C#类型转换

    public class TypeHelper
    {
        public static object ConvertTo(object obj, Type type)
        {
            try
            {
                return Convert.ChangeType(obj, type);
            }
            catch
            {
                return null;
            }
        }

        public static T ConvertTo<T>(object obj, T defalutValue)
        {
            var val = ConvertTo(obj, typeof(T));
            return val == null ? defalutValue : (T)val;
        }

        public static T ConvertTo<T>(object obj)
        {
            return ConvertTo(obj, default(T));
        }
    }