LINQ，无法构造日期时间

Question

我需要构造 linq，但是天（日期时间类型，i.AllowedTime.AllowedDate.Day）、小时和分钟（int 类型）存储方式不同。我努力做到：

        DateTime date = DateTime.Now.Date;
        IQueryable<ITW2012Mobile.Core.DataTable.MeetingModel2> result = null;
        if (status == MeetingStatus.RequestedOfYou)
        {

            result = from i in _dbContext.Meetings
                     where i.UserInvitedID == CurrentUserID && i.MeetingStatus == null && EntityFunctions.TruncateTime(i.AllowedTime.AllowedDate.Day) >= date
                     select new ITW2012Mobile.Core.DataTable.MeetingModel2()
                     {
                         Name = i.UserInviter.FirstName + " " + i.UserInviter.LastName,
                         Company = i.UserInviter.Company,
                         MeetingID = i.MeetingID,
                         Time = EntityFunctions.AddMinutes(EntityFunctions.AddHours(i.AllowedTime.AllowedDate.Day, i.AllowedTime.Hour).Value, i.AllowedTime.Minute).Value,
                         Image = i.UserInviter.ProfileImage,
                         Username = i.UserInviter.aspnet_User.UserName
                     };
        }

但有一个例外：

{"日期函数 dateadd 不支持 datepart 小时 输入日期。"}

怎么做？

添加类 MeetingModel2

public class MeetingModel2
{
    public int MeetingID { get; set; }
    public string Name { get; set; }
    public string Company { get; set; }
    public DateTime Time { get; set; }
    public string Image { get; set; }
    public string Username { get; set; }
}

Answer 1

您正在查询的数据库中的“时间”字段可能是Date 数据类型。您不能执行时间操作，例如将分钟或小时添加到日期类型。如果您将该字段更改为DateTime，您可能会没事。