如何在 linq 中比较没有时间部分的日期？

Question

How can I compare date without Time part in Nullable DateTime? In my model I have datetime field as

public DateTime? AdjustmentDate { get; set; }

I tried to compare dates as

if (!request.reconciliationDate.Equals(DateTime.MinValue))
    filterResult = filterResult.Where(rd => 
        rd.AdjustmentDate <= request.reconciliationDate.Date).ToList(); 

and reconciliationDate declared as

public DateTime reconciliationDate { get; set; }

but when I search using reconciliationDate I get the date as {5/20/2020 12:00:00 AM} I enter date as 5/20/2020 . I am trying to compare with date 5/20/2020 but doesn't find it,

How can I take the time part out from nullable DateTime?

I tried DbFunctions.TruncateTime(request.reconciliationDate.Date) but i get DbFunctions doesnt contain definition TruncateTime

Answer 1

A Nullable<T> object stores the value of T in the .Value property, and has a handy .HasValue property to let you know if it's not null. So if you're comparing a DateTime? with a DateTime , you can do something like:

if (!request.reconciliationDate.Equals(DateTime.MinValue))
    filterResult = filterResult
        .Where(rd =>
            rd.AdjustmentDate.HasValue &&
            rd.AdjustmentDate.Value.Date <= request.reconciliationDate.Date)
        .ToList();

Answer 2

If(dt1.Date == dt2.Date) 这不会工作吗？