获取对ArrayList对象的访问 [英] Getting access to ArrayList object

问题描述

我正在开发一个读取一些JSON数据并进行一些统计的应用程序，但是现在我遇到了问题.

I'm developing an application that reads some JSON data and makes some statistics, but now I've run into a problem.

我有一个像这样的字符串:

I have a string like this:

{
"position":[
  {
     "someKey1":"someVal1",
     "someKey2":"someVal2",
  },
  {
     "someKey1":"someVal3",
     "someKey2":"someVal4",
  }
}

我想访问someKeys和someValues.

I want to access the someKeys and someValues.

我正在将其转换成这样的字典:

I'm converting it to a dictionary like this:

Dictionary<string, object> values = deserializeJSON(json_string);

很抱歉，忘记添加deserializeJSON:

Edit 1: Sorry, forgot to add deserializeJSON:

private Dictionary<string, object> deserializeJSON(string p_jsonObject)
{
    JavaScriptSerializer serializer = new JavaScriptSerializer();
    return serializer.Deserialize<Dictionary<string, dynamic>>(p_jsonObject);
}

现在，我无法使用键"position"访问值列表.如果我尝试打印值的类型["position"]，我会得到:

Now I have trouble getting access to the list of values with the key "position". If I try to print the type of values["position"] I get:

System.Collections.ArrayList

所以我以为我可以反复进行此操作，但我不能.我尝试使用枚举器(在这里读到，它将可以遍历对象，并且必须将其添加到ArrayList中以进行强制转换):

So I thought I could just iterate through this, but I can't. I tried using enumerator (read in here that it would make it possible to iterate over the objects, and that I have to add it to an ArrayList to cast it):

ArrayList arr = new ArrayList();
IEnumerable enumerable = values["position"] as IEnumerable;

foreach (object element in enumerable)
{
    arr.Add(element);
}

当我打印arr [0]时，我得到:

When I print arr[0] I get:

System.Collections.Generic.Dictionary`2[System.String,System.Object]

在这里我很困惑.我假设这是someKeys和someVals的列表，应该正确，对吧? 现在，我很幸运地尝试访问这些值.我尝试了arr [0] ["someKey1"]，但收到一个错误，我无法将索引应用于对象".

Here I'm confused. I assume it's the list of someKeys and someVals, which should be correct, right? Now I've tried, with no luck, getting access to these values. I tried arr[0]["someKey1"] but get an error that I cannot apply indexing to 'object'.

对解决方案有何想法?理想的解决方案更理想吗? :)

Any ideas on a solution? Ideally a more elegant solution? :)

预先感谢

推荐答案

您可以使用 Linq到JSON (从NuGet添加Newtonsoft的JSON.NET):

You can use Linq to JSON (add Newtonsoft's JSON.NET from NuGet):

JObject jo = JObject.Parse(json);
var value = (string)jo["position"][1]["someKey1"]; // someVal3

另一个示例:

JObject jo = JObject.Parse(json);
JArray positions = (JArray)jo["position"];
foreach (var item in positions)
{
    // use (string)item["someKey1"]
    // use (string)item["someKey2"]
}

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