Question

我目前正在从网址收集json，但我收到了一个我从未经历过的错误，之后看起来像这样：

Accessed JArray values with invalid key value: "id". Int32 array index expected

这就是JSON的外观（1个项目的例子，其中有更多）：

[  
   {  
      "id":19205,
      "company_id":2658,
      "external_link":"",
      "county":{  
         "id":12,
         "name":" ",
         "future":"",
         "infrastructure":""
      },
      "category":{  
         "id":5,
         "name":""
      },
      "company":{  
         "id":2658,
         "company_info":[  

         ]
      },
      "merits":[  

      ],
      "reqs":[  
         {  
            "id":56548,
            "ad_id":19205
         },
         {  
            "id":56549,
            "ad_id":19205
         },
         {  
            "id":56550,
            "ad_id":19205
         },
         {  
            "id":56551,
            "ad_id":19205
         },
         {  
            "id":56552,
            "ad_id":19205
         }
      ],
      "contact":null
   }
]

我如何收集json：

static public async Task<JArray> getData()
    {
        var httpClientRequest = new HttpClient();
        try
        {
            var result = await httpClientRequest.GetAsync("https://mydata.com");
            var resultString = await result.Content.ReadAsStringAsync();
            var jsonResult = JArray.Parse(resultString);
            return jsonResult;
        }

        catch
        {
            return null;
        }
    }

我如何尝试使用它以及发生错误的位置：

var getData = await dataApi.getData();

foreach (var jobs in getData)
{       
    System.Diagnostics.Debug.WriteLine(getData["id"].ToString()); //CRASH: `Accessed JArray values with invalid key value: "id". Int32 array index expected
}

为了成功收集JSON，我需要如何调整代码？

Answer 1

您正尝试在for循环中引用该数组，请尝试：

System.Diagnostics.Debug.WriteLine(jobs["id"].ToString());

或

System.Diagnostics.Debug.WriteLine(jobs.id.ToString());

您可能还需要解析Json以使其被c＃代码解释见this post about parsing Json with c#

＆＃34;使用无效键值访问JArray值：＆＃34; id＆＃34;。预期Int32数组索引＆＃34;收集json时崩溃

1 个答案: