/// <summary>
/// 在给定 Object 的一组属性值的情况下重新创建该对象
/// </summary>
/// <param name="context"></param>
/// <param name="propertyValues"></param>
/// <returns></returns>
public override object CreateInstance(ITypeDescriptorContext context, IDictionary propertyValues)
{
if (propertyValues == null)
{
throw new ArgumentNullException("NullParameter");
}
TypeXmlFont font = new TypeXmlFont();
font.FontFamily = propertyValues["FontFamily"].ToString();
font.Size = (float)propertyValues["Size"];
font.Style = (FontStyle)Enum.Parse(typeof(FontStyle), propertyValues["Style"].ToString());
return(font);
}
/// <summary>
/// 将给定值对象转换为指定的类型
/// </summary>
/// <param name="context"></param>
/// <param name="culture"></param>
/// <param name="value"></param>
/// <param name="destinationType"></param>
/// <returns></returns>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
TypeXmlFont font = value as TypeXmlFont;
if (font != null)
{
// 转成String
if ((destinationType == typeof(string)))
{
return(font.ToString());
}
}
// 基类的ConvertTo()必须调用
return(base.ConvertTo(context, culture, value, destinationType));
}
/// <summary>
/// 将给定值转换为此转换器的类型
/// </summary>
/// <param name="context"></param>
/// <param name="culture"></param>
/// <param name="value"></param>
/// <returns></returns>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
// 从String转换
string fontValue = (string)value;
if (fontValue != null)
{
try
{
TypeXmlFont newFont = new TypeXmlFont();
string[] fontParts = fontValue.Split(new char[] { ',' });
newFont.FontFamily = fontParts[0].Trim();
newFont.Size = (float)Convert.ToDouble(fontParts[1].Trim());
newFont.Style = (FontStyle)Enum.Parse(typeof(FontStyle), fontParts[2].Trim());
return(newFont);
}
catch
{
throw;
}
}
return(base.ConvertFrom(context, culture, value));
}
