WebApi deserialize JSON array of objects with dynamic parameter names

Question

I have a JSON object with this structure:

{
    "customLineItemParameters": [
    {"paramName1": "value1"}, 
    {"paramName2": "value2"}, 
    {"paramName3": "value3"}
    ]
}

My model property looks like this:

List<Tuple<string, string>> CustomLineItemParameters { get; set; }

When trying to deserialise the JSON object, I get a list of three tuples, but the tuple values are empty:

[0] -> {(, )}
[1] -> {(, )}
[2] -> {(, )}

How should my model look in order to properly deserialize the json? (I can't change the json structure).

Try List<KeyValuePair<string, string>> orDictionary<string,string> — Developer
– Developer, Commented Jan 25, 2017 at 16:16
@Developer same issue with KeyValuePair, already tried it. For Dictionary<string,string> the dictionary is null on deserialisation. — Alexander Pope
– Alexander Pope, Commented Jan 25, 2017 at 16:20
Yeah my bad. For Dictionary, the it should be json object not array. And for KeyValuePair, I think the key and value properties are required, notbsure though — Developer
– Developer, Commented Jan 25, 2017 at 16:52

jorgonor · Accepted Answer · 2017-01-25 16:20:39Z

1

List<Dictionary<string, string>> CustomLineItemParameters { get; set; }

answered Jan 25, 2017 at 16:20

jorgonor

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2 Comments

Alexander Pope Over a year ago

That worked, thanks! Do you know why Tuple<string, string> or KeyValuePair<string, string> don't work?

jorgonor Over a year ago

Tuples are just regular objects. The default JSON serializer would inflate values in their Item1 and Item2 properties if the incoming object had them. The same applies to KeyValuePair. The Dictionary object is an exception. I think it implements an interface but I can't tell you for sure.

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