解析 JSON 流时遇到问题，

Question

我能够使用 C# .Net 中的基本身份验证和 HTTPWebResponse 连接到供应商的 Web API。我能够在 StreamReader 中获取 JSON 流，但是在解析 JSON 时，我得到空值并且无法获取单个字符串或变量中的数据元素。请查看随附的 JSON 文件和帮助...

这是我的代码...

 username = "****";
 var password = "***";
 var url = "*****";
 var encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username  + ":" + password));
 var webRequest = (HttpWebRequest)WebRequest.Create(url);
 webRequest.Headers.Add("Authorization", "Basic " + encoded);
 webRequest.Method = "GET";
 webRequest.Accept = "application/json";
 webRequest.ContentType = "application/json";


 var webResponse = (HttpWebResponse)webRequest.GetResponse();
 var reader = new StreamReader(webResponse.GetResponseStream());
 string s = reader.ReadToEnd();

尝试了所有解决方案，但遇到了麻烦。下面是我的一些 JSON 流。

{"status":"success","message":"笔记请求处理成功，返回100条记录。","data":[{"noteId":"0000","studentId ":"000000","advisorId":"0000111","dateCreated":"01/20/2015","studentStatus":"On path","noteBody":"这是一个测试笔记，它用于一个特定的学生。它适用于学生 000000","edited":"N","dateEdited":"N/A","privateNote":"N","re​​moved":"N","re​​movedDate":" N/A","displayDate":"01/20/2015","noteCreatedWithReminder":"N","noteCreatedWithStatusChange":"N"},{"noteId":"0001","studentId":"000001" ,"advisorId":"0000111","dateCreated":"01/20/2015","studentStatus":"进行中","noteBody":"这是一个测试笔记，它是针对特定学生的。它适用于学生 000001","edited":"N","dateEdited":"N/A","privateNote":"N","re​​moved":"N","re​​movedDate":"N/A", "displayDate":"01/20/2015","noteCreatedWithReminder":"N","noteCreatedWithStatusChange":"Y"}

Answer 1

我建议使用诸如JSON.net 之类的库，它会更容易解析，您需要做的就是创建模型类：

public class Note
{
    public string noteId { get; set; }
    public string studentId { get; set; }
    public string advisorId { get; set; }
    public string dateCreated { get; set; }
    public string studentStatus { get; set; }
    public string noteBody { get; set; }
    public string edited { get; set; }
    public string dateEdited { get; set; }
    public string privateNote { get; set; }
    public string removed { get; set; }
    public string removedDate { get; set; }
    public string displayDate { get; set; }
    public string noteCreatedWithReminder { get; set; }
    public string noteCreatedWithStatusChange { get; set; }
}

public class Response
{
    public string status { get; set; }
    public string message { get; set; }
    public List<Note> notes { get; set; }
}

那么这就是你的解析方式

var response = JsonConvert.DeserializeObject<Response>(json);
Console.WriteLine("status =" + response.status);