为什么C#OrderBy的字符串顺序小写，大写呢? [英] Why does C# OrderBy with string order lowercase before uppercase?

问题描述

我正在用C#进行编码，因此我需要订购一系列一个字符串.例如:

I'm coding in C# and I had a situation that needed me to order a series of one character string. example:

var list = new List<string> { "1", "A", "a", "0" };

由于我们都知道 ASCII 表在下"之前列出了上"，因此我期望它的排序方式是这样的(0，1，A，a)，但是它的排序方式是这样的(0，1，a，A)

Since we all know that the ASCII table lists Upper before Lower, I was expecting this to be ordered like this (0, 1, A, a), but it was ordered like this (0, 1, a, A)

我有一个简单的例子:

        var strs = new List<string> { "1", "A", "a", "0" };
        var orderedStrs = strs.OrderBy(l => l);
        Console.WriteLine("---strs---");
        foreach(var elem in strs){
            Console.WriteLine(elem);
        }
        Console.WriteLine("---orderedStrs---");
        foreach(var elem in orderedStrs){
            Console.WriteLine(elem);
        }

        var chars = new List<char> { '1', 'A', 'a', '0' };
        var orderedChars = chars.OrderBy(ch => ch);
        Console.WriteLine("---chars---");
        foreach(var elem in chars){
            Console.WriteLine(elem);
        }
        Console.WriteLine("---orderedChars---");
        foreach(var elem in orderedChars){
            Console.WriteLine(elem);
        }

这是输出:

        ---strs---
        1
        A
        a
        0
        --- orderedStrs---
        0
        1
        a
        A
        ---chars---
        1
        A
        a
        0
        --- orderedChars---
        0
        1
        A
        a

有人可以回答我这个问题吗?

Can anybody answer me this question?

推荐答案

您可以使用 OrderBy(a => a，StringComparer.Ordinal)

var strs = new List<string> { "1", "A", "a", "0" };
var orderedStrs = strs.OrderBy(l => l);
Console.WriteLine("---strs---");
foreach (var elem in strs.OrderBy(a => a, StringComparer.Ordinal))
{
    Console.WriteLine(elem);
}

结果

---strs---
0
1
A
a

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