从Json字符串中提取数据

我有一个包含Json的字符串。 它看起来像这样:

"status_code":200, "status_txt":"OK", "data": { "img_name":"D9Y3z.png", "img_url":"http:\/\/s1.uploads.im\/D9Y3z.png", "img_view":"http:\/\/uploads.im\/D9Y3z.png", "img_width":"167", "img_height":"288", "img_attr":"width=\"167\" height=\"288\"", "img_size":"36.1 KB", "img_bytes":36981, "thumb_url":"http:\/\/s1.uploads.im\/t\/D9Y3z.png", "thumb_width":360, "thumb_height":360, "source":"http:\/\/www.google.com\/images\/srpr\/nav_logo66.png", "resized":"0", "delete_key":"df149b075ab68c38" } 

我试图抓住“img_url”。 我安装了Json.NET,我在这里发现了类似的问题..

例如这样的事情:

 JObject o = JObject.Parse("{'People':[{'Name':'Jeff'},{'Name':'Joe'}]}"); // get name token of first person and convert to a string string name = (string)o.SelectToken("People[0].Name"); 

在我的情况下,我改变了("People[0].Name")("img_url")("img_url[0])等等。没有运气

这是我现在的代码:

 public string tempJson { get; set; } public ActionResult SaveUploadedFile(string test) { using (WebResponse wrs = wrq.GetResponse()) using (Stream stream = wrs.GetResponseStream()) using (StreamReader reader = new StreamReader(stream)) { string json = reader.ReadToEnd(); tempJson = json; } } 

在提取值之前,我是否必须对字符串执行某些操作? 谢谢!

img_url不是root对象的属性 – 它是data对象的属性:

 var obj = JObject.Parse(json); var url = (string)obj["data"]["img_url"]; // http://s1.uploads.im/D9Y3z.png 

另外一个选项:

 var url = (string)obj.SelectToken("data.img_url"); 

在这个网站的帮助下

 var obj = JsonConvert.DeserializeObject(json); Console.WriteLine(obj.data.img_url); 

 public class Data { public string img_name { get; set; } public string img_url { get; set; } public string img_view { get; set; } public string img_width { get; set; } public string img_height { get; set; } public string img_attr { get; set; } public string img_size { get; set; } public int img_bytes { get; set; } public string thumb_url { get; set; } public int thumb_width { get; set; } public int thumb_height { get; set; } public string source { get; set; } public string resized { get; set; } public string delete_key { get; set; } } public class RootObject { public int status_code { get; set; } public string status_txt { get; set; } public Data data { get; set; } } 

你也可以使用dynamic关键字做同样的事情(不要声明上面的类)

 dynamic obj = JsonConvert.DeserializeObject(json); Console.WriteLine(obj.data.img_url);