将值添加到对象类型c＃

Question

I've have object like this:

object rt = new {
    page = 1,
};

Now how could I add new values to this object? I mean something like this:

rt += { code = 5 };

How it could be possible?

Answer 1

It sounds more like you want a Dictionary<string,int>

var rt =  new Dictinary<string,int>(){
    {"page",1}
};

rt.Add("code",5);

You can also do it with System.Dynamic.ExpandoObject - but this is just a fancy wrapper around a dictionary.

dynamic rt = new ExpandoObject();
rt.page = 1;
rt.code = 5;

Console.WriteLine(rt.page);

Answer 2

Use ExpandoObject

 dynamic rt = new ExpandoObject();
 rt.page = 1;
 rt.code = 5;

Answer 3

The actual question is: why do you need this at all? Imagine your object was a named one, eg like this:

var m = new MyClass { MyProperty = ... };

with

class MyClass
{
    public string MyProperty;
}

What you want to do is, to add a further property to that class at runtime, which isn´t possible. You can´t do the following:

m.AnotherProperty = ...

as AnotherProperty isn´t defined on that type.

Even declaring m as dynamic wouldn´t help you, as the actual type ( MyClass ) doesn´t know anything of AnotherProperty .

dynamic a = new MyClass { MyProperty = ... };
a.AnotherProperty = ...;

So the simple answer to your question is: no, you can´t add members to a class at runtime.