如果 linq c# 中的条件如何使用？

Question

I have a table of data having startdate , enddate and time for example

startdate     enddate          time
03/19/2020    03/19/2020       15:23
03/19/2020    03/20/2020       12:26
03/19/2020    03/19/2020       05:23
03/19/2020    03/19/2020       09:23
03/19/2020    03/21/2020       04:23 

I want to use LINQ query to get a minimum of time when startdate = enddate

I use this query

time = table.Where(x => x.StartDate == x.EndDate).Min(x=>x.time)

but when I run this code it gives me exception InValidOperationException was unhandled by user code

another query I have to use is

time = table.OrderBy(x=>x.StartDate == x.EndDate).First().Time

but it is giving me an incorrect output

Any suggestion how can I fix this

Answer 1

You can try this way

time = table.OrderBy(x => x.time).FirstOrDefault(x => x.StartDate == x.EndDate)?.time;

Answer 2

Please check if your data is really equal, they may contain invisible blank characters. If that were the case, it would lead to the problem. you can use table.ToList() and set a breakpoint to debug.

Answer 3

Maybe:

time = table.Where(e => e.StartDate == e.EndDate).OrderBy(e => e.Time).FirstOrDefault()