从较大的JSON字符串中检索所需的字符串

使用json2sharp之类的东西为json生成c#类，以防止错误。然后输入

var result = JsonConvert.DeserializeObject<RootObject>(myJsonString);

编辑
下面是如何获取摘要的示例:

RootObject result = JsonConvert.DeserializeObject<RootObject>(json);
List<string> summaries = new List<string>();
foreach (var item in result.issues)
{
    var summary = item.fields.summary;
    Console.WriteLine(summary);
    summaries.Add(summary);
}

RootObject将代表JSON的顶级对象，然后它将具有与JSON的每个属性对应的属性。

你可以这样尝试:

    public class Issuetype
    {
        public string self { get; set; }
        public string id { get; set; }
        public string description { get; set; }
        public string iconUrl { get; set; }
        public string name { get; set; }
        public bool subtask { get; set; }
    }
    public class AvatarUrls
    {
        public string __invalid_name__48x48 { get; set; }
        public string __invalid_name__24x24 { get; set; }
        public string __invalid_name__16x16 { get; set; }
        public string __invalid_name__32x32 { get; set; }
    }
    public class Project
    {
        public string self { get; set; }
        public string id { get; set; }
        public string key { get; set; }
        public string name { get; set; }
        public AvatarUrls avatarUrls { get; set; }
    }
    public class AvatarUrls2
    {
        public string __invalid_name__48x48 { get; set; }
        public string __invalid_name__24x24 { get; set; }
        public string __invalid_name__16x16 { get; set; }
        public string __invalid_name__32x32 { get; set; }
    }
    public class Reporter
    {
        public string self { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string emailAddress { get; set; }
        public AvatarUrls2 avatarUrls { get; set; }
        public string displayName { get; set; }
        public bool active { get; set; }
        public string timeZone { get; set; }
    }
    public class Priority
    {
        public string self { get; set; }
        public string iconUrl { get; set; }
        public string name { get; set; }
        public string id { get; set; }
    }
    public class AvatarUrls3
    {
        public string __invalid_name__48x48 { get; set; }
        public string __invalid_name__24x24 { get; set; }
        public string __invalid_name__16x16 { get; set; }
        public string __invalid_name__32x32 { get; set; }
    }
    public class Author
    {
        public string self { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string emailAddress { get; set; }
        public AvatarUrls3 avatarUrls { get; set; }
        public string displayName { get; set; }
        public bool active { get; set; }
        public string timeZone { get; set; }
    }
    public class AvatarUrls4
    {
        public string __invalid_name__48x48 { get; set; }
        public string __invalid_name__24x24 { get; set; }
        public string __invalid_name__16x16 { get; set; }
        public string __invalid_name__32x32 { get; set; }
    }
    public class UpdateAuthor
    {
        public string self { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string emailAddress { get; set; }
        public AvatarUrls4 avatarUrls { get; set; }
        public string displayName { get; set; }
        public bool active { get; set; }
        public string timeZone { get; set; }
    }
    public class Comment2
    {
        public string self { get; set; }
        public string id { get; set; }
        public Author author { get; set; }
        public string body { get; set; }
        public UpdateAuthor updateAuthor { get; set; }
        public string created { get; set; }
        public string updated { get; set; }
    }
    public class Comment
    {
        public int startAt { get; set; }
        public int maxResults { get; set; }
        public int total { get; set; }
        public List<Comment2> comments { get; set; }
    }
    public class Votes
    {
        public string self { get; set; }
        public int votes { get; set; }
        public bool hasVoted { get; set; }
    }
    public class AvatarUrls5
    {
        public string __invalid_name__48x48 { get; set; }
        public string __invalid_name__24x24 { get; set; }
        public string __invalid_name__16x16 { get; set; }
        public string __invalid_name__32x32 { get; set; }
    }
    public class Assignee
    {
        public string self { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string emailAddress { get; set; }
        public AvatarUrls5 avatarUrls { get; set; }
        public string displayName { get; set; }
        public bool active { get; set; }
        public string timeZone { get; set; }
    }
    public class StatusCategory
    {
        public string self { get; set; }
        public int id { get; set; }
        public string key { get; set; }
        public string colorName { get; set; }
        public string name { get; set; }
    }
    public class Status
    {
        public string self { get; set; }
        public string description { get; set; }
        public string iconUrl { get; set; }
        public string name { get; set; }
        public string id { get; set; }
        public StatusCategory statusCategory { get; set; }
    }
    public class Fields
    {
        public string summary { get; set; }
        public Issuetype issuetype { get; set; }
        public List<object> components { get; set; }
        public string created { get; set; }
        public string description { get; set; }
        public Project project { get; set; }
        public Reporter reporter { get; set; }
        public Priority priority { get; set; }
        public object resolution { get; set; }
        public string duedate { get; set; }
        public Comment comment { get; set; }
        public Votes votes { get; set; }
        public Assignee assignee { get; set; }
        public Status status { get; set; }
    }
    public class Issue
    {
        public string expand { get; set; }
        public string id { get; set; }
        public string self { get; set; }
        public string key { get; set; }
        public Fields fields { get; set; }
    }
    public class RootObject
    {
        public string expand { get; set; }
        public int startAt { get; set; }
        public int maxResults { get; set; }
        public int total { get; set; }
        public List<Issue> issues { get; set; }
    }
var t = JsonConvert.DeserializeObject<RootObject>(json);
var issues = t.issues;