.net core汉字转拼音或拼音首字母

首先在项目中引入nuget包NPinyin.Core，然后新建静态转换类，即可在中畅用。

public static class PinYinCast
    {        
            private static Encoding gb2312 = Encoding.GetEncoding("GB2312");

            /// <summary>
            /// 汉字转大写全拼
            /// </summary>
            /// <param name="strChinese"></param>
            /// <returns></returns>
            public static string ConvertToAllSpell(string strChinese)
            {
                try
                {
                    if (strChinese.Length != 0)
                    {
                        StringBuilder fullSpell = new StringBuilder();
                        for (int i = 0; i < strChinese.Length; i++)
                        {
                            var chr = strChinese[i];
                            fullSpell.Append(GetSpell(chr));
                        }
                        return fullSpell.ToString().ToUpper();//转小写方法为 .ToLower()
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine("出错！" + e.Message);
                }
                return string.Empty;
            }

            /// <summary>
            /// 汉字转首字母大写
            /// </summary>
            /// <param name="strChinese"></param>
            /// <returns></returns>
            public static string GetFirstSpell(string strChinese)
            {
                try
                {
                    if (strChinese.Length != 0)
                    {
                        StringBuilder fullSpell = new StringBuilder();
                        for (int i = 0; i < strChinese.Length; i++)
                        {
                            var chr = strChinese[i];
                            fullSpell.Append(GetSpell(chr)[0]);
                        }
                        return fullSpell.ToString().ToUpper();//转小写方法为 .ToLower()
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine("出错！" + e.Message);
                }

                return string.Empty;
            }

            private static string GetSpell(char chr)
            {
                var coverchr = NPinyin.Pinyin.GetPinyin(chr);
                return coverchr;
            }
        }