使用PropertyInfo类得到对象属性及值-

使用PropertyInfo类得到对象属性及值publicclassPeople{publicstringname{get;set;}publicintage{get;set;}publicDateTimebirthday{get;set;}publicboolisActive{get;set;}p…

对一个对象进行属性分析，并得到相应的属性值，并判断属性的默认值以及空值

   public class People   {       public string name { get; set; }       public int age { get; set; }       public DateTime birthday { get; set; }       public bool isActive { get; set; }       public List<Address> address{    get;set;}   }   public class Address   {       public string country { get; set; }       public string province { get; set; }       public string city { get; set; }   }   class Program   {              static void Main(string[] args)       {           List<Address> address = new List<Address>()           {               new Address(){                   country="china",                   province="anHui",                   city="bengBu",               },               new Address(){                   country="china",                   city="shangHai",               },           };           People people = new People()           {               name="wangqilong",               age=23,               birthday=Convert.ToDateTime("2018-09-15"),               isActive=true,               address=address           };           string str = method(people);       }       public static string method(Object obj)       {           string str = "";           Type postType = obj.GetType();           PropertyInfo[] postTypeInfos = postType.GetProperties(); //返回为当前 Type 的所有公共属性,PropertyInfo[] PropertyInfo 的所有公共属性的 Type 对象数组           foreach (PropertyInfo p in postTypeInfos)                  {               if (p.PropertyType.FullName == typeof(DateTime).FullName)               {                   DateTime pValue = (DateTime)p.GetValue(obj, null);                   if (pValue != null && pValue != DateTime.MinValue)    //dateTime类型申明时默认值为最小值                   {                       str += p.Name + ":" + pValue + ";";                   }               }               else if (p.PropertyType.FullName == typeof(Int32).FullName)               {                   int pValue = (int)p.GetValue(obj, null);                   if (pValue != 0)                                //int类型申明时默认值为最小值0                   {                       str += p.Name + ":" + pValue + ";";                   }               }               else if (p.PropertyType.FullName == typeof(Boolean).FullName)               {                   Object pValue = p.GetValue(obj, null);                   str += p.Name + ":" + pValue + ";";               }               else if (p.PropertyType.FullName == typeof(String).FullName)               {                   Object pValue = p.GetValue(obj, null);                   str += p.Name + ":" + pValue + ";";               }               //如果传入的对象包含集合，集合中是另个对象               else if (p.PropertyType.FullName == typeof(List<Address>).FullName)               {                   List<Address> list = (List<Address>)p.GetValue(obj, null);                   if (list != null)                   {                       foreach (Address address in list)                       {                           str += p.Name + ":" + address.country+","+address.province+","+address.city + ";";                       }                   }               }           }           return str;       }   }

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结果：”name:wangqilong;age:23;birthday:2018/9/15 0:00:00;isActive:True;address:china,anHui,bengBu;address:china,,shangHai;”

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关于PropertyInfo类信息: https://docs.microsoft.com/zh-cn/dotnet/api/system.reflection.propertyinfo?view=netframework-1.1