

GetList(string.Empty).ToDictionary(k => k.ID)

如果ID是

的一部分，则将类型保留为
var q = GetList(string.Empty).ToDictionary(b => b.ID);

否则，请使用select重载获取索引，然后使用ToDictionary（）

我在LeaveType上定义了一个扩展方法：
public static DTO.LeaveTypeDto ToDto(this DataModel.Timekeeper.LeaveType leaveType)
        {
            return new DTO.LeaveTypeDto
            {
                ID = leaveType.ID,
                Code = leaveType.Code,
                Title = leaveType.Title,
                DailyAvailable = leaveType.DailyAvailable,
                HourlyAvailable = leaveType.HourlyAvailable,
                ShiftBaseAvailable = leaveType.ShiftBaseAvailable,
                PredefinedRemaining = leaveType.PredefinedRemaining,
                Active = leaveType.Active,
                StandardLeaveType = leaveType.StandardLeaveType,
                NotRequestAutomaticaly = leaveType.NotRequestAutomaticaly,
                TemplateFileID = leaveType.TemplateFileID,
                ObligateChooseSubstituteForDailyLeave = leaveType.ObligateChooseSubstituteForDailyLeave,
                ObligateChooseSubstituteForHourlyLeave = leaveType.ObligateChooseSubstituteForHourlyLeave,
                ObligateChooseSubstituteForShiftBaseLeave = leaveType.ObligateChooseSubstituteForShiftBaseLeave,
                ObligateChooseInsertAttachment = leaveType.ObligateChooseInsertAttachment,
                CheckSubstituteLimit = leaveType.CheckSubstituteLimit,
                AbsenceRespiteYearXferLimitDays = leaveType.AbsenceRespiteYearXferLimitDays,
                AbsenceRespiteYearXferMode = leaveType.AbsenceRespiteYearXferMode,
                AbsenceRespiteYearXferValuesSummarize = leaveType.AbsenceRespiteYearXferValuesSummarize,
                DailyRequestRegisterRespite = leaveType.DailyRequestRegisterRespite,
                DayMaxHourlyMinutes = leaveType.DayMaxHourlyMinutes,
                DayWorkMinutes = leaveType.WorkingPeriodMaxHourlyMinutes,
                DecreaseAllOnNXOverflow = leaveType.DecreaseAllOnNXOverflow,
                DecreaseBasedOnMonthWorkingDays = leaveType.DecreaseBasedOnMonthWorkingDays,
                DecreaseDayWorkMinutesOnExtraWorkDays = leaveType.DecreaseDayWorkMinutesOnExtraWorkDays,
                DecreaseOnExtraWorkDays = leaveType.DecreaseOnExtraWorkDays,
                DecreaseOnHolidays = leaveType.DecreaseOnHolidays,
                HourlyInOFFDayAvailable=leaveType.HourlyInOFFDayAvailable,
                YearXferValuesSummarize = leaveType.YearXferValuesSummarize,
                YearXferPercentage=leaveType.YearXferPercentage,
                MaxContinuousDaysLimit = leaveType.MaxContinuousDaysLimit,
                HourlyRequestRegisterRespite = leaveType.HourlyRequestRegisterRespite,
                YearXferMode = leaveType.YearXferMode,
                MonthlyDaysLimit = leaveType.MonthlyDaysLimit,
                MonthlyXMinsLimit = leaveType.MonthlyXMinsLimit,
                YearXferLimitDays = leaveType.YearXferLimitDays,
                YearLimitDays = leaveType.YearLimitDays,
                MonthStorable = leaveType.MonthStorable,
                YearHourlyMinsLimit = leaveType.YearHourlyMinsLimit,
                MonthPreusable = leaveType.MonthPreusable,
                MonthlyNXMinsLimit = leaveType.MonthlyNXMinsLimit,
                MonthMaxHourlyMinutes = leaveType.MonthMaxHourlyMinutes,
                IncreaseAbsenceRespiteRemaining = leaveType.IncreaseAbsenceRespiteRemaining,
                DailyLeaveRequestCountPerMonthForOthers = leaveType.DailyLeaveRequestCountPerMonthForOthers,
                DailyLeaveRequestDurationPerMonthForOthers = leaveType.DailyLeaveRequestDurationPerMonthForOthers,
                ShiftLeaveRequestCountPerMonthForOthers = leaveType.ShiftLeaveRequestCountPerMonthForOthers,
                ShiftLeaveRequestDurationPerMonthForOthers = leaveType.ShiftLeaveRequestDurationPerMonthForOthers,
                HourlyLeaveRequestCountPerMonthForOthers = leaveType.HourlyLeaveRequestCountPerMonthForOthers,
                UseLeaveRequetLimitForOthersPerMonth = leaveType.UseLeaveRequetLimitForOthersPerMonth,
                DailyCountPerMonth = leaveType.DailyCountPerMonth,
                CheckMeritRemainingInUnpayedRequest = leaveType.CheckMeritRemainingInUnpayedRequest,
                DayMinHourlyMinutes = leaveType.DayMinHourlyMinutes,
                FirstPresenceRangeHourlyCountPerMonth = leaveType.FirstPresenceRangeHourlyCountPerMonth,
                FirstPresenceRangeLenght = leaveType.FirstPresenceRangeLenght,
                FirstPresenceRangeMaxHourlyLimit = leaveType.FirstPresenceRangeMaxHourlyLimit,
                FirstPresenceRangeMinHourlyLimit= leaveType.FirstPresenceRangeMinHourlyLimit,
                HourlyCountPerMonth = leaveType.HourlyCountPerMonth,
                HourlyLeaveRequestDurationPerMonthForOthers = leaveType.HourlyLeaveRequestDurationPerMonthForOthers,
                IsMonthMaxHourlyStorableToCurrent = leaveType.IsMonthMaxHourlyStorableToCurrent,
                LastPresenceRangeHourlyCountPerMonth = leaveType.LastPresenceRangeHourlyCountPerMonth,
                LastPresenceRangeLenght = leaveType.LastPresenceRangeLenght,
                LastPresenceRangeMaxHourlyLimit = leaveType.LastPresenceRangeMaxHourlyLimit,
                LastPresenceRangeMinHourlyLimit = leaveType.LastPresenceRangeMinHourlyLimit,
                MiddlePresenceRangeHourlyCountPerMonth = leaveType.MiddlePresenceRangeHourlyCountPerMonth,
                MiddlePresenceRangeMaxHourlyLimit = leaveType.MiddlePresenceRangeMaxHourlyLimit,
                MiddlePresenceRangeMinHourlyLimit = leaveType.MiddlePresenceRangeMinHourlyLimit,
                MonthMaxDailyDays=leaveType.MonthMaxDailyDays,
                MonthMaxHourlyStorable=leaveType.MonthMaxHourlyStorable,
                ShiftBaseCountPerMonth=leaveType.ShiftBaseCountPerMonth,
                SuspendsPersonnelStatus=leaveType.SuspendsPersonnelStatus,
                WorkingPeriodMaxHourlyMinutes=leaveType.WorkingPeriodMaxHourlyMinutes,
                YearXMonthMaxHourlyferLimitHours=leaveType.YearXMonthMaxHourlyferLimitHours,
                YearXMonthMaxHourlyferMode=leaveType.YearXMonthMaxHourlyferMode
            };
        }

