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如何在没有未知密钥的情况下访问Json数据? 更新

如何解决如何在没有未知密钥的情况下访问Json数据? 更新

public static string RESTToJsonConverter(string incoming_data){
    string data = "[";
    int i = 0;
    Debug.Log("incoming_data"+incoming_data);
    data += "]";
    string JSONToParse = "{\"values\":" + data + "}";
    return JSONToParse;
}

下面是我运行该代码时的结果。我的问题是,如何在不使用"M4qRmfIqhKdy643Ujye"键(自动生成)的情况下访问/获取所有数据?

如果使用JavaScript,我可以使用object.values,但是由于我使用的是C#,因此我不知道如何获取数据。

{
    "-M4qRmfIqhKdy643Ujye": {
        "assetName": "avatar","id": "-M4qRmfnFya7bC43Ujye","imageName": "icon_avatar","name": "Bob","objName": "Bobby","point": "-M4vZRY9vhKs65n5L_Gk","versionNumber": "3"
    },"-M4qRmfIqhKdy643Ujye": {
        "assetName": "avatar","name": "Bobfds","objName": "Bobbydsf","name": "Bobfdsa","objName": "Bobbyfc","versionNumber": "3"
    }

}

更新

这是我的Downloader类中的功能之一

IEnumerator DownloadData(string dataPath,Action<string> callback){
    Debug.Log("dataPath=>"+dataPath);
    var token = LocalData.getAuth();
    Auth data = JsonUtility.FromJson<Auth>(token);
    var request = new 
    UnityWebRequest("https://test123.firebaseio.com/"+dataPath+".json? 
    auth="+data.idToken,"GET");
    request.downloadHandler = (DownloadHandler) new 
    DownloadHandlerBuffer();
    request.SetRequestHeader("Content-Type","application/json");

    yield return request.SendWebRequest();

    if (request.isHttpError || request.isNetworkError)
    {
        Debug.Log(request.error);
        NotificationHelper.showOnePopup("Error \n"+request.error);
        callback(null);
    }
    else
    {
        //Debug.Log(request.downloadHandler.text);
        string json = 
        FirebaseSetup.RESTToJsonConverter(request.downloadHandler.text);
        callback(json);
    }

下面是我的FirebaseSetup类

public static string FirebasetoJsonConverter(DataSnapshot snapshot){
    string data = "[";
    int i = 0;
    foreach(DataSnapshot s in snapshot.Children){
        data += s.GetRawJsonValue();
        i++;
        if(i != snapshot.ChildrenCount)
            data += ",";
    }
    data += "]";
    string JSONToParse = "{\"values\":" + data + "}";
    return JSONToParse;
}

public static string RESTToJsonConverter(string incoming_data)
{
    Debug.Log($"incoming_data:/n{incoming_data}");

    // remove everything before the SECOND occurrence of '{'
    // remove last occurrence of '}'
    var startIndex = incoming_data.IndexOf('{',incoming_data.IndexOf('{') + 1);
    var endindex = incoming_data.LastIndexOf('}') - 1;
    var json = incoming_data.Substring(startIndex,endindex - startIndex);

    // then remove leading or trailing whitespace
    json = json.Trim();
    
    Debug.Log($"json:/n{json}");

    var data = JsonUtility.FromJson<string>(json);

    return data;
}

尝试@derHugo代码后,出现新错误

This is my new error

解决方法

对于您的具体情况,我会反其道而行之:

根字段名称通常无关紧要,因此,如果您删除结尾的}并从 second {开始,则字符串

{
    "assetName": "avatar","id": "-M4qRmfnFya7bC43Ujye","imageName": "icon_avatar","name": "Bob","objName": "Bobby","point": "-M4vZRY9vhKs65n5L_Gk","versionNumber": "3"
}

您只需为其创建一个c#类

[Serializable]
public class Data
{
    public string assetName;
    public string id;
    public string imageName;
    public string name;
    public string objName;
    public string point;
    public string versionNumber;
}

然后您可以使用JsonUtility

public static Data RESTToJsonConverter(string incoming_data)
{
    Debug.Log($"incoming_data:/n{incoming_data}");

    // remove everything before the SECOND occurrence of '{'
    // remove last occurrence of '}'
    var startIndex = incoming_data.IndexOf('{',incoming_data.IndexOf('{') + 1);
    var endIndex = incoming_data.LastIndexOf('}') - 1;
    var json = incoming_data.Substring(startIndex,endIndex - startIndex);

    // then remove leading or trailing whitespace
    json = json.Trim();
    
    Debug.Log($"json:/n{json}");
   
    var data = JsonUtility.FromJson<Data>(json);

    return data;
}

更新

您现在更新了问题内容,​​因此现在数据作为数据对象的字典出现。

在这种情况下,您可以使用Newtonsoft Json.NET,它直接支持Dictionary的(反序列化),例如

[Serializable]
public class Data
{
    public string assetName;
    public string id;
    public string imageName;
    public string name;
    public string objName;
    public string point;
    public string versionNumber;
}

然后做类似的事情

public static Dictionary<string,Data> RESTToJsonConverter(string incoming_data)
{
    Debug.Log($"incoming_data:/n{incoming_data}");
   
    var data = JsonConvert.DeserializeObject<Dictionary<string,Data>(json);

    return data;
}

那么你可以做

var datas = RESTToJsonConverter(receivedRawData);
foreach(var data in data.Values)
{
    Debug.Log(data.id);
}
,

我想,您的问题是关于使用非唯一键的JSON反序列化。 如果是,请在这里查看:How to deserialize JSON with duplicate property names in the same object

对于您而言,解决方案应包含以下内容:

宣布您的合同:

public class Data
{
        public string assetName{get;set;}
        public string id{get;set;}
        public string imageName{get;set;}
        public string name{get;set;}
        public string objName{get;set;}
        public string point{get;set;}
        public string versionNumber{get;set;}
}

您的“自定义解串器”:)

public static JToken DeserializeAndCombineDuplicates(JsonTextReader reader)
{
    if (reader.TokenType == JsonToken.None)
    {
        reader.Read();
    }

    if (reader.TokenType == JsonToken.StartObject)
    {
        reader.Read();
        JObject obj = new JObject();
        while (reader.TokenType != JsonToken.EndObject)
        {
            string propName = (string)reader.Value;
            reader.Read();
            JToken newValue = DeserializeAndCombineDuplicates(reader);

            JToken existingValue = obj[propName];
            if (existingValue == null)
            {
                obj.Add(new JProperty(propName,newValue));
            }
            else if (existingValue.Type == JTokenType.Array)
            {
                CombineWithