class Student{public int StuId { get; set; }public string StuName { get; set; }}class Program{static void Main(string[] args){var person = new { Id = 18, Name = "bruce", DateOfBirth = new DateTime(1985,8,8), RandomNum = Guid.NewGuid() };TestGetPropertyValue(person);TestSetPropertyValue(new Student { StuId = 1, StuName = "Jacky" });}static void TestGetPropertyValue(object obj){Console.WriteLine("以下是从一个对象中获取的信息：\n");int id = obj.GetPropertyValue<int>("Id", 6);Console.WriteLine("获取成功，Id: " + id);int id2 = obj.GetPropertyValue<int>("Id2", 7);Console.WriteLine("获取失败，返回默认的 Id2: " + id2);string name = obj.GetPropertyValue<string>("Name", "default Name");Console.WriteLine("获取成功，Name: " + name);DateTime dateOfBirth = obj.GetPropertyValue<DateTime>("DateOfBirth", new DateTime(2000,1,1));Console.WriteLine("获取成功，DateOfBirth: " + dateOfBirth);Guid randomNum = obj.GetPropertyValue<Guid>("RandomNum", Guid.Empty);Console.WriteLine("获取成功，RandomNum: " + randomNum);Console.WriteLine("\n获取完毕！\n\n");}static void TestSetPropertyValue(object obj){string stuName = obj.GetPropertyValue<string>("StuName", "default StuName");Console.WriteLine("获取成功，StuName: " + stuName);obj.SetPropertyValue("StuName", "bruce liu");stuName = obj.GetPropertyValue<string>("StuName", "default bruce liu .");Console.WriteLine("动态设置后，StuName: " + stuName);Console.WriteLine("\n设置完毕！\n\n");}}public static class ObjectExtensions{/// <summary>/// 利用反射，动态获取一个 Property 的值（一般用于获得匿名类型的实例的值）/// </summary>/// <typeparam name="T">期望返回的类型</typeparam>/// <param name="obj">要获得的对象</param>/// <param name="propertyName">属性名称</param>/// <param name="defaultValue">默认值</param>/// <returns>是否成功，如果成功，则返回等效的值，否则返回默认值</returns>public static bool GetPropertyValue<T>(this object obj, string propertyName, out T returnValue){Type type = obj.GetType();PropertyInfo property = type.GetProperty(propertyName);if (property == null){returnValue = default(T);return false;}object value = property.GetValue(obj, null);if( value is T ){returnValue = (T)value;return true;}else{returnValue = default(T);return false;}}/// <summary>/// 利用反射，动态获取一个 Property 的值（一般用于获得匿名类型的实例的值）/// </summary>/// <typeparam name="T">期望返回的类型</typeparam>/// <param name="obj">要获得的对象</param>/// <param name="propertyName">属性名称</param>/// <param name="defaultValue">默认值</param>/// <returns>是否成功，如果成功，则返回等效的值，否则返回默认值</returns>public static T GetPropertyValue<T>(this object obj, string propertyName, T defaultValue){T returnValue;return GetPropertyValue<T>(obj, propertyName, out returnValue) ? returnValue : defaultValue;}/// <summary>/// 利用反射，动态设置一个 Property 的值（一般用于设置具有 public setter 类型的实例的值）/// </summary>/// <param name="obj">要设置的对象</param>/// <param name="propertyName">属性名称</param>/// <param name="value">要设置的值</param>public static void SetPropertyValue(this object obj, string propertyName, object value){Type type = obj.GetType();PropertyInfo property = type.GetProperty(propertyName);if (property != null){property.SetValue(obj, value, null);}}}