How to perform LINQ query over Enum?

Question

Below is my Enumerator List:

public enum StatusEnum
{
    Open = 1,
    Rejected = 2,
    Accepted = 3,
    Started = 4,
    Completed = 5,
    Canc         


        

Answer 1

First, if possible, I'd make your enum values powers of 2, so they could be OR'd together.

public enum StatusEnum
{
    Open = 1,
    Rejected = 2,
    Accepted = 4,
    Started = 8,
    Completed = 16,
    Cancelled = 32,
    Assigned = 64
}

Then you could do something like this:

public static List StatusList()
{
    var statusesToShow = Activity.StatusEnum.Open | Activity.StatusEnum.Rejected | Activity.StatusEnum.Accepted | Activity.StatusEnum.Started;

    return Enum
        .GetValues(typeof(Activity.StatusEnum))
        .Cast()
        .Where(x => (x & statusesToShow) == x)
        .ToList();
}

EDIT: In light of the fact that you can't change the enum values, I'd just recommend you use something like:

public static List StatusList()
{
    return new List {
        Activity.StatusEnum.Open, 
        Activity.StatusEnum.Rejected, 
        Activity.StatusEnum.Accepted, 
        Activity.StatusEnum.Started
    };
}