Method ConvertFrom

TexturedFontEditor/Helper.cs:262–285

(ITypeDescriptorContext context, CultureInfo culture, object value)

            return ((destinationType == typeof(RectangleF)) || base.CanConvertTo(context, destinationType));
        }
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (culture == null)
                culture = CultureInfo.CurrentCulture;

            if (!(value is string))
                return base.ConvertFrom(context, culture, value);

            string text = ((string)value).Trim();
            if (text.Length == 0)
                return null;

            char ch = culture.TextInfo.ListSeparator[0];
            string[] textArray = text.Split(new char[] { ch });
            float[] numArray = new float[textArray.Length];
            if (numArray.Length != 4)
                throw new ArgumentException("格式不正确");

            TypeConverter converter = TypeDescriptor.GetConverter(typeof(float));
            for (int i = 0; i < numArray.Length; i++)
                numArray[i] = (float)converter.ConvertFromString(context, culture, textArray[i]);

            return new RectangleF(numArray[0], numArray[1], numArray[2], numArray[3]);
        }
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (culture == null)