如何获取json字符串某些部分的值？

Question

I'm working with this Json structure, but I don't know how to get the values of the part of the "json" key

I'm using this code to send a request to an API, and the return is an Json object:

var reqData = (HttpWebRequest)WebRequest.Create(string.Format("http://server_ip/system/message/date/{0}/", txtDate.Text));
            reqData.ContentType = "application/json";
            reqData.Method = "GET";


var answer = (HttpWebResponse)reqData.GetResponse();
List<Dictionary<string, string>> convert = JsonConvert.DeserializeObject<List<Dictionary<string, string>>>(answer);

The result is a Json structure like this:

"[
  {
   \"idMessage\":\"--Message Id--",
   \"idTemplate\":--TemplateId--,
   \"mail\":\"--mail dir--\",
   \"subject\":\"--message subject--\",
    \"json\":\"{
                \\\"Id\\\":\\\"--Person Id--\\\",
                \\\"name\\\":\\\"--Person name--\\\",
                \\\"date\\":\\\"--Register date-\\\",
                \\\"hour\\\":\\\"--Register hour--\\\"
               }\",
    \"senddate\":\"--sent date--\",
    \"status\":0,
    \"template\":null
   }
  ]"

I want to get the values ( Id,name,date,hour ) from the json part of this Json string, can someone help me to get this values?

Answer 1

That json property contains a string of more JSON, so you have to deserialize that again, the same way you did the whole outer structure.

So now that you have your convert array, you can pull out the first object, grab the value of json and deserialize that:

var json = JsonConvert.DeserializeObject<Dictionary<string, string>>(convert[0]["json"]);

Then you can pull each value out like this:

var id = json["Id"];

Mind you, the JSON in your question isn't actually valid. There are a few errors in it. But I'm assuming that they're just copy/paste errors and the web service is actually returning valid JSON.