90 lines
2.5 KiB
C#
90 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace MyCode.Project.Infrastructure
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{
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/// <summary>
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/// 排序帮助类
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/// </summary>
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public static class SortHelper
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{
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/// <summary>
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/// 获取一个根据ASCII码排序算法的实体
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/// </summary>
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/// <returns></returns>
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public static ASCIISort GetASCIISort()
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{
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return new ASCIISort();
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}
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}
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/// <summary>
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/// ASCII码排序算法
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/// </summary>
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public class ASCIISort : IComparer<string>
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{
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public int Compare(string x, string y)
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{
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var result = 0;
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//如果为空，则表示最小
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if (string.IsNullOrEmpty(x))
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{
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result = -1;
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}
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else if (string.IsNullOrEmpty(y))
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{
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result = 1;
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}
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else
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{
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//获取字符串的字符数组
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var xChars = x.ToCharArray();
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var yChars = y.ToCharArray();
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for (int i = 0; i < xChars.Length; i++)
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{
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//将字符转换为ASCII码
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var xc = (int)xChars[i];
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if (yChars.Length > i)
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{
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var yc = (int)yChars[i];
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//根据ASCII码比较大小，如果有比较结果则退出，否则继续下一个比较
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if (xc > yc)
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{
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result = 1;
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break;
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}
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else if (xc < yc)
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{
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result = -1;
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break;
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}
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else
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{
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result = 0;
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}
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}
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else
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{
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//如果Y已经没有字符了，则表示比X短,短的字符排在前面
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result = 1;
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break;
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}
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}
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//如果上面的比较结果为相等，并且X比Y短则表示X排在前面
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if (xChars.Length < yChars.Length && result == 0)
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{
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result = -1;
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}
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}
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return result;
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}
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}
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}
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