如何遍历DateTime列表并将其作为参数发送给函数
本文关键字:参数 函数 何遍历 遍历 列表 DateTime | 更新日期: 2023-09-27 18:26:36
如何迭代返回DateTime list的列表,并将单个日期传递给需要DateTime参数的函数?以下是我的LINQ查询,返回日期列表:
var lastModifiedDates = context.Reviews
.Where(s => s.IsActive == true)
.Where(s => s.ReviewStatusId == (int)ReviewStatuses.EmployeeSignature)
.Select(v => v.ModifiedDate)
.ToList();
以下是我如何通过日期:
foreach (var lastModifiedDate in lastModifiedDates)
{
AddBusinessDay(lastModifiedDate, 15);
}
以下是AddBusinessDay
函数的样子:
public static DateTime AddBusinessDay (DateTime date, int days)
在AddBusinessDay(lastModifiedDate, 15);
上,我得到以下错误:
错误28"EvaluationFormAccess.AddBusinessDay(System.DateTime,int)"的最佳重载方法匹配包含一些无效参数
审查实体:
public int ReviewId { get; set; }
public System.Guid ReviewGuid { get; set; }
public int ReviewStatusId { get; set; }
public int PersonId { get; set; }
public int SupervisorId { get; set; }
public int ReviewYearId { get; set; }
public Nullable<bool> EmployeeOnLeave { get; set; }
public Nullable<bool> PlanInPlace { get; set; }
public string EmployeeComments { get; set; }
public string EmployeeSignature { get; set; }
public Nullable<System.DateTime> EmployeeSignDate { get; set; }
public string ManagerComments { get; set; }
public string ManagerSignature { get; set; }
public Nullable<System.DateTime> ManagerSignDate { get; set; }
public System.DateTime CreatedDate { get; set; }
public System.Guid CreatedBy { get; set; }
public Nullable<System.DateTime> ModifiedDate { get; set; }
public Nullable<System.Guid> ModifiedBy { get; set; }
public bool IsActive { get; set; }
您的ModifiedDate
属性实际上是一个Nullable<DateTime>
(也可以写成DateTime?
),它实际上根本不是一个DateTime
。
你有两个选择:
在LINQ查询中将可能的DateTime
解析为实际的DateTime
var lastModifiedDates = context.Reviews
.Where(s => s.IsActive == true)
.Where(s => s.ReviewStatusId == (int)ReviewStatuses.EmployeeSignature)
.Where(v => v.ModifiedDate.HasValue)
.Select(v => v.ModifiedDate.Value)
.ToList();
或者在你的循环中进行:
foreach (var lastModifiedDate in lastModifiedDates)
{
if (lastModifiedDate.HasValue)
AddBusinessDay(lastModifiedDate.Value, 15);
}
Ksv3n 提供的环路解决方案