c# - 如何使用 Linq 检查 JSON 中的标签

Question

我有以下 JSon 文件:-

{
  "requirements": {
    "-FileName": "sample.xls",
    "requirement": [
      {
        "desc": "Employee status        will be classified as: 
•   Assigned $ when employee is working on a project. 
•   Reserved when employee is scheduled to work on a project in near future. Unassigned when employee is not working on project.",
        "Id": "Req40"
      },
      {
        "Id": "NFR-2",
        "desc": "Team Leader should create resource allocation $% request in Maintain Project Module. Resource allocation request $@is associated with only one role. Project $@ Manager should provide roll-on date and roll-off date in resource allocation request."
      },
      {
        "Id": "req2",
        "desc": "PRMS must always be available except during the & @ scheduled maintenance. Scheduled maintenance must always be at 8PM on week days.",
        "message": "message of Req3"
      }
    ]
  }
}

我想检查 JSON 中是否存在“Id”和“desc”以外的标签。

为此，我使用了如下的 for 循环:-

for (int i = 0; i < NumberOfRequirements; i++)
{
    int NumberOfTagsInJson = (obj["requirements"]["requirement"][i]).Count();
    if (NumberOfTagsInJson == 2) // checks if tag other than id and desc is present Eg. Message
    {
        var id = obj["requirements"]["requirement"][i]["Id"];
        if (id == null)
        {
            IsHavingValidTags = false;
            break;
        }

        var Desc = obj["requirements"]["requirement"][i]["desc"];
        if (Desc == null)
        {
            IsHavingValidTags = false;
            break;
        }
    }
    else
    {
        IsHavingValidTags = false;
        break;
    }
}

如何在不使用 for 循环的情况下优化它。例如。我尝试将其转换为列表:-

(obj["requirements"]["requirement"]).ToList()

在此之后，我想使用 Linq 检查是否存在“Id”和“Desc”以外的标签。

我该如何使用它？

编辑 1

Answer 1

请尝试以下操作:

IsHavingValidTags = obj["requirements"]["requirement"]
    .All(_ => _.Count() == 2 && _["Id"] != null && _["desc"] != null);