使用无效的键值“ fields”访问的JArray值 预期的阵列位置索引
如果您更换
// This takes the current bitcoin price and formats it so there is the correct amount of decimal places string story = (string)ja["response"]["results"]["fields"]["body"];@H_301_5@与
// This takes the current bitcoin price and formats it so there is the correct amount of decimal places string story = (string)ja["response"]["results"][0]["fields"]["body"];@H_301_5@应该适合您的示例。请注意，在您提供的示例中，结果后面的方括号表示要在访问代码中说明的数组。
解决方法
我正在使用监护人API尝试检索故事，但一直收到异常。json的字符串包含以下json，但是我无法使用LINQ访问主体。
这里是：
{ "response":{ "status":"ok","userTier":"approved","total":1,"startIndex":1,"pageSize":10,"currentPage":1,"pages":1,"orderBy":"newest","results":[{ "id":"sustainable-business/sustainable-finance-where-next-open-thread","sectionId":"sustainable-business","sectionName":"Guardian Sustainable Business","webPublicationDate":"2014-02-13T13:27:00Z","webTitle":"Where next for sustainable finance? - open thread","webUrl":"http://www.theguardian.com/sustainable-business/sustainable-finance-where-next-open-thread","apiUrl":"http://content.guardianapis.com/sustainable-business/sustainable-finance-where-next-open-thread","fields":{ "body":"<img src=\"http://hits.theguardian.com/b/ss/guardiangu-api/1/H.20.3/98867?ns=guardian&pageName=Where+next+for+sustainable+finance%3F+-+open+thread+Article+2043222&ch=Guardian+Sustainable+Business&c2=461773&c4=MIC%3A+Finance+%28GSB%29%2CMIC%3A+Guardian+Sustainable+Business%2CPRO%3A+Sustainability+%28Guardian+Professional%29&c3=theguardian.com&c6=Laura+Paddison&c7=14-Feb-13&c8=2043222&c9=Article\" width=\"1\" height=\"1\" />..." } }] } }我已经尝试了一切，包括：
string story = (string)ja["response"]["results"]["fields"]["body"];更新：
public partial class Story : PhoneApplicationPage { string url; string jsonData; // Http used so the json can be retrived via the get async methods HttpClient webClient = new HttpClient ; protected override void OnNavigatedTo(NavigationEventArgs e) { if (NavigationContext.QueryString.ContainsKey("key")) { string encodedValue = NavigationContext.QueryString["key"]; url = Uri.UnescapeDataString(encodedValue); textBox.Text = url; guardianPanorama ; } } private async void guardianPanorama { try { HttpResponseMessage Result = await webClient.GetAsync(url); // This takes the http response content and is turned into a string jsonData = await Result.Content.ReadAsStringAsync ; JObject ja = JObject.Parse(jsonData); // This takes the current bitcoin price and formats it so there is the correct amount of decimal places string story = (string)ja["response"]["results"]["fields"]["body"]; // It then gets added to the textbox textBox.Text = story; } catch (Exception errors) { MessageBox.Show("There has been a error with the Guardian API"); Console.WriteLine("An error occured:" + errors); } } }例外：
System.ArgumentException：使用无效键值“ fields”访问的JArray值。期望数组位置索引。
在Newtonsoft.Json.Linq.JArray.get_Item（Object key）
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