Json 检查NewtonSoft作业对象C中是否存在密钥
我有一个JSON对象NewtonSoft.JObject。它包含以下格式的多个条目:Json 检查NewtonSoft作业对象C中是否存在密钥,json,linq,json.net,Json,Linq,Json.net,我有一个JSON对象NewtonSoft.JObject。它包含以下格式的多个条目: { "id": "b65ngx59-2c67-4f5b-9705-8525d65e1b8", "name": "TestSample", "versions": [] }, { "id": "8acd8343-617f-4354-9b29-87a251d2f3e7", "name": "template 2", "versions": [ { "id": "556ng
{
"id": "b65ngx59-2c67-4f5b-9705-8525d65e1b8",
"name": "TestSample",
"versions": []
},
{
"id": "8acd8343-617f-4354-9b29-87a251d2f3e7",
"name": "template 2",
"versions": [
{
"id": "556ng956-57e1-47d8-9801-9789d47th5a5",
"template_id": "8acd8343-617f-4354-9b29-87a251d2f3e7",
"active": 1,
"name": "1.0",
"subject": "<%subject%>",
"updated_at": "2015-07-24 08:32:58"
}
]
}
它给出了所有ID。现在我想给linq添加一个条件,以便在列表中只填充包含值为1的active的模板_ID
所需输出:
[0] - 8acd8343-617f-4354-9b29-87a251d2f3e7
我应该对linq查询做什么更改才能得到这个结果
编辑:完整的代码是
public bool CheckIfTemplateExists(string template)
{
bool exists = false;
//web service call to retrieve jsonTemplates
JObject jObj = JObject.Parse(jsonTemplates);
List<JToken> templateIdList = jObj.Descendants()
.Where(t => t.Type == JTokenType.Property && ((JProperty)t).Name == "id")
.Select(p => ((JProperty)p).Value)
.ToList();
if(templateIdList.IndexOf(template) != -1)
{
exists = true;
}
return exists
}
试试这个:
您好,谢谢您的回答。我尝试了您的代码,但出现了错误,无法访问Newtonsoft.Json.Linq.JProperty上的子值。您能否共享整个不起作用的代码片段?我将尝试修复。编译器在到达您所理解的linq查询时给出错误。但是你能分享一下初始化jObj的代码吗?我已经添加了初始化jObj的代码和输入字符串。
[0] - 8acd8343-617f-4354-9b29-87a251d2f3e7
public bool CheckIfTemplateExists(string template)
{
bool exists = false;
//web service call to retrieve jsonTemplates
JObject jObj = JObject.Parse(jsonTemplates);
List<JToken> templateIdList = jObj.Descendants()
.Where(t => t.Type == JTokenType.Property && ((JProperty)t).Name == "id")
.Select(p => ((JProperty)p).Value)
.ToList();
if(templateIdList.IndexOf(template) != -1)
{
exists = true;
}
return exists
}
{"templates":
[{"id":"b65cae59-2c67-4f5b-9705-07465d65e1b8",
"name":"TestSample","versions":[]},
{"id":"8edb8343-617f-4354-9b29-87a251d2f3e7",
"name":"Template1",
"versions":[{"id":"556bb956-57e1-47d8-9801-9388d47cc5a5",
"template_id":"8edb8343-617f-4354-9b29-87a251d2f3e7",
"active":1,
"name":"1.0","subject":"\u003c%subject%\u003e",
"updated_at":"2015-07-24 08:32:58"}]}
List<JToken> templateIdList = jObj["templates"].Children()
.Where(child => child["versions"] != null
&& child["versions"].Any(version => version["active"].Value<int>() == 1))
.Select(x => x["id"]);