c# - Set field's value in Inherited class from base -

i think easy, don't know how :)

class base1 {     public int x = 1; //... many other fields }  class inherit1:base1 {     int y = 5;   ... } base bs=new base1(); // set many fields value of bs class bs.value1=5; bs.value15="sss"; //....set other fileds values  inherit1 i1=new inherit1();  

what fastest way set fields value inherited class i1 equal base fields value bs?
want this:

i1=bs; 

and after init other field i1.

thank!

you can't assign base class intance derived type. need convert it.

so, first choise use automapper. helps copy data object type other. automatically map proprties same names. @ end use such code f.e:

var derived = mapper.map<base, derived>(b); 

, second choice write method , use reflection.

and use in constructor:

public class derived : base {     public derived(base b)       {         setproperties(b);     }      private void setproperties(object mainclassinstance)     {         var bindingflags = bindingflags.public | bindingflags.instance;         var mainclasstype = mainclassinstance.gettype();          memberinfo[] members = mainclasstype.getfields(bindingflags).cast<memberinfo>()             .concat(mainclasstype.getproperties(bindingflags)).toarray();          foreach (var memberinfo in members)         {             if (memberinfo.membertype == membertypes.property)             {                 var propertyinfo = memberinfo propertyinfo;                 object value = propertyinfo.getvalue(mainclassinstance, null);                  if (null != value)                     propertyinfo.setvalue(this, value, null);             }             else             {                 var fieldinfo = memberinfo fieldinfo;                 object value = fieldinfo.getvalue(mainclassinstance);                  if (null != value)                     fieldinfo.setvalue(this, value);             }         }     } } 

then need:

base b = new base {...}; derived d = new derived(b); 

additionally:

actually, better make setproperties method extension method.

public static class objectextensions {     public static void setproperties(this object newclassintance, object mainclassinstance)     {         var bindingflags = bindingflags.public | bindingflags.instance;         var mainclasstype = mainclassinstance.gettype();          memberinfo[] members = mainclasstype.getfields(bindingflags).cast<memberinfo>()             .concat(mainclasstype.getproperties(bindingflags)).toarray();          foreach (var memberinfo in members)         {             if (memberinfo.membertype == membertypes.property)             {                 var propertyinfo = memberinfo propertyinfo;                 object value = propertyinfo.getvalue(mainclassinstance, null);                  if (null != value)                     propertyinfo.setvalue(newclassintance, value, null);             }             else             {                 var fieldinfo = memberinfo fieldinfo;                 object value = fieldinfo.getvalue(mainclassinstance);                  if (null != value)                     fieldinfo.setvalue(newclassintance, value);             }         }     } } 

and, can use method as: this.setinheritedproperties(b);