这样我的问题就解决了。：）
GetList(string.Empty).ToDictionary(k => int.Parse(k.ID))

GetList(string.Empty).ToDictionary(k => k.ID)

var q = GetList(string.Empty).ToDictionary(b => b.ID);

var q = GetList(string.Empty).Select((element, index) => new { i= index, e = element }).ToDictionary(b => b.i, b => b.e);

public static DTO.LeaveTypeDto ToDto(this DataModel.Timekeeper.LeaveType leaveType)
        {
            return new DTO.LeaveTypeDto
            {
                ID = leaveType.ID,
                Code = leaveType.Code,
                Title = leaveType.Title,
                DailyAvailable = leaveType.DailyAvailable,
                HourlyAvailable = leaveType.HourlyAvailable,
                ShiftBaseAvailable = leaveType.ShiftBaseAvailable,
                PredefinedRemaining = leaveType.PredefinedRemaining,
                Active = leaveType.Active,
                StandardLeaveType = leaveType.StandardLeaveType,
                NotRequestAutomaticaly = leaveType.NotRequestAutomaticaly,
                TemplateFileID = leaveType.TemplateFileID,
                ObligateChooseSubstituteForDailyLeave = leaveType.ObligateChooseSubstituteForDailyLeave,
                ObligateChooseSubstituteForHourlyLeave = leaveType.ObligateChooseSubstituteForHourlyLeave,
                ObligateChooseSubstituteForShiftBaseLeave = leaveType.ObligateChooseSubstituteForShiftBaseLeave,
                ObligateChooseInsertAttachment = leaveType.ObligateChooseInsertAttachment,
                CheckSubstituteLimit = leaveType.CheckSubstituteLimit,
                AbsenceRespiteYearXferLimitDays = leaveType.AbsenceRespiteYearXferLimitDays,
                AbsenceRespiteYearXferMode = leaveType.AbsenceRespiteYearXferMode,
                AbsenceRespiteYearXferValuesSummarize = leaveType.AbsenceRespiteYearXferValuesSummarize,
                DailyRequestRegisterRespite = leaveType.DailyRequestRegisterRespite,
                DayMaxHourlyMinutes = leaveType.DayMaxHourlyMinutes,
                DayWorkMinutes = leaveType.WorkingPeriodMaxHourlyMinutes,
                DecreaseAllOnNXOverflow = leaveType.DecreaseAllOnNXOverflow,
                DecreaseBasedOnMonthWorkingDays = leaveType.DecreaseBasedOnMonthWorkingDays,
                DecreaseDayWorkMinutesOnExtraWorkDays = leaveType.DecreaseDayWorkMinutesOnExtraWorkDays,
                DecreaseOnExtraWorkDays = leaveType.DecreaseOnExtraWorkDays,
                DecreaseOnHolidays = leaveType.DecreaseOnHolidays,
                HourlyInOFFDayAvailable=leaveType.HourlyInOFFDayAvailable,
                YearXferValuesSummarize = leaveType.YearXferValuesSummarize,
                YearXferPercentage=leaveType.YearXferPercentage,
                MaxContinuousDaysLimit = leaveType.MaxContinuousDaysLimit,
                HourlyRequestRegisterRespite = leaveType.HourlyRequestRegisterRespite,
                YearXferMode = leaveType.YearXferMode,
                MonthlyDaysLimit = leaveType.MonthlyDaysLimit,
                MonthlyXMinsLimit = leaveType.MonthlyXMinsLimit,
                YearXferLimitDays = leaveType.YearXferLimitDays,
                YearLimitDays = leaveType.YearLimitDays,
                MonthStorable = leaveType.MonthStorable,
