How to set value for property of an anonymous object?

Question

this is my code for example:

var output = new
{
    NetSessionId = string.Empty
};

foreach (var property in output.GetType().GetProperties())
{
    property         


        

Answer 1

An easy way could be to serialize the anonymous object in a Json with NewtonSoft'JsonConverter (JsonConvert.SerializeObject(anonObject)). Then you can change the Json via string manipulation and reserialize it into a new anonymous object that you can assign to the old variable.

A little convolute but really easy to understand for beginners!

Answer 2

If you ever come across a situation where you need a mutable type, instead of messing around with the Anonymous type, you can just use the ExpandoObject:

Example:

var people = new List<Person>
{
    new Person { FirstName = "John", LastName = "Doe" },
    new Person { FirstName = "Jane", LastName = "Doe" },
    new Person { FirstName = "Bob", LastName = "Saget" },
    new Person { FirstName = "William", LastName = "Drag" },
    new Person { FirstName = "Richard", LastName = "Johnson" },
    new Person { FirstName = "Robert", LastName = "Frost" }
};

// Method syntax.
var query = people.Select(p =>
{
    dynamic exp = new ExpandoObject();
    exp.FirstName = p.FirstName;
    exp.LastName = p.LastName;
    return exp;
}); // or people.Select(p => GetExpandoObject(p))

// Query syntax.
var query2 = from p in people
             select GetExpandoObject(p);

foreach (dynamic person in query2) // query2 or query
{
    person.FirstName = "Changed";
    Console.WriteLine("{0} {1}", person.FirstName, person.LastName);
}

// Used with the query syntax in this example, but may also be used 
// with the method syntax just as easily.
private ExpandoObject GetExpandoObject(Person p)
{
    dynamic exp = new ExpandoObject();
    exp.FirstName = p.FirstName;
    exp.LastName = p.LastName;
    return exp;
}