How to Parse Abbreviated Day of Week String to DayofWeek-CodePudding

I have a string of abbreviated days of week e.g. "M Tu W Th F". I need to parse it to DayOfWeek.

Let's say I've converted the string to an array of strings. How do I parse each of those values to DayOfWeek?

Is there a way to do this without a custom function?

I'm aware of the method below for standard "Monday,"Tuesday"...." but how do we use that with the above shortened format?

var EnumDay = ((DayOfWeek)Enum.Parse(typeof(DayOfWeek), "M"));

CodePudding user response：

You can't parse those using the framework directly. Instead, you need something like a switch statement, or a switch expression if you are using a modern version of C#. For example:

public DayOfWeek Parse(string value)
{
    return value switch
    {
        "M" => DayOfWeek.Monday,
        "Tu" => DayOfWeek.Tuesday,
        "W" => DayOfWeek.Wednesday,
        "Th" => DayOfWeek.Thursday,
        "F" => DayOfWeek.Friday,
        _ => throw new Exception("Not a valid day of the week, or maybe it's a weekend, go outside and play")
    };
}

And use like this:

var day = Parse("Th");