Question

使用VB.NET 这是我的HTTP请求：

https://inventory.data.gov/api/action/datastore_search?resource_id=8ea44bc4-22ba-4386-b84c-1494ab28964b&filters= {％22FiscalYear％22：％222017 22％，％22Zip％22：％2290210％22}

（抱歉，我无法获得格式正确的链接）

我收到回复并解析它。我无法仅提取“餐”。从退回的比率。

Dim json As String = responseFromServer
Dim ser As JObject = JObject.Parse(json)
Dim data As List(Of JToken) = ser.Children().ToList
Dim output As String = ""

For Each item As JProperty In data
    --> Not sure what to do in here.
Next

非常感谢您的协助。

Answer 1

从API返回的JSON看起来像这样（删除了一些数据以节省空间）：

{
  "help": "https://inventory.data.gov/api/3/action/help_show?name=datastore_search",
  "success": true,
  "result": {
    "resource_id": "8ea44bc4-22ba-4386-b84c-1494ab28964b",
    "fields": [
      ...snip...
    ],
    "records": [
      {
        "City": "Los Angeles",
        "Dec": "158",
        "Feb": "175",
        "Zip": "90210",
        "Aug": "158",
        "Sep": "158",
        "Apr": "158",
        "Jun": "158",
        "State": "CA",
        "Jul": "158",
        "Meals": "64",
        "County": "Los Angeles County, CA",
        "May": "158",
        "DestinationID": "22",
        "Mar": "175",
        "Jan": "175",
        "LocationDefined": "Los Angeles / Orange / Ventura / Edwards AFB less the city of Santa Monica",
        "Nov": "158",
        "_id": 39056,
        "Oct": "158",
        "FiscalYear": "2017"
      }
    ],
    "_links": {
      "start": "/api/action/datastore_search?filters=%7B%22FiscalYear%22%3A%222017%22%2C%22Zip%22%3A%2290210%22%7D&resource_id=8ea44bc4-22ba-4386-b84c-1494ab28964b",
      "next": "/api/action/datastore_search?offset=100&filters=%7B%22FiscalYear%22%3A%222017%22%2C%22Zip%22%3A%2290210%22%7D&resource_id=8ea44bc4-22ba-4386-b84c-1494ab28964b"
    },
    "filters": {
      "Zip": "90210",
      "FiscalYear": "2017"
    },
    "total": 1
  }
}

将数据解析为JObject后，您只需向下钻取结构即可获得所需的值：

Dim ser As JObject = JObject.Parse(json)
Dim mealRate = CInt(ser("result")("records")(0)("Meals"))

我正在努力获得＆＃34; MEAL＆＃34;来自GSA API的费率

1 个答案: