CODEWITHSUNDEEP
c#
Иван Иванов
Иван Иванов

Reputation: 133

C# dynamic ExpandoObject Array

please tell me, how do I get the json like this:

    dynamic packet = new ExpandoObject();
    packet.type = "somethink";
    packet.user = 12345;

    packet.nets[0].amout = 123;
    packet.nets[0].lower = 0;
    packet.nets[1].amout = 345;
    packet.nets[1].lower = 1;
    string input = Newtonsoft.Json.JsonConvert.SerializeObject(packet);

Its not workig, error: An unhandled exception of type "Microsoft.CSharp.RuntimeBinder.RuntimeBinderException" in System.Core.dll

For more information: "System.Dynamic.ExpandoObject" does not contain definitions of "nets"

Thanks.

Upvotes: 6

Views: 11483

Answers (3)

Matías Fidemraizer
Matías Fidemraizer

Reputation: 64923

It's the ExpandoObject who's a dynamic object. The rest of properties should be other ExpandoObject instances or regular objects, arrays, collections...

For example: 

packet.nets = new[] 
{
     new { amount = 123, lower = 0 },
     new { amount = 345, lower = 1 }
}

Or:

packet.nets = new[]
{
     new Dictionary<string, int> { { "amount", 345 }, { "lower", 0 } },
     new Dictionary<string, int> { { "amount", 123 }, { "lower", 1 } }
}

There're many other approaches, including the use of instances of concrete classes.

Upvotes: 13

Arturo Menchaca
Arturo Menchaca

Reputation: 15982

Firstly, you need create nets in packet object, like this:

packet.nets = new dynamic[2];

And initialize the objects in nets, if you want with `ExpandoObject too:

packet.nets[0] = new ExpandoObject();
packet.nets[1] = new ExpandoObject();

Then is done, complete code:

dynamic packet = new ExpandoObject();
packet.type = "somethink";
packet.user = 12345;

packet.nets = new dynamic[2];

packet.nets[0] = new ExpandoObject();
packet.nets[0].amout = 123;
packet.nets[0].lower = 0;

packet.nets[1] = new ExpandoObject();
packet.nets[1].amout = 345;
packet.nets[1].lower = 1;            

string input = Newtonsoft.Json.JsonConvert.SerializeObject(packet);

Upvotes: 4

Yuriy Faktorovich
Yuriy Faktorovich

Reputation: 68687

You first need to declare nets. For example

packet.nets = new Dictionary<int, dynamic>();

Then you'll need to instantiate the instances of nets

packet.nets[0] = new {amount = 123, lower = 0};

The result being

dynamic packet = new ExpandoObject();
packet.type = "somethink";
packet.user = 12345;

packet.nets = new Dictionary<int, dynamic>();
packet.nets[0] = new { amount = 123, lower = 0 };
packet.nets[1] = new { amount = 345, lower = 1 };

Upvotes: 1

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