如何在同一列下的实体框架中使用“ AND”

Question

I have been looking for a way to retrieve some specific information from a table but it's nor retrieving any result, I am using Entity Framework and C#.

var plans = (
    from p in context.AirTables 
    where p.eflID == 536 && p.eflID == 537 
    select p)
    .ToList();

The if (plans.Count() != 0) is giving me 0 as value, and I am 100% sure that the information which I am retrieving is correct.

Can somebody help me out?

Thanks in advance

Answer 1

Your are probably trying to retrieve the AirTables that cointain in the column eflID either 536 or 537 values. You could do it in several ways.

int[] ids = new int[] { 536, 537};
var plans = context.AirTables.Where(x=> ids.Contains(x.eflID)).ToList();

or

var plans = context.AirTables.Where(x=> x.eflID ==536 || x.eflID == 537).ToList();

the first one should translate into ... where eflID in (536, 537) and the second one into ... where eflID=536 OR eflID = 537

Answer 2

您需要使用OR而不是And检查

var plans = context.AirTables.Where(x=> x.eflID ==536 || x.eflID == 537).ToList()