C# Sort Array by multiple different conditions-CodePudding

I got an array which contains items of the object 'Person'

I need to have the special people on top (those sorted by Id) and the nonspecial people below (those sorted alphabetically). It should look like this:

Is there a way of sorting it like this without having to split the list, sort it individually and then merging it back together?

CodePudding user response：

First you can OrderBy by Special (note that false < true) and then you can use condition within ThenBy like this:

var result = persons
  .OrderBy(person => person.Special != "Yes")
  .ThenBy(person => person.Special == "Yes" ? person.Id : 0)
  .ThenBy(person => person.Special == "Yes" ? "" : person.Name);

CodePudding user response：

A non-linq version:

list.Sort((a, b) =>
{
    if (a.Special != b.Special)
    {
        return a.Special ? -1 : 1;
    }

    return a.Name.CompareTo(b.Name);
});