Question

我有一个变量来显示项目的RAG状态（红色，琥珀色，绿色）

var previousStatus = "R"
var currentStatus = "A"

我试图计算＆＃34;趋势＆＃34;有点喜欢

  var trend = CalculateTrend(previous, current)

我正在努力寻找比

更优雅的解决方案

            if (prev == current)
            return "Stable";
         if (prev == "R" && (current == "G" ||current == "A"))
              return "Improving";
         if (prev == "G" && (current == "R" ||current == "A"))
              return "Declining";
        if (prev == "A" && current == "G")
            return "Improving";
        if (prev == "A" && current == "R")
            return "Declining";

关于＆＃34;清洁剂的任何建议＆＃34;溶液

Answer 1

为每个状态创建一个带有整数值的enum。

public enum Status
{
    Red = 1,
    Amber = 2,
    Green = 3           
}

然后使用int.CompareTo方法。

switch(previous.CompareTo(current))
{
    case -1:
        return "Improving";

    case 0:
        return "Stable";

    case 1:
        return "Declining";
}

Answer 2

使用数字系统。使用等效数值对值进行评级。然后你可以使用数学。

Answer 3

如果您只想避免使用if语句，可以创建一个简单的查找字典：

private static string GetTrend(string prev, string cur)
{
    var trends = new Dictionary<string, string[]>()
    {
        {"Stable",    new[] {"AA", "RR", "GG"}},
        {"Improving", new[] {"RG", "RA", "AG"}},
        {"Declining", new[] {"GA", "GR", "AR"}},
    };

    return trends.Single(x => x.Value.Contains(prev + cur)).Key;
}

在C＃中，最简单的计算方法是什么？＆＃34;趋势＆＃34;给出当前和以前的状态？

3 个答案: