C#通用类型转换 Convert.ChangeType

//转换对象的成任何类型
//通用型
//效率不见得有多高
//当做特殊情况处理或者练习的话可以


public static object ChangeType(object value, Type type)
{
    if (value == null && type.IsGenericType) return Activator.CreateInstance(type);
    if (value == null) return null;
    if (type == value.GetType()) return value;
    if (type.IsEnum)
    {
        if (value is string)
            return Enum.Parse(type, value as string);
        else
            return Enum.ToObject(type, value);
    }
    if (!type.IsInterface && type.IsGenericType)
    {
        Type innerType = type.GetGenericArguments()[0];
        object innerValue = ChangeType(value, innerType);
        return Activator.CreateInstance(type, new object[] { innerValue });
    }
    if (value is string && type == typeof(Guid)) return new Guid(value as string);
    if (value is string && type == typeof(Version)) return new Version(value as string);
    if (!(value is IConvertible)) return value;
    return Convert.ChangeType(value, type);
} 




//转载自  http://www.cnblogs.com/youring2/archive/2012/07/26/2610035.html