如何将 JSON 对象数据写入 csv 文件？

Question

我正在尝试将 JSON 数据导出到 CSV 文件。我创建了一个函数 WriteReportToCSV() 来完成这项工作。当我尝试运行我的程序时，我的代码没有读取该函数。我的代码中是否缺少某些内容？

TestApp.cs：

namespace TestApp
{
    class TestApp
    {
        public List<report> Reports { get; set; }
        public List<worklog> worklogs { get; set; }
        public List<answer> answers { get; set; }

        public void HarvestRaken()
        {
            var rc = GetReports();

            if (rc == null) return;

            rc.WriteReportToCSV(@"C:\Projects\TestApp\Report_Data.csv");

        }

        public string token = "1abcdef3-k89x-3w574-3589-2957c29ki7m1";

        public reportcontainer GetReports()
        {

            Console.WriteLine("Reading Reports");

            reportcontainer result = null;

            try
            {
                string url = "https://app.ticketappapp.com/api/v2/reports/?startDate=2017-06-07&endDate=2017-07-07&maxResults=10000&filters=project.id:279658&filters=project.id:279654&filters=project.id:279652";

                WebRequest request = WebRequest.Create(url);

                request.Method = "GET";
                request.Headers.Add("Authorization", "Bearer " + token);

                using (WebResponse response = request.GetResponse())
                {
                    using (Stream responstream = response.GetResponseStream())

                    {
                        string sr = new StreamReader(responstream).ReadToEnd();

                        reportcontainer rc = JsonConvert.DeserializeObject<reportcontainer>(sr);
                    }
                }
            }

            catch (Exception ex)
            {

            }

            return result;
        }

项目.cs：

namespace TestApp
{

    public class reportcontainer
    {
        public List<report> reports { get; set; }
        public string totalHits { get; set; }

        public void WriteReportToCSV(string Filepath)
        {

            using (var sw = new StreamWriter(Filepath))
            {

                foreach (report rep in this.reports)

                {
                    sw.WriteLine("Reading Reports:");
                    sw.WriteLine(" Reading:" + "," + rep.id + "," + rep.status + "," + rep.completed + "," + rep.date);

                }

                foreach (worklog wl in this.reports.SelectMany(r => r.worklogs))

                {
                    sw.WriteLine("Reading Worklogs:");
                    sw.WriteLine(" Reading:" + "," + wl.id + "," + wl.subcontractor + "," + wl.hours + "," + wl.workerCount + "," + wl.workdesc);

                }

                foreach (answer ans in this.reports.SelectMany(r => r.answers))
                {
                    sw.WriteLine("Reading Survey:");
                    sw.WriteLine(" Reading:" + "," + ans.id + "," + ans.question + "," + ans.questionid + "," + ans.FormattedAnswer + "," + ans.desc);

                }

            }
        }
    }

Answer 1

reportcontainer rc = JsonConvert.DeserializeObject<reportcontainer>(sr);

应该改为：

result = JsonConvert.DeserializeObject<reportcontainer>(sr);

因为您从未为 result 赋值，所以它总是为空。

因此WriteReportToCSV 永远不会被调用。