json无法访问Newtonsoft.Json.Linq.JValue上的子值
我是json逻辑的新手，我有一个复杂的json，我必须从url读取并使用c＃绑定到数据网格。
我的json文件：
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"key": "atlas",
"emailAddress": "me@myproject.com",
"avatarUrls": {
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"24x24": "https://pr.myproject.net/sd/secure/useravatar?size=small&ownerId=atlas&avatarId=10609"
},
"displayName": "JIRA user",
"active": true,
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},
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"subtasks": [],
"reporter": {
"self": "https://pr.myproject.net/sd/rest/api/2/user?username=atlas",
"name": "atlas",
"key": "atlas",
"emailAddress": "me@myproject.com",
"avatarUrls": {
"48x48": "https://pr.myproject.net/sd/secure/useravatar?ownerId=atlas&avatarId=10609",
"24x24": "https://pr.myproject.net/sd/secure/useravatar?size=small&ownerId=atlas&avatarId=10609"
},
"displayName": "JIRA user",
"active": true,
"timeZone": "Europe"
},
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"iconUrl": "https://pr.myproject.net/sd/secure/viewavatar?size=xsmall&avatarId=10300&avatarType=issuetype",
"name": "Survey",
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},
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"project": {
"self": "https://pr.myproject.net/sd/rest/api/2/project/10103",
"id": "10103",
"key": "WO",
"name": "Field Service",
"avatarUrls": {
"48x48": "https://pr.myproject.net/sd/secure/projectavatar?avatarId=10324",
"24x24": "https://pr.myproject.net/sd/secure/projectavatar?size=small&avatarId=10324"
}
},
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"aggregatetimespent": null,
"resolutiondate": "2017-11-27T15:43:43.000+0200",
"workratio": -1,
"watches": {
"self": "https://pr.myproject.net/sd/rest/api/2/issue/WO-21/watchers",
"watchCount": 1,
"isWatching": false
},
"created": "2017-06-07T14:44:34.000+0300",
"updated": "2017-11-27T15:43:43.000+0200",
"timeoriginalestimate": null,
"description": null,
"summary": "Mobile Test",
"customfield_10240": null,
"customfield_10241": null,
"customfield_10000": "com",
"environment": null,
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"customfield_10513": [],
"customfield_10514": [],
"customfield_10516": [],
"duedate": null,
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}
},
{
"expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields",
"id": "10158",
"self": "https://pr.myproject.net/sd/rest/api/2/issue/10158",
"key": "WO-20",
"fields": {
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"fixVersions": [],
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"resolution": {
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"name": "Done"
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"issuelinks": [],
"assignee": {
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"name": "crewManagerTest",
"key": "crewmanagertest",
"emailAddress": "crewManagerTest@crewManagerTest.com",
"avatarUrls": {
"48x48": "https://secure.myproject.com/avatar/208c23b0f1be06c82402c1548a463e3e?d=mm&s=48",
"24x24": "https://secure.myproject.com/avatar/208c23b0f1be06c82402c1548a463e3e?d=mm&s=24"
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"name": "atlas",
"key": "atlas",
"emailAddress": "me@myproject.com",
"avatarUrls": {
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"24x24": "https://pr.myproject.net/sd/secure/useravatar?size=small&ownerId=atlas&avatarId=10609"
},
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"key": "atlas",
"emailAddress": "me@myproject.com",
"avatarUrls": {
"48x48": "https://pr.myproject.net/sd/secure/useravatar?ownerId=atlas&avatarId=10609",
"24x24": "https://pr.myproject.net/sd/secure/useravatar?size=small&ownerId=atlas&avatarId=10609"
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"id": "10103",
"key": "WO",
"name": "Field Service",
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} 我试图阅读这段代码：
JObject oJson = JObject.Parse(json);
var issueList = (from colIssies in oJson["expand"]["issues"]
select colIssies).ToList();
但是我收到此错误：System.InvalidOperationException：＆＃39;无法访问Newtonsoft.Json.Linq.JValue上的子值。＆＃39; 谁能帮我？ 提前谢谢。
1 个答案:
答案 0 :(得分：3)
有很多方法可以将json反序列化为一个对象，这一切都归结为你之后需要对数据做什么。 让我们假设您只需要数据的一个子集，因此您可以使用给定模板反序列化为匿名对象（使用json.net）
var definition = new
{
expand = default(string),
startAt = default(int),
maxResults = default(int),
total = default(int),
issues = new []{
new {
expand = default(string),
id = default(int),
key = default(string),
fields = new {
created = default(DateTimeOffset),
creator = new {
name = default(string),
},
assignee = new {
name = default(string),
key = default(string),
emailAddress = default(string),
displayName = default(string),
timeZone = default(string),
},
project = new {
name = default(string),
},
issuetype = new {
name = default(string),
},
status = new {
id = default(int),
name = default(string),
},
},
etc= "..."
}
}
};
然后您可以灵活地将提取的数据投影到任何给定的形状
var instance = JsonConvert.DeserializeAnonymousType(data, definition);
var projection = from issue in instance.issues
let date = issue.fields?.created
where date <= DateTime.Now
select new
{
id = issue.id,
key = issue.key,
type = issue.fields?.issuetype?.name,
created = issue.fields?.created,
project = issue.fields?.project?.name,
creator = issue.fields?.creator?.name,
assignee = issue.fields?.assignee?.name,
status = issue.fields?.status?.name,
};
当然有完整的智能感知支持
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