按字母然后数字按字符串字段对对象列表进行排序？

Question

What's a good way to sort an object with a list of strings that are alphanumeric?

I have a list of objects like this.

public class ObjectA
{
    public string A {get; set;}
}

var listOfItems = new List<ObjectA>() 
{ 
    new ObjectA() { A = "0000003F" }, 
    new ObjectA() { A = "00000035" }, 
    new ObjectA() { A = "TESTTEST" }, 
    new ObjectA() { A = "000633BX" } 
};

and when I use LINQ to sort these:

var sortedList = listOfItems.OrderBy(x => x.A);

I get this list:

00000035
0000003F
D0000033
12345678
0A000033
000633BX
TESTTEST

But would like this instead:

D0000033
TESTTEST
0A000033
0000003F
00000035
000633BX
12345678

How can I make the sorting be done by letter then number?

String is of fixed length at 8 characters all alphanumeric no special characters.

Answer 1

Your algorithm for ordering isn't clear, but here's an approach you can take. First, define a custom comparer:

public class ObjectAComparer : IComparer<ObjectA>
{
    public int Compare(ObjectA x, ObjectA y)
    {
        // Quite possibly not the ordering logic you want. Change as needed.
        // "IsNumber" means what you seem to have defined as numbers.
        bool xIsNumber = x.A.Any(c => char.IsNumber(c));
        bool yIsNumber = y.A.Any(c => char.IsNumber(c));

        bool sameKind = !(xIsNumber ^ yIsNumber);
        if (sameKind) return x.A.CompareTo(y.A); // Both numbers or both not numbers

        if (xIsNumber) return 1;

        return -1;
    }
}

Then you can use the overload of OrderBy that takes a comparer:

var sortedList = listOfItems.OrderBy(x => x, new ObjectAComparer());

Output:

TESTTEST 
00000035 
0000003F 
000633BX