/// <summary>
/// 将自定义类型转换为指定类型
/// </summary>
/// <param name="context">当前上下文信息</param>
/// <param name="culture">区域信息</param>
/// <param name="value">要转换的System.Object。</param>
/// <param name="destinationType">指定类型</param>
/// <returns></returns>
public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
{
//如果要转换为自定义类型
if (destinationType == typeof(string))
{
if (value is CurrentRating)
{
CurrentRating current = (CurrentRating)value;
return(string.Format("{0}({1})", current.Ib, current.Imax));
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
/// <summary>
/// 将指定类型转换为自定义类型
/// </summary>
/// <param name="context">当前上下文信息</param>
/// <param name="culture">区域信息</param>
/// <param name="value">指定类型</param>
/// <returns></returns>
public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
{
if (value is string)
{
string current = (string)value;
int leftBracketIndex = current.IndexOf('(');
int rightBracketIndex = current.IndexOf(')');
CurrentRating cu = new CurrentRating();
cu.Ib = Convert.ToDecimal(current.Substring(0, leftBracketIndex));
cu.Imax = Convert.ToDecimal(current.Substring(leftBracketIndex + 1, rightBracketIndex - leftBracketIndex - 1));
return(cu);
}
return(base.ConvertFrom(context, culture, value));
}