c# - 如何在 C# 中解析 JsonObject

Question

我正在尝试解析下面的 json 对象，但由于 json 对象中的“讲师”，我不知道该怎么做？我不知道如何管理“讲师”，他们是 Json 中的另一个对象，但在 data[0] 中它是一个对象，在 data[1] 中它是一个标志或 Boolean 。这件事让我很困惑。知道我怎么能做到这一点吗？？？

{
    "result": "Success",
    "data": [
        {
            "student_course_id": "82",
            "student_id": "30",
            "term_course_id": "18",
            "section_id": "3",
            "term_id": "12",
            "course_id": "15",
            "credit_hours": "26",
            "is_elective": "Elective",
            "is_practical": "0",
            "teacher_id": "10",
            "program_id": "5",
            "course_code": "E2",
            "course_title": "English 2",
            "lecturer": {
                "fname": "Ali",
                "lname": "farooq",
                "phone": "1234567890",
                "email": "farooq@teacher.com",
                "thumb": "../photos/thumb/1391515491.png"
            }
        },
        {
            "student_course_id": "83",
            "student_id": "30",
            "term_course_id": "19",
            "section_id": "3",
            "term_id": "12",
            "course_id": "16",
            "credit_hours": "26",
            "is_elective": "Elective",
            "is_practical": "0",
            "teacher_id": "8",
            "program_id": "5",
            "course_code": "C2",
            "course_title": "Culture 2",
            "lecturer": false
        }
        ]
}

C#代码

public async static Task<StudentSubjectsClassWithError> StudentSubjectsList()
{
    HttpClient client = new HttpClient();

    string baseUrl = getBaseUrl();

    try
    {
        string flickrResult = await client.GetStringAsync(baseUrl);
        StudentSubjectsClassWithError studentSubjectsResult = new StudentSubjectsClassWithError();
        try
        {

            StudentSubjectsJson apiData =
                JsonConvert.DeserializeObject<StudentSubjectsJson>(flickrResult);

            List<StudentSubjectsClass> mStudentSubjectsList = new List<StudentSubjectsClass>();

            if (apiData.data != null && apiData.result == "Success")
            {
                studentSubjectsResult.message = "";
                studentSubjectsResult.result = apiData.result;

                foreach (StudentSubjectsJsonItem data in apiData.data)
                {
                    StudentSubjectsClass studentSubjects = new StudentSubjectsClass();

                    studentSubjects.student_course_id = data.student_course_id;
                    studentSubjects.student_id = data.student_id;
                    studentSubjects.term_course_id = data.term_course_id;
                    studentSubjects.section_id = data.section_id;
                    studentSubjects.term_id = data.term_id;
                    studentSubjects.course_id = data.course_id;
                    studentSubjects.credit_hours = data.credit_hours;
                    studentSubjects.is_elective = data.is_elective;
                    studentSubjects.is_practical = data.is_practical;
                    studentSubjects.program_id = data.program_id;
                    studentSubjects.course_code = data.course_code;
                    studentSubjects.course_title = data.course_title;

                   //// studentSubjects.lecturer ?????

                    mStudentSubjectsList.Add(studentSubjects);
                }
            }
            else
            {
                studentSubjectsResult.result = apiData.result;
                studentSubjectsResult.message = "No records found.";

            }
            studentSubjectsResult.studentSubjectsList = mStudentSubjectsList;
            return studentSubjectsResult;
        }
        catch (JsonSerializationException)
        {

            try
            {

                StudentSubjectsErrorJson apiData =
                   JsonConvert.DeserializeObject<StudentSubjectsErrorJson>(flickrResult);
                studentSubjectsResult.result = apiData.result;
                studentSubjectsResult.message = apiData.data;
                studentSubjectsResult.studentSubjectsList = null;
                return studentSubjectsResult;
            }

            catch (JsonSerializationException)
            {
            }


        }
        return null;
    }
    catch (Exception)
    {
        return null;
     //   MessageBox.Show("Internet Connection Problem");
    }
}

Answer 1

我正在使用 Visual Studio 2012，当我想将 Json 字符串转换为 C# 类对象时，我复制 Json 字符串并

-> Click Edit
-> Click Paste Special
-> Click Paste JSON as Classes

或者您可以使用 Jonathan Keith 提供的出色在线工具 http://json2csharp.com/

使用 json2csharp 我从你的 json 中得到了这个类

public class Datum
{
    public string student_course_id { get; set; }
    public string student_id { get; set; }
    public string term_course_id { get; set; }
    public string section_id { get; set; }
    public string term_id { get; set; }
    public string course_id { get; set; }
    public string credit_hours { get; set; }
    public string is_elective { get; set; }
    public string is_practical { get; set; }
    public string teacher_id { get; set; }
    public string program_id { get; set; }
    public string course_code { get; set; }
    public string course_title { get; set; }
    public object lecturer { get; set; }
}

public class RootObject
{
    public string result { get; set; }
    public List<Datum> data { get; set; }
}

编辑

我还注意到您的数据数组将讲师作为对象，第二个数据将讲师作为 bool 值。如果它不存在，您可以通过简单地不包括讲师来解决这个问题。这会将类更改为:

public class Lecturer
{
    public string fname { get; set; }
    public string lname { get; set; }
    public string phone { get; set; }
    public string email { get; set; }
    public string thumb { get; set; }
}

public class Datum
{
    public string student_course_id { get; set; }
    public string student_id { get; set; }
    public string term_course_id { get; set; }
    public string section_id { get; set; }
    public string term_id { get; set; }
    public string course_id { get; set; }
    public string credit_hours { get; set; }
    public string is_elective { get; set; }
    public string is_practical { get; set; }
    public string teacher_id { get; set; }
    public string program_id { get; set; }
    public string course_code { get; set; }
    public string course_title { get; set; }
    public Lecturer lecturer { get; set; }
}

public class RootObject
{
    public string result { get; set; }
    public List<Datum> data { get; set; }
}