C# json无法访问Newtonsoft.json.Linq.JValue上的子值

C# json无法访问Newtonsoft.json.Linq.JValue上的子值,c#,json,linq,C#,Json,Linq,我不熟悉json逻辑,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: { "expand": "schema,names", "startAt": 0, "maxResults": 50, "total": 6, "issues": [{ "expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields", "id": "10502",

我不熟悉json逻辑,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:

 {
"expand": "schema,names",
"startAt": 0,
"maxResults": 50,
"total": 6,
"issues": [{
    "expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields",
    "id": "10502",
    "self": "https://pr.myproject.net/sd/rest/api/2/issue/10502",
    "key": "WO-60",
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        "labels": [],           
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        "versions": [],
        "customfield_10219": null,
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        "assignee": {
            "self": "https://pr.myproject.net/sd/rest/api/2/user?username=crewManagerTest",
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            "key": "crewmanagertest",
            "emailAddress": "crewManagerTest@crewManagerTest.com",
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            },
            "displayName": "crewManagerTest",
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            "timeZone": "Europe"
        },
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            "self": "https://pr.myproject.net/sd/rest/api/2/status/10000",
            "description": "",
            "iconUrl": "https://pr.myproject.net/sd/images/icons/status_generic.gif",
            "name": "To Do",
            "id": "10000",
            "statusCategory": {
                "self": "https://pr.myproject.net/sd/rest/api/2/statuscategory/2",
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                "key": "new",
                "colorName": "blue-gray",
                "name": "To Do"
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            },
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            "timeZone": "Europe"
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            "displayName": "JIRA user",
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            "name": "Survey",
            "subtask": false,
            "avatarId": 10300
        },
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        "project": {
            "self": "https://pr.myproject.net/sd/rest/api/2/project/10103",
            "id": "10103",
            "key": "WO",
            "name": "Field Service",
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            }
        },
        "customfield_10275": null,
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        "workratio": -1,
        "watches": {
            "self": "https://pr.myproject.net/sd/rest/api/2/issue/WO-60/watchers",
            "watchCount": 1,
            "isWatching": false
        },
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        "updated": "2017-11-27T15:44:50.000+0200",
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        "summary": "Mobile Test",
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},
{
    "expand": "operations,versionedRepresentations,editmeta,changelog,renderedFields",
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    "self": "https://pr.myproject.net/sd/rest/api/2/issue/10166",
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            "description": "",
            "iconUrl": "https://pr.myproject.net/sd/images/icons/statuses/generic.png",
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        "creator": {
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{
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    "id": "10164",
    "self": "https://pr.myproject.net/sd/rest/api/2/issue/10164",
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} 我试图用以下代码阅读:

JObject oJson = JObject.Parse(json);
var issueList = (from colIssies in oJson["expand"]["issues"]
select colIssies).ToList();
但我得到了这个错误:System.invalidoOperationException:“无法访问Newtonsoft.Json.Linq.JValue上的子值。” 谁能帮帮我吗?
提前感谢。

有很多方法可以将json反序列化到对象,这一切归结为以后需要如何处理数据。 假设您只需要数据的一个子集,因此可以使用给定模板反序列化为匿名对象(使用)

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,
                 };
var instance=JsonConvert.DeserializeAnonymousType(数据,定义);
var projection=来自实例中的问题。问题
让日期=问题。字段?已创建

在date中,有很多方法可以将json反序列化到对象,这一切归结为以后需要对数据做什么。 假设您只需要数据的一个子集,因此可以使用给定模板反序列化为匿名对象(使用)

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,
                 };
var instance=JsonConvert.DeserializeAnonymousType(数据,定义);
var projection=来自实例中的问题。问题
让日期=问题。字段?已创建

where date您发布了917行JSON,然后只是一段代码。请将此简化为一个简单的JSON示例,该示例仍然演示了您要做的事情和问题。通过在查询中包含“expand”,您想要实现什么?@DylanNicholson没有什么特别的。我试着阅读json结构,但它似乎是您想要的“问题”节点,与“扩展”节点无关。你说得对。你已经发布了917行JSON,然后只是一段代码。请将此简化为一个简单的JSON示例,该示例仍然演示了您要做的事情和问题。通过在查询中包含“expand”,您想要实现什么?@DylanNicholson没有什么特别的。我试着阅读json结构,但它似乎是您想要的“问题”节点,与“扩展”节点无关。你有权利。