                YearHourlyMinsLimit = leaveType.YearHourlyMinsLimit,
                MonthPreusable = leaveType.MonthPreusable,
                MonthlyNXMinsLimit = leaveType.MonthlyNXMinsLimit,
                MonthMaxHourlyMinutes = leaveType.MonthMaxHourlyMinutes,
                IncreaseAbsenceRespiteRemaining = leaveType.IncreaseAbsenceRespiteRemaining,
                DailyLeaveRequestCountPerMonthForOthers = leaveType.DailyLeaveRequestCountPerMonthForOthers,
                DailyLeaveRequestDurationPerMonthForOthers = leaveType.DailyLeaveRequestDurationPerMonthForOthers,
                ShiftLeaveRequestCountPerMonthForOthers = leaveType.ShiftLeaveRequestCountPerMonthForOthers,
                ShiftLeaveRequestDurationPerMonthForOthers = leaveType.ShiftLeaveRequestDurationPerMonthForOthers,
                HourlyLeaveRequestCountPerMonthForOthers = leaveType.HourlyLeaveRequestCountPerMonthForOthers,
                UseLeaveRequetLimitForOthersPerMonth = leaveType.UseLeaveRequetLimitForOthersPerMonth,
                DailyCountPerMonth = leaveType.DailyCountPerMonth,
                CheckMeritRemainingInUnpayedRequest = leaveType.CheckMeritRemainingInUnpayedRequest,
                DayMinHourlyMinutes = leaveType.DayMinHourlyMinutes,
                FirstPresenceRangeHourlyCountPerMonth = leaveType.FirstPresenceRangeHourlyCountPerMonth,
                FirstPresenceRangeLenght = leaveType.FirstPresenceRangeLenght,
                FirstPresenceRangeMaxHourlyLimit = leaveType.FirstPresenceRangeMaxHourlyLimit,
                FirstPresenceRangeMinHourlyLimit= leaveType.FirstPresenceRangeMinHourlyLimit,
                HourlyCountPerMonth = leaveType.HourlyCountPerMonth,
                HourlyLeaveRequestDurationPerMonthForOthers = leaveType.HourlyLeaveRequestDurationPerMonthForOthers,
                IsMonthMaxHourlyStorableToCurrent = leaveType.IsMonthMaxHourlyStorableToCurrent,
                LastPresenceRangeHourlyCountPerMonth = leaveType.LastPresenceRangeHourlyCountPerMonth,
                LastPresenceRangeLenght = leaveType.LastPresenceRangeLenght,
                LastPresenceRangeMaxHourlyLimit = leaveType.LastPresenceRangeMaxHourlyLimit,
                LastPresenceRangeMinHourlyLimit = leaveType.LastPresenceRangeMinHourlyLimit,
                MiddlePresenceRangeHourlyCountPerMonth = leaveType.MiddlePresenceRangeHourlyCountPerMonth,
                MiddlePresenceRangeMaxHourlyLimit = leaveType.MiddlePresenceRangeMaxHourlyLimit,
                MiddlePresenceRangeMinHourlyLimit = leaveType.MiddlePresenceRangeMinHourlyLimit,
                MonthMaxDailyDays=leaveType.MonthMaxDailyDays,
                MonthMaxHourlyStorable=leaveType.MonthMaxHourlyStorable,
                ShiftBaseCountPerMonth=leaveType.ShiftBaseCountPerMonth,
                SuspendsPersonnelStatus=leaveType.SuspendsPersonnelStatus,
                WorkingPeriodMaxHourlyMinutes=leaveType.WorkingPeriodMaxHourlyMinutes,
                YearXMonthMaxHourlyferLimitHours=leaveType.YearXMonthMaxHourlyferLimitHours,
                YearXMonthMaxHourlyferMode=leaveType.YearXMonthMaxHourlyferMode
            };
        }

GetList(string.Empty).ToDictionary(lt => lt.ID, lt => lt.ToDto())