使州名缩写为州名

Question

是否内置了.NET功能,可以用州名来制作州缩写？

我知道函数写起来并不困难,但我认为MS已经想到了比下面的x50更有效的方法:

if statename.tolower = "new york" then 
  statename = "NY"
else if

任何其他使这更高效的想法也值得赞赏.

Answer 1

我希望这有帮助

    public string GetState(State state)
    {
        switch (state)
        {
            case State.AL:
                return "ALABAMA";

            case State.AK:
                return "ALASKA";

            case State.AS:
                return "AMERICAN SAMOA";

            case State.AZ:
                return "ARIZONA";

            case State.AR:
                return "ARKANSAS";

            case State.CA:
                return "CALIFORNIA";

            case State.CO:
                return "COLORADO";

            case State.CT:
                return "CONNECTICUT";

            case State.DE:
                return "DELAWARE";

            case State.DC:
                return "DISTRICT OF COLUMBIA";

            case State.FM:
                return "FEDERATED STATES OF MICRONESIA";

            case State.FL:
                return "FLORIDA";

            case State.GA:
                return "GEORGIA";

            case State.GU:
                return "GUAM";

            case State.HI:
                return "HAWAII";

            case State.ID:
                return "IDAHO";

            case State.IL:
                return "ILLINOIS";

            case State.IN:
                return "INDIANA";

            case State.IA:
                return "IOWA";

            case State.KS:
                return "KANSAS";

            case State.KY:
                return "KENTUCKY";

            case State.LA:
                return "LOUISIANA";

            case State.ME:
                return "MAINE";

            case State.MH:
                return "MARSHALL ISLANDS";

            case State.MD:
                return "MARYLAND";

            case State.MA:
                return "MASSACHUSETTS";

            case State.MI:
                return "MICHIGAN";

            case State.MN:
                return "MINNESOTA";

            case State.MS:
                return "MISSISSIPPI";

            case State.MO:
                return "MISSOURI";

            case State.MT:
                return "MONTANA";

            case State.NE:
                return "NEBRASKA";

            case State.NV:
                return "NEVADA";

            case State.NH:
                return "NEW HAMPSHIRE";

            case State.NJ:
                return "NEW JERSEY";

            case State.NM:
                return "NEW MEXICO";

            case State.NY:
                return "NEW YORK";

            case State.NC:
                return "NORTH CAROLINA";

            case State.ND:
                return "NORTH DAKOTA";

            case State.MP:
                return "NORTHERN MARIANA ISLANDS";

            case State.OH: 
                return "OHIO";

            case State.OK:
                return "OKLAHOMA";

            case State.OR:
                return "OREGON";

            case State.PW:
                return "PALAU";

            case State.PA:
                return "PENNSYLVANIA";

            case State.PR:
                return "PUERTO RICO";

            case State.RI:
                return "RHODE ISLAND";

            case State.SC:
                return "SOUTH CAROLINA";

            case State.SD:
                return "SOUTH DAKOTA";

            case State.TN:
                return "TENNESSEE";

            case State.TX:
                return "TEXAS";

            case State.UT:
                return "UTAH";

            case State.VT:
                return "VERMONT";

            case State.VI:
                return "VIRGIN ISLANDS";

            case State.VA:
                return "VIRGINIA";

            case State.WA:
                return "WASHINGTON";

            case State.WV:
                return "WEST VIRGINIA";

            case State.WI:
                return "WISCONSIN";

            case State.WY:
                return "WYOMING";
        }

        throw new Exception("Not Available");
    }
}


public State GetStateByName(string name)
        {
            switch (name.ToUpper())
            {
                case "ALABAMA":
                    return State.AL;

                case "ALASKA":
                    return State.AK;

                case "AMERICAN SAMOA":
                    return State.AS;

                case "ARIZONA":
                    return State.AZ;

                case "ARKANSAS":
                    return State.AR;

                case "CALIFORNIA":
                    return State.CA;

                case "COLORADO":
                    return State.CO;

                case "CONNECTICUT":
                    return State.CT;

                case "DELAWARE":
                    return State.DE;

                case "DISTRICT OF COLUMBIA":
                    return State.DC;

                case "FEDERATED STATES OF MICRONESIA":
                    return State.FM;

                case "FLORIDA":
                    return State.FL;

                case "GEORGIA":
                    return State.GA;

                case "GUAM":
                    return State.GU;

                case "HAWAII":
                    return State.HI;

                case "IDAHO":
                    return State.ID;

                case "ILLINOIS":
                    return State.IL;

                case "INDIANA":
                    return State.IN;

                case "IOWA":
                    return State.IA;

                case "KANSAS":
                    return State.KS;

                case "KENTUCKY":
                    return State.KY;

                case "LOUISIANA":
                    return State.LA;

                case "MAINE":
                    return State.ME;

                case "MARSHALL ISLANDS":
                    return State.MH;

                case "MARYLAND":
                    return State.MD;

                case "MASSACHUSETTS":
                    return State.MA;

                case "MICHIGAN":
                    return State.MI;

                case "MINNESOTA":
                    return State.MN;

                case "MISSISSIPPI":
                    return State.MS;

                case "MISSOURI":
                    return State.MO;

                case "MONTANA":
                    return State.MT;

                case "NEBRASKA":
                    return State.NE;

                case "NEVADA":
                    return State.NV;

                case "NEW HAMPSHIRE":
                    return State.NH;

                case "NEW JERSEY":
                    return State.NJ;

                case "NEW MEXICO":
                    return State.NM;

                case "NEW YORK":
                    return State.NY;

                case "NORTH CAROLINA":
                    return State.NC;

                case "NORTH DAKOTA":
                    return State.ND;

                case "NORTHERN MARIANA ISLANDS":
                    return State.MP;

                case "OHIO":
                    return State.OH;

                case "OKLAHOMA":
                    return State.OK;

                case "OREGON":
                    return State.OR;

                case "PALAU":
                    return State.PW;

                case "PENNSYLVANIA":
                    return State.PA;

                case "PUERTO RICO":
                    return State.PR;

                case "RHODE ISLAND":
                    return State.RI;

                case "SOUTH CAROLINA":
                    return State.SC;

                case "SOUTH DAKOTA":
                    return State.SD;

                case "TENNESSEE":
                    return State.TN;

                case "TEXAS":
                    return State.TX;

                case "UTAH":
                    return State.UT;

                case "VERMONT":
                    return State.VT;

                case "VIRGIN ISLANDS":
                    return State.VI;

                case "VIRGINIA":
                    return State.VA;

                case "WASHINGTON":
                    return State.WA;

                case "WEST VIRGINIA":
                    return State.WV;

                case "WISCONSIN":
                    return State.WI;

                case "WYOMING":
                    return State.WY;
            }

            throw new Exception("Not Available");
        }

public enum State
    {
        AL,
        AK,
        AS,
        AZ,
        AR,
        CA,
        CO,
        CT,
        DE,
        DC,
        FM,
        FL,
        GA,
        GU,
        HI,
        ID,
        IL,
        IN,
        IA,
        KS,
        KY,
        LA,
        ME,
        MH,
        MD,
        MA,
        MI,
        MN,
        MS,
        MO,
        MT,
        NE,
        NV,
        NH,
        NJ,
        NM,
        NY,
        NC,
        ND,
        MP,
        OH,
        OK,
        OR,
        PW,
        PA,
        PR,
        RI,
        SC,
        SD,
        TN,
        TX,
        UT,
        VT,
        VI,
        VA,
        WA,
        WV,
        WI,
        WY
    }

Answer 2

刚刚谈到Homam的回答.我有switch语句返回带有标准外壳的状态.

        switch (stateCode)
        {
            case "AL":
                return "Alabama";

            case "AK":
                return "Alaska";

            case "AS":
                return "American Samoa";

            case "AZ":
                return "Arizona";

            case "AR":
                return "Arkansas";

            case "CA":
                return "California";

            case "CO":
                return "Colorado";

            case "CT":
                return "Connecticut";

            case "DE":
                return "Delaware";

            case "DC":
                return "District Of Columbia";

            case "FM":
                return "Federated States Of Micronesia";

            case "FL":
                return "Florida";

            case "GA":
                return "Georgia";

            case "GU":
                return "Guam";

            case "HI":
                return "Hawaii";

            case "ID":
                return "Idaho";

            case "IL":
                return "Illinois";

            case "IN":
                return "Indiana";

            case "IA":
                return "Iowa";

            case "KS":
                return "Kansas";

            case "KY":
                return "Kentucky";

            case "LA":
                return "Louisiana";

            case "ME":
                return "Maine";

            case "MH":
                return "Marshall Islands";

            case "MD":
                return "Maryland";

            case "MA":
                return "Massachusetts";

            case "MI":
                return "Michigan";

            case "MN":
                return "Minnesota";

            case "MS":
                return "Mississippi";

            case "MO":
                return "Missouri";

            case "MT":
                return "Montana";

            case "NE":
                return "Nebraska";

            case "NV":
                return "Nevada";

            case "NH":
                return "New Hampshire";

            case "NJ":
                return "New Jersey";

            case "NM":
                return "New Mexico";

            case "NY":
                return "New York";

            case "NC":
                return "North Carolina";

            case "ND":
                return "North Dakota";

            case "MP":
                return "Northern Mariana Islands";

            case "OH":
                return "Ohio";

            case "OK":
                return "Oklahoma";

            case "OR":
                return "Oregon";

            case "PW":
                return "Palau";

            case "PA":
                return "Pennsylvania";

            case "PR":
                return "Puerto Rico";

            case "RI":
                return "Rhode Island";

            case "SC":
                return "South Carolina";

            case "SD":
                return "South Dakota";

            case "TN":
                return "Tennessee";

            case "TX":
                return "Texas";

            case "UT":
                return "Utah";

            case "VT":
                return "Vermont";

            case "VI":
                return "Virgin Islands";

            case "VA":
                return "Virginia";

            case "WA":
                return "Washington";

            case "WV":
                return "West Virginia";

            case "WI":
                return "Wisconsin";

            case "WY":
                return "Wyoming";
        }

Answer 3

再次添加到Homam的答案,我只需要一个文本翻译,所以我拿出了枚举:

public string GetStateByName(string name)
{
    switch (name.ToUpper())
    {
        case "ALABAMA":
            return "AL";

        case "ALASKA":
            return "AK";

        case "AMERICAN SAMOA":
            return "AS";

        case "ARIZONA":
            return "AZ";

        case "ARKANSAS":
            return "AR";

        case "CALIFORNIA":
            return "CA";

        case "COLORADO":
            return "CO";

        case "CONNECTICUT":
            return "CT";

        case "DELAWARE":
            return "DE";

        case "DISTRICT OF COLUMBIA":
            return "DC";

        case "FEDERATED STATES OF MICRONESIA":
            return "FM";

        case "FLORIDA":
            return "FL";

        case "GEORGIA":
            return "GA";

        case "GUAM":
            return "GU";

        case "HAWAII":
            return "HI";

        case "IDAHO":
            return "ID";

        case "ILLINOIS":
            return "IL";

        case "INDIANA":
            return "IN";

        case "IOWA":
            return "IA";

        case "KANSAS":
            return "KS";

        case "KENTUCKY":
            return "KY";

        case "LOUISIANA":
            return "LA";

        case "MAINE":
            return "ME";

        case "MARSHALL ISLANDS":
            return "MH";

        case "MARYLAND":
            return "MD";

        case "MASSACHUSETTS":
            return "MA";

        case "MICHIGAN":
            return "MI";

        case "MINNESOTA":
            return "MN";

        case "MISSISSIPPI":
            return "MS";

        case "MISSOURI":
            return "MO";

        case "MONTANA":
            return "MT";

        case "NEBRASKA":
            return "NE";

        case "NEVADA":
            return "NV";

        case "NEW HAMPSHIRE":
            return "NH";

        case "NEW JERSEY":
            return "NJ";

        case "NEW MEXICO":
            return "NM";

        case "NEW YORK":
            return "NY";

        case "NORTH CAROLINA":
            return "NC";

        case "NORTH DAKOTA":
            return "ND";

        case "NORTHERN MARIANA ISLANDS":
            return "MP";

        case "OHIO":
            return "OH";

        case "OKLAHOMA":
            return "OK";

        case "OREGON":
            return "OR";

        case "PALAU":
            return "PW";

        case "PENNSYLVANIA":
            return "PA";

        case "PUERTO RICO":
            return "PR";

        case "RHODE ISLAND":
            return "RI";

        case "SOUTH CAROLINA":
            return "SC";

        case "SOUTH DAKOTA":
            return "SD";

        case "TENNESSEE":
            return "TN";

        case "TEXAS":
            return "TX";

        case "UTAH":
            return "UT";

        case "VERMONT":
            return "VT";

        case "VIRGIN ISLANDS":
            return "VI";

        case "VIRGINIA":
            return "VA";

        case "WASHINGTON":
            return "WA";

        case "WEST VIRGINIA":
            return "WV";

        case "WISCONSIN":
            return "WI";

        case "WYOMING":
            return "WY";
    }

    throw new Exception("Not Available");
}

Answer 4

您应该使用Dictionary<String, String>带StringComparer.OrdinalIgnoreCase.

