示例#1
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        } //CanConvertFrom

        /// <summary>
        /// Performs the conversion from string to a HtmlFontProperty (only)
        /// </summary>
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (value is string)
            {
                // define a new font property
                string           fontString = (string)value;
                HtmlFontProperty font       = new HtmlFontProperty(string.Empty);;
                try
                {
                    // parse the contents of the given string using a regex
                    string fontName   = string.Empty;
                    string fontSize   = string.Empty;
                    Regex  expression = new Regex(FONT_PARSE_EXPRESSION, RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.ExplicitCapture);
                    Match  match      = expression.Match(fontString);
                    // see if a match was found
                    if (match.Success)
                    {
                        // extract the content type elements
                        fontName = match.Result(FONT_PARSE_NAME);
                        fontSize = match.Result(FONT_PARSE_SIZE);
                        // set the fontname
                        TextInfo text = Thread.CurrentThread.CurrentCulture.TextInfo;
                        font.Name = text.ToTitleCase(fontName);
                        // determine size from given string using Small if blank
                        if (fontSize == string.Empty)
                        {
                            fontSize = "Small";
                        }
                        font.Size = (HtmlFontSize)Enum.Parse(typeof(HtmlFontSize), fontSize, true);
                    }
                }
                catch (Exception)
                {
                    // do nothing but ensure font is a null font
                    font.Name = string.Empty;
                }
                if (HtmlFontProperty.IsNull(font))
                {
                    // error performing the string conversion so throw exception given possible format
                    string error = string.Format(@"Cannot convert '{0}' to Type HtmlFontProperty. Format: 'FontName, HtmlSize', Font Size values: {1}", fontString, string.Join(", ", Enum.GetNames(typeof(HtmlFontSize))));
                    throw new ArgumentException(error);
                }
                else
                {
                    // return the font
                    return(font);
                }
            }
            else
            {
                return(base.ConvertFrom(context, culture, value));
            }
        } //ConvertFrom
示例#2
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        } //CanConvertTo

        /// <summary>
        /// Performs the conversion from HtmlFontProperty to a string (only)
        /// </summary>
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            // ensure working with the intented type HtmlFontProperty
            if (value is HtmlFontProperty)
            {
                HtmlFontProperty font = (HtmlFontProperty)value;
                if (destinationType == typeof(string))
                {
                    return(font.ToString());
                }
                if (destinationType == typeof(InstanceDescriptor))
                {
                    // define array to hold the properties and values
                    Object[] properties = new Object[8];
                    Type[]   types      = new Type[8];
                    // Name property
                    properties[0] = font.Name;
                    types[0]      = typeof(string);
                    // Size property
                    properties[1] = font.Size;
                    types[1]      = typeof(HtmlFontSize);
                    // Bold property
                    properties[2] = font.Bold;
                    types[2]      = typeof(bool);
                    // Italic property
                    properties[3] = font.Italic;
                    types[3]      = typeof(bool);
                    // Underline property
                    properties[4] = font.Underline;
                    types[4]      = typeof(bool);
                    // Strikeout property
                    properties[5] = font.Strikeout;
                    types[5]      = typeof(bool);
                    // Subscript property
                    properties[6] = font.Subscript;
                    types[6]      = typeof(bool);
                    // Superscript property
                    properties[7] = font.Superscript;
                    types[7]      = typeof(bool);
                    // create the instance constructor to return
                    ConstructorInfo ci = typeof(HtmlFontProperty).GetConstructor(types);
                    return(new InstanceDescriptor(ci, properties));
                }
            }

            // have something other than InstanceDescriptor or sting
            return(base.ConvertTo(context, culture, value, destinationType));
        } //ConvertTo
示例#3
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        } //ToString

        /// <summary>
        /// Compares two Html Fonts for equality
        /// Equality opertors not defined (Design Time issue with override of Equals)
        /// </summary>
        public static bool IsEqual(HtmlFontProperty font1, HtmlFontProperty font2)
        {
            // assume not equal
            bool equals = false;

            // perform the comparsion
            if (HtmlFontProperty.IsNotNull(font1) && HtmlFontProperty.IsNotNull(font2))
            {
                if (font1.Name == font2.Name &&
                    font1.Size == font2.Size &&
                    font1.Bold == font2.Bold &&
                    font1.Italic == font2.Italic &&
                    font1.Underline == font2.Underline &&
                    font1.Strikeout == font2.Strikeout &&
                    font1.Subscript == font2.Subscript &&
                    font1.Superscript == font2.Superscript)
                {
                    equals = true;
                }
            }

            // return the calculated value
            return(equals);
        } //IsEquals
示例#4
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        } //IsNull

        /// <summary>
        /// Based on a font name being null the font can be assumed to be null
        /// Default constructor will give a null object
        /// </summary>
        public static bool IsNotNull(HtmlFontProperty font)
        {
            return(!HtmlFontProperty.IsNull(font));
        } //IsNull
示例#5
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        } //IsNotEqual

        /// <summary>
        /// Based on a font name being null the font can be assumed to be null
        /// Default constructor will give a null object
        /// </summary>
        public static bool IsNull(HtmlFontProperty font)
        {
            return(font.Name == null || font.Name.Trim() == string.Empty);
        } //IsNull
示例#6
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        } //IsEquals

        /// <summary>
        /// Compares two Html Fonts for equality
        /// Equality opertors not defined (Design Time issue with override of Equals)
        /// </summary>
        public static bool IsNotEqual(HtmlFontProperty font1, HtmlFontProperty font2)
        {
            return(!HtmlFontProperty.IsEqual(font1, font2));
        } //IsNotEqual