Question

如何比较C＃中的2个字符串，然后在分隔符上拆分，合并（删除重复项）并对项目进行排序？

var str1 = "123ABC;789XYZ";
var str2 = "456CDE;123ABC;012ABC";

var result = str1.SplitSortAndMerge(str2); // => result = "012ABC;123ABC;456CDE;789XYZ"

Answer 1

这应该对您有帮助。

var str2 = "456CDE;123ABC;012ABC";
var result = string.Join(";",str2.Split(new[]{";"},StringSplitOptions.RemoveEmptyEntries).Distinct().OrderBy(x=>x));

如果您需要包含str1，则

var str1 = "123ABC1";
var result = string.Join(";",str2.Split(new[]{";"},StringSplitOptions.RemoveEmptyEntries).Concat(new[]{str1}).Distinct().OrderBy(x=>x));

根据您上一次在OP中进行的更新，最好编写扩展方法。

public static class Extensions
{
    public static string SplitAndSort(this IEnumerable<string> source)
    {
        var list = source.Where(x=>x!=null)
                         .SelectMany(c=>c.Split(new[]{";"},StringSplitOptions.RemoveEmptyEntries))
                         .Distinct()
                         .OrderBy(x=>x);
        return string.Join(";",list);
    }
}

现在您可以使用

var str1 = "123ABC1;012ABC";
var str2 = "456CDE;123ABC;123ABC;012ABC";
(new []{str1,str2}).SplitAndSort();

输出

   012ABC;123ABC;123ABC1;456CDE

Answer 2

var str2 = "456CDE;123ABC;012ABC";
var result = string.Join(";",str2.Split(';').Distinct().OrderBy(x => x).ToList());

拆分，排序和合并字符串

2 个答案: