C# 擷取中文拼音的第一個字母

using System;<br />using System.Collections.Generic;<br />using System.Text;<br />namespace FirstLetterOfPinyin<br />{<br /> class Program<br /> {<br /> static void Main(string[] args)<br /> {<br /> TestWrite("紅豆");<br /> TestWrite("綠豆");<br /> TestWrite("惠普TX 1106", true);<br /> TestWrite("惠普TX 1106", false);<br /> Console.ReadKey();<br /> }<br /> static void TestWrite(String fChinese)<br /> {<br /> TestWrite(fChinese, false);<br /> }<br /> static void TestWrite(String fChinese, Boolean fReutrnEmptyWhenFailure)<br /> {<br /> Console.WriteLine(String.Format("{0}:{1}", fChinese<br /> , StringHelper.GetFirstLetterOfChinese(fChinese, fReutrnEmptyWhenFailure)));<br /> }<br /> }<br /> /// <summary><br /> /// 失敗時處理傳回值的方式<br /> public partial class StringHelper<br /> {<br /> #region " LetterItem "<br /> private class LetterItem<br /> {<br /> private String fLetter;<br /> private Int64 fMinValue;<br /> private Int64 fMaxValue;<br /> public String Letter { get { return fLetter; } }<br /> public Int64 MinValue { get { return fMinValue; } }<br /> public Int64 MaxValue { get { return fMaxValue; } }<br /> public LetterItem(String fLetter, Int64 fMinValue, Int64 fMaxValue)<br /> {<br /> this.fLetter = fLetter;<br /> this.fMinValue = fMinValue;<br /> this.fMaxValue = fMaxValue;<br /> }<br /> }<br /> #endregion<br /> private static List<LetterItem> dictionaryLetter;<br /> #region " Constructor "<br /> static StringHelper()<br /> {<br /> dictionaryLetter = new List<LetterItem>();<br /> // 沒有 U、V<br /> dictionaryLetter.Add(new LetterItem("A", 45217, 45252));<br /> dictionaryLetter.Add(new LetterItem("B", 45253, 45760));<br /> dictionaryLetter.Add(new LetterItem("C", 45761, 46317));<br /> dictionaryLetter.Add(new LetterItem("D", 46318, 46825));<br /> dictionaryLetter.Add(new LetterItem("E", 46826, 47009));<br /> dictionaryLetter.Add(new LetterItem("F", 47010, 47296));<br /> dictionaryLetter.Add(new LetterItem("G", 47297, 47613));<br /> dictionaryLetter.Add(new LetterItem("H", 47614, 48118));<br /> dictionaryLetter.Add(new LetterItem("J", 48119, 49061));<br /> dictionaryLetter.Add(new LetterItem("K", 49062, 49323));<br /> dictionaryLetter.Add(new LetterItem("L", 49324, 49895));<br /> dictionaryLetter.Add(new LetterItem("M", 49896, 50370));<br /> dictionaryLetter.Add(new LetterItem("N", 50371, 50613));<br /> dictionaryLetter.Add(new LetterItem("O", 50614, 50621));<br /> dictionaryLetter.Add(new LetterItem("P", 50622, 50905));<br /> dictionaryLetter.Add(new LetterItem("Q", 50906, 51386));<br /> dictionaryLetter.Add(new LetterItem("R", 51387, 51445));<br /> dictionaryLetter.Add(new LetterItem("S", 51446, 52217));<br /> dictionaryLetter.Add(new LetterItem("T", 52218, 52697));<br /> dictionaryLetter.Add(new LetterItem("W", 52698, 52979));<br /> dictionaryLetter.Add(new LetterItem("X", 52980, 53640));<br /> dictionaryLetter.Add(new LetterItem("Y", 53689, 54480));<br /> dictionaryLetter.Add(new LetterItem("Z", 54481, 55289));<br /> }<br /> #endregion<br /> /// <summary><br /> /// 擷取一段中文中每個中文拼音的第一個字母<br /> /// </summary><br /> /// <param name="fInputChinese">需要擷取字母的中文</param><br /> /// <returns>中文拼音的第一個字母</returns><br /> public static string GetFirstLetterOfChinese(string fInputChinese)<br /> {<br /> return GetFirstLetterOfChinese(fInputChinese, false);<br /> }<br /> /// <summary><br /> /// 擷取一段中文中每個中文拼音的第一個字母<br /> /// </summary><br /> /// <param name="fInputChinese">需要擷取字母的中文</param><br /> /// <param name="fReutrnEmptyWhenFailure">當輸入不是中文時是否返回空值。True:返回空值；False：返回傳入參數的大寫</param><br /> /// <returns>中文拼音的第一個字母</returns><br /> public static string GetFirstLetterOfChinese(string fInputChinese, Boolean fReutrnEmptyWhenFailure)<br /> {<br /> string letters = "";</p><p> foreach (char c in fInputChinese.ToCharArray())<br /> letters += GetFirstLetterOfPinyin(c.ToString(), fReutrnEmptyWhenFailure);<br /> return letters;<br /> }<br /> /// <summary><br /> /// 擷取一個中文拼音的第一個字母。<br /> /// </summary><br /> /// <param name="fInputSingleChinese">需要擷取字母的一個中文</param><br /> /// <param name="fReutrnEmptyWhenFailure">當輸入不是中文時是否返回空值。True:返回空值；False：返回傳入參數的大寫</param><br /> /// <returns>中文拼音的第一個字母</returns><br /> private static string GetFirstLetterOfPinyin(String fInputSingleChinese, Boolean fReutrnEmptyWhenFailure)<br /> {<br /> byte[] byteArray = System.Text.Encoding.Default.GetBytes(fInputSingleChinese);<br /> //如果是字母，則直接返回<br /> if (byteArray.Length == 1)<br /> {<br /> return fReutrnEmptyWhenFailure<br /> ? fInputSingleChinese.ToUpper()<br /> : String.Empty;<br /> }<br /> // 擷取範圍<br /> short minValue = (short)(byteArray[0]);<br /> short maxValue = (short)(byteArray[1]);<br /> Int64 value = minValue * 256 + maxValue;<br /> foreach (LetterItem letterItem in dictionaryLetter)<br /> {<br /> if (value >= letterItem.MinValue &&<br /> value <= letterItem.MaxValue)<br /> return letterItem.Letter;<br /> }<br /> return "?"; // 未知<br /> }<br /> }<br />}<br />