如何创建JObject的JArray？

Question

I'm trying to fill the object details with an array of JObject . The informations are available in the contactAddresses which is a AddressModel[] .

Whith the following code, I get the following error:

Newtonsoft.Json.JsonReaderException : After parsing a value an unexpected character was encountered

JArray addresses = new JArray();

foreach (AddressModel address in contactAddresses)
    {
        addresses.Add(JObject.Parse(
            @"{""street"":""" + address.Street +
            @"""city"":""" + address.City +
            @"""postalCode"":""" + address.PostalCode +
        @"""}"));
    }
    details.Add(new JProperty("addresses", addresses));

What am I doing wrong ?

Answer 1

You are missing the closing quotes around each data field, as well as the comma between them. You need something like;

addresses.Add(JObject.Parse(
            @"{""street"":""" + address.Street + "\", " +
            @"""city"":""" + address.City + "\", " + 
            @"""postalCode"":""" + address.PostalCode + 
        @"""}"));

Answer 2

Seems like your ultimate goal is to end up with some JSON that represents a list of addresses. I know you mentioned JObject and JArray, but you thought that implementation was ugly. Here's an alternative.

string json = JsonConvert.SerializeObject(contactAddresses);

The resulting json should look like this (once formatted):

[
    {"Street": "123 Mockingbird Lane", "City": "New York City", "PostalCode": "11111"},
    {"Street": "1600 Penn Ave", "City": "Washington DC", "PostalCode": "22222"},
    {"Street": "2400 University Dr", "City": "Fort Worth", "PostalCode": "33333"},
]

You can apply attributes to properties of the AddressModel class if you want the output to appear differently