从Json字符串中提取数据
我有一个包含Json的字符串。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"
}
我正在尝试保留“ img_url”。我已经安装了Json.NET,并且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");
在我来说,我改变("People[0].Name")
到("img_url")
,("img_url[0])
etc..no运气
现在这是我的代码:
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,是否必须对字符串做一些事情?谢谢!
回答:
img_url
不是根对象的属性-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
另外的选择:
var url = (string)obj.SelectToken("data.img_url");
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