Answer 5

下面是一个经过测试的 C# 函数，它采用美国州缩写并返回完整的州名称。它使用比 switch 更紧凑的字典方法。要回答您的问题，您只需交换键和值即可。

https://heuristically.wordpress.com/2011/04/19/csharp-dictionary-us-state-abbreivation-names-using-sas/

public string stateAbbreviationExpand(string abbr)
{
    Dictionary<string, string> states = new Dictionary<string, string>();

    states.Add("AL", "Alabama");
    states.Add("AK", "Alaska");
    states.Add("AZ", "Arizona");
    states.Add("AR", "Arkansas");
    states.Add("CA", "California");
    states.Add("CO", "Colorado");
    states.Add("CT", "Connecticut");
    states.Add("DE", "Delaware");
    states.Add("DC", "District of Columbia");
    states.Add("FL", "Florida");
    states.Add("GA", "Georgia");
    states.Add("HI", "Hawaii");
    states.Add("ID", "Idaho");
    states.Add("IL", "Illinois");
    states.Add("IN", "Indiana");
    states.Add("IA", "Iowa");
    states.Add("KS", "Kansas");
    states.Add("KY", "Kentucky");
    states.Add("LA", "Louisiana");
    states.Add("ME", "Maine");
    states.Add("MD", "Maryland");
    states.Add("MA", "Massachusetts");
    states.Add("MI", "Michigan");
    states.Add("MN", "Minnesota");
    states.Add("MS", "Mississippi");
    states.Add("MO", "Missouri");
    states.Add("MT", "Montana");
    states.Add("NE", "Nebraska");
    states.Add("NV", "Nevada");
    states.Add("NH", "New Hampshire");
    states.Add("NJ", "New Jersey");
    states.Add("NM", "New Mexico");
    states.Add("NY", "New York");
    states.Add("NC", "North Carolina");
    states.Add("ND", "North Dakota");
    states.Add("OH", "Ohio");
    states.Add("OK", "Oklahoma");
    states.Add("OR", "Oregon");
    states.Add("PA", "Pennsylvania");
    states.Add("RI", "Rhode Island");
    states.Add("SC", "South Carolina");
    states.Add("SD", "South Dakota");
    states.Add("TN", "Tennessee");
    states.Add("TX", "Texas");
    states.Add("UT", "Utah");
    states.Add("VT", "Vermont");
    states.Add("VA", "Virginia");
    states.Add("WA", "Washington");
    states.Add("WV", "West Virginia");
    states.Add("WI", "Wisconsin");
    states.Add("WY", "Wyoming");
    if (states.ContainsKey(abbr))
        return (states[abbr]);
    /* error handler is to return an empty string rather than throwing an exception */
    return "";      
}

Answer 6

这里提供的解决方案没有错,但我想建议另一个选项,在我看来,它有点好一点.您可以定义以下Enum扩展方法,该方法使用reflection和Description属性来获取完整的州名:

namespace System
{
    public static class EnumExtensions
    {
        public static string GetDescription(this Enum value)
        {
            var fi = value.GetType().GetField(value.ToString());
            var attributes = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
            return (attributes.Length > 0) ? attributes[0].Description : value.ToString();
        }
    }
}

基本上这将允许您执行以下操作:

var stateName = State.AL.GetDescription();

现在您只需要使用Description属性修饰枚举器值:

public enum State
{
   [Description("Alabama")
   AL,
   [Description("Alaska")
   AK
}

扩展方法将为您提供状态的全名.如果未定义描述,它将为您提供Enum值名称,例如对于阿拉斯加,它将是AK.

这样,您只需一段代码即可为任何枚举器提取描述值,而不仅仅是状态.您需要做的就是定义Enum值的描述,这些值需要更具描述性,扩展将完成其余的工作.

注意:扩展必须放在System命名空间中,以便开箱即用,而不必引用它的命名空间.

Answer 7

if statename.tolower == "new york" then 
  statename = "NY"
else if

所以如果你打算走这条路我会：

1. 使用switch语句而不是 if else switch(state.ToLower())。这将比 if then 语句更有效。编译器会优化 switch 语句。

2. 如果绝对必须使用 if then 语句。做

   字符串 lowerCaseState = state.ToLower()。
   if(lowerCaseState == "纽约"){....}否则如果...

这样，您就可以创建一个小写字符串一次（字符串是不可变的），而不是 if then 语句的每个部分。

事实上，我可能会使用带有静态方法的 switch 语句。

1. 州名不会改变
2. 州缩写不会改变。

您可以创建一个对象来存储值，以便在每次程序运行时加载它们，但为什么呢？您不妨让编译器优化对不变静态值的访问。