Linq 忽略 OrderBy 中的空格

Question

I am running a query to retrieve a list of suburbs. When I apply an OrderBy (I want the ordered alphabetically)

query.OrderBy(s => s.Name);

I am given the following order:

MOUNT ADA
MOUNTAIN BAY
MOUNTAIN GATE
MOUNTAIN VIEW
MOUNT ALFRED
MOUNT BEAUTY

It appears that the spaces are ignored and ordering by the suburb name without spaces. What do I need to do to order by correctly? I think they should be in the following order:

MOUNT ADA
MOUNT ALFRED
MOUNT BEAUTY
MOUNTAIN BAY
MOUNTAIN GATE
MOUNTAIN VIEW

Answer 1

It appears that your database setting are having an affect on the sorting order due to the spaces between the individual character groupings. If you where to replace those spaces using the string method Replace() the result set might get the needed results. But, without having a PostgreSQL 12.1 Database with your specific setting it is impossible to know whether this will generate the desired results.

    private static void TestOrderList()
    {
        var list = new List<string>();
        list.Add("MOUNTAIN GATE");
        list.Add("MOUNT ADA");
        list.Add("MOUNTXADA");
        list.Add("MOUNTAIN BAY APP TOAST");
        list.Add("MOUNTAIN BAY APP ATOAST");
        list.Add("MOUNTAIN BAY APPA");
        list.Add("MOUNTAIN BAY");
        list.Add("MOUNT ALFRED");
        list.Add("MOUNTAIN VIEW");
        list.Add("MOUNT BEAUTY");

        var q = list.AsEnumerable().OrderBy(r => r.Replace("~", ""));
        q.ToList().ForEach(s => Console.WriteLine(s));
    }

Disclaimer : This is not so much a solution, but more like a test case. I choose a Tilda since it is low on the sorting order of ASCII characters.

Answer 2

I have not changed any logic, but a simple iteration gave me the expected results.

public class LinqOrderingForWords
{
    IList<string> _places;

    public LinqOrderingForWords()
    {
        _places = new List<string> { "MOUNT ADA", "MOUNTAIN BAY", "MOUNT BEAUTY", "MOUNTAIN VIEW", "MOUNTAIN GATE", "MOUNT ALFRED", "MOUNT ADA ONE" };
    }

    public void OrderPlaces()
    {
        var sorted = _places.OrderBy(s => s);
        sorted.ToList().ForEach(s => Console.WriteLine(s));
    }
}

See the dotnet fiddle here .

Is this what you desire to see?