Font序列化和反序列化

时间：2011-04-08 来源：wanghui

Font中的Properties都是readonly，并且Font不能被继承，所以序列化和反序列化Font会相对麻烦一点。

需要写一个FontSerializer类来实现Font序列化和反序列化。先写测试代码：

        [TestMethod()]
        public void FontSerializationTest()
        {
            const string _anyFileName = @"D:/FontSerializerTest.xml";

            XmlTextWriter writer = new XmlTextWriter(_anyFileName, null);
            writer.Formatting = Formatting.Indented;
            string name = "Font";
            Font font = new Font("Arial", 9, FontStyle.Bold | FontStyle.Italic | FontStyle.Strikeout | FontStyle.Underline);;
            FontSerializer.WriteXml(writer, name, font);
            writer.Close();
            font.Dispose();

            XmlTextReader reader = new XmlTextReader(_anyFileName);
            font = FontSerializer.ReadXml(reader, name);
            reader.Close();
            Assert.AreEqual(font.Name, _anyFont.Name);
            Assert.AreEqual(font.Size, _anyFont.Size);
            Assert.AreEqual(font.Style, _anyFont.Style);
            font.Dispose();
        }

再写实现代码。

using System.Drawing;
using System.Globalization;
using System.Xml;

namespace CommonLib
{
    public static class FontSerializer
    {
        #region Methods

        public static Font ReadXml(XmlReader reader, string name)
        {
            reader.ReadToFollowing(name);
            reader.ReadStartElement();
            string familyName = reader.ReadElementString("Name");
            float size = float.Parse(reader.ReadElementString("Size"), CultureInfo.InvariantCulture);
            bool bold = bool.Parse(reader.ReadElementString("Bold"));
            bool italic = bool.Parse(reader.ReadElementString("Italic"));
            bool strikeout = bool.Parse(reader.ReadElementString("Strikeout"));
            bool underline = bool.Parse(reader.ReadElementString("Underline"));
            reader.ReadEndElement();

            FontStyle fontStyle = FontStyle.Regular;
            if (bold) fontStyle |= FontStyle.Bold;
            if (italic) fontStyle |= FontStyle.Italic;
            if (strikeout) fontStyle |= FontStyle.Strikeout;
            if (underline) fontStyle |= FontStyle.Underline;
            Font font = new Font(familyName, size, fontStyle); 
            return font;
        }

        public static void WriteXml(XmlWriter writer, string name, Font font)
        {
            writer.WriteStartElement(name);
            writer.WriteElementString("Name", font.Name);
            writer.WriteElementString("Size", font.Size.ToString(CultureInfo.InvariantCulture));
            writer.WriteElementString("Bold", font.Bold.ToString());
            writer.WriteElementString("Italic", font.Italic.ToString());
            writer.WriteElementString("Strikeout", font.Strikeout.ToString());
            writer.WriteElementString("Underline ", font.Underline.ToString());
            writer.WriteEndElement();
        }

        #endregion
    }
}

见人用过Stream和BinaryFormatter序列化和反序列化Font，但不能在XML文件中任意节点序列化Font。以上实现可以解决这个问题。