原文地址:https://www.cnblogs.com/willingtolove/p/12198871.html
#通過反射獲取對象屬性值並設置屬性值
0、定義一個類
1、通過屬性名(字符串)獲取對象屬性值
2、通過屬性名(字符串)設置對象屬性值
#獲取對象的所有屬性名稱及類型
#判斷對象是否包含某個屬性
#通過反射獲取對象屬性值並設置屬性值
0、定義一個類
public class User { public int Id { get; set; } public string Name { get; set; } public string Age { get; set; } }
1、通過屬性名(字符串)獲取對象屬性值
User u = new User(); u.Name = "lily"; var propName = "Name"; var propNameVal = u.GetType().GetProperty(propName).GetValue(u, null); Console.WriteLine(propNameVal);// "lily"
2、通過屬性名(字符串)設置對象屬性值
User u = new User(); u.Name = "lily"; var propName = "Name"; var newVal = "MeiMei"; u.GetType().GetProperty(propName).SetValue(u, newVal); Console.WriteLine(propNameVal);// "MeiMei"
#獲取對象的所有屬性名稱及類型
通過類的對象實現
User u = new User(); foreach (var item in u.GetType().GetProperties()) { Console.WriteLine($"propName:{item.Name},propType:{item.PropertyType.Name}"); } // propName: Id,propType: Int32 // propName:Name,propType: String // propName:Age,propType: String
通過類實現
foreach (var item in typeof(User).GetProperties()) { Console.WriteLine($"propName:{item.Name},propType:{item.PropertyType.Name}"); } // propName: Id,propType: Int32 // propName:Name,propType: String // propName:Age,propType: String
#判斷對象是否包含某個屬性
static void Main(string[] args) { User u = new User(); bool isContain= ContainProperty(u,"Name");// true } public static bool ContainProperty( object instance, string propertyName) { if (instance != null && !string.IsNullOrEmpty(propertyName)) { PropertyInfo _findedPropertyInfo = instance.GetType().GetProperty(propertyName); return (_findedPropertyInfo != null); } return false; }
將其封裝為擴展方法
public static class ExtendLibrary { /// <summary> /// 利用反射來判斷對象是否包含某個屬性 /// </summary> /// <param name="instance">object</param> /// <param name="propertyName">需要判斷的屬性</param> /// <returns>是否包含</returns> public static bool ContainProperty(this object instance, string propertyName) { if (instance != null && !string.IsNullOrEmpty(propertyName)) { PropertyInfo _findedPropertyInfo = instance.GetType().GetProperty(propertyName); return (_findedPropertyInfo != null); } return false; } } static void Main(string[] args) { User u = new User(); bool isContain= u.ContainProperty("Name");// true }