JSON转换类（一）--过滤特殊字符，格式化字符型、日期型、布尔型

/// <summary>
        /// 过滤特殊字符
        /// </summary>
        private static string String2Json(String s)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.Length; i++)
            {
                char c = s.ToCharArray()[i];
                switch (c)
                {
                    case '"':
                        sb.Append("\""); break;
                    case '\':
                        sb.Append("\\"); break;
                    case '/':
                        sb.Append("\/"); break;
                    case '':
                        sb.Append("\b"); break;
                    case 'f':
                        sb.Append("\f"); break;
                    case '
':
                        sb.Append("\n"); break;
                    case '
':
                        sb.Append("\r"); break;
                    case '	':
                        sb.Append("\t"); break;
                    default:
                        sb.Append(c); break;
                }
            }
            return sb.ToString();
        }

/// <summary>
        /// 格式化字符型、日期型、布尔型
        /// </summary>
        private static string StringFormat(string str, Type type)
        {
            if (type == typeof(string))
            {
                str = String2Json(str);
                str = """ + str + """;
            }
            else if (type == typeof(DateTime))
            {
                str = """ + str + """;
            }
            else if (type == typeof(bool))
            {
                str = str.ToLower();
            }
            else if (type != typeof(string) && string.IsNullOrEmpty(str))
            {
                str = """ + str + """;
            }
            return str;
        }