C# (CSharp) EscapeLanguage 예제들

예제 #1

        public static string Escape(this string str, EscapeLanguage language)
        {
            var sb = new StringBuilder(str.Length);

            if (language == EscapeLanguage.Xml)
            {
                foreach (char cb in str)
                {
                    switch (cb)
                    {
                    case '"':
                        sb.Append(""");
                        break;

                    case '\'':
                        sb.Append("'");
                        break;

                    case '<':
                        sb.Append("&lt;");
                        break;

                    case '>':
                        sb.Append("&gt;");
                        break;

                    case '&':
                        sb.Append("&amp;");
                        break;

                    case '\r':
                        sb.Append("&#13;");
                        break;

                    case '\n':
                        sb.Append("&#10;");
                        break;

                    case '\t':
                        sb.Append("&#9;");
                        break;

                    case '|':
                        sb.Append("&#124;");
                        break;

                    case '/':
                        sb.Append("&#x2f;");
                        break;

                    default:
                        sb.Append(cb);
                        break;
                    }
                }
            }

            return(sb.ToString());
        }

예제 #2

        public static string Unescape(this string str, EscapeLanguage language)
        {
            var sb = new StringBuilder(str.Length);

            if (language == EscapeLanguage.Xml)
            {
                for (int i = 0; i < str.Length;)
                {
                    if (str[i] == '&')
                    {
                        if (++i >= str.Length)
                        {
                            throw new Exception("Invalid XmlString");
                        }

                        // find ;
                        int endIndex = str.IndexOf(';', i);
                        if (endIndex == -1 ||
                            endIndex - i == 0) // same as &;
                        {
                            throw new Exception("Invalid XmlString");
                        }

                        var stringAttribute = str.Substring(i, endIndex - i);

                        if (stringAttribute[0] == '#')
                        {
                            if (stringAttribute.Length < 2 ||                                            // &#1;
                                (char.ToLower(stringAttribute[1]) == 'x' && stringAttribute.Length < 3)) // &#x1;
                            {
                                throw new Exception("Invalid XmlString");
                            }

                            if (char.ToLower(stringAttribute[1]) == 'x')
                            {
                                var hex = stringAttribute.Substring(2).PadLeft(4, '0');
                                var val = (char)short.Parse(hex, NumberStyles.HexNumber);
                                sb.Append(val);
                            }
                            else
                            {
                                // number
                                var val = (char)short.Parse(stringAttribute.Substring(1));
                                sb.Append(val);
                            }
                        }
                        else
                        {
                            switch (stringAttribute.ToLower())
                            {
                            case "quot":
                                sb.Append('"');
                                break;

                            case "apos":
                                sb.Append('\'');
                                break;

                            case "lt":
                                sb.Append('<');
                                break;

                            case "gt":
                                sb.Append('>');
                                break;

                            case "amp":
                                sb.Append('&');
                                break;
                            }
                        }

                        // parse this attribute

                        i = endIndex + 1;
                        continue;
                    }

                    sb.Append(str[i++]);
                }
            }

            return(sb.ToString());
        }