How to get data value in string C#-CodePudding

I have an object like this. How can I parse the Name Surname from this object?

Object

{
    "HasError":false,
    "AlertType":"success",
    "AlertMessage":"Operation has completed successfully",
    "ModelErrors":[],
    "Data":{
        "Count":1,
        "Objects":
        [{
            "Id":291031530,
            "FirstName":"Alp",
            "LastName":"Uzan",
            "MiddleName":"",
            "Login":"alp"
        }]
    }
}

I'm getting this data to an external api using HttpClient but I can't parse it by values. Can you help with this, the type of data is System.String

CodePudding user response：

If you use c#, save output in string and serialize, usa this library

using Newtonsoft.Json;

JObject json = JObject.Parse(str);

string Name= json.Data.Objects[0].FirstName

string Surname = json.Data.Objects[0].Lastname

CodePudding user response：

You have a couple of options. The most type-safe way would be to define C# classes which represent the schema of your JSON content and then deserialise into an instance of those like so:

public class Data
{
    public int Count { get; set; }
    public List<DataObject> Objects { get; set; }
}

public class DataObject
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string MiddleName { get; set; }
    public string Login { get; set; }
}

public class  MyJSONObject
{
    public bool HasError { get; set; }
    public string AlertType { get; set; }
    public string AlertMessage { get; set; }
    public Data Data { get; set; }
}

...

//Deserialise
var json = "<snip>";
var deserialised = JsonSerializer.Deserialize<MyJSONObject>(json);

//Extract the info you want
 Console.WriteLine(deserialised.Data.Objects[0].LastName);

A second, more quick and dirty way to do it would be to parse the JSON into a JsonObject (this is using System.Text.Json) and then extract out the info you need:

var jsonObj = JsonObject.Parse(Properties.Resources.JSON);
var objectsArray = ((JsonArray)y["Data"]["Objects"]);

Console.WriteLine(objectsArray[0]["LastName"]);

A similar method would work with Newtonsoft.Json as well, although you'd need to use JObject instead of JsonObject and JArray rather than JsonArray in that case.

CodePudding user response：

If you are using System.Text.Json:

var jsonObject= JsonSerializer.Deserialize<JsonObject>(jsonString);

Then you can use jsonObject["Data"]["Objects"][0]["FirstName"] to get the data.