c# 字符串中全角和半角字符互转

 public class ConvertDBCAndSBC
    {

        /// <summary>半角转成全角
        /// 半角空格32,全角空格12288
        /// 其他字符半角33~126,其他字符全角65281~65374,相差65248
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string DBCToSBC(string input)
        {
            char[] cc = input.ToCharArray();
            for (int i = ; i < cc.Length; i++)
            {
                if (cc[i] == )
                {
                    // 表示空格
                    cc[i] = (char);
                    continue;
                }
                if (cc[i] <  && cc[i] > )
                {
                    cc[i] = (char)(cc[i] + );
                }
            }
            return new string(cc);
        }

        /// <summary>全角转半角
        /// 半角空格32,全角空格12288
        /// 其他字符半角33~126,其他字符全角65281~65374,相差65248
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string SBCToDBC(string input)
        {
            char[] cc = input.ToCharArray();
            for (int i = ; i < cc.Length; i++)
            {
                if (cc[i] == )
                {
                    // 表示空格
                    cc[i] = (char);
                    continue;
                }
                if (cc[i] >  && cc[i] < )
                {
                    cc[i] = (char)(cc[i] - );
                }

            }
            return new string(cc);
        }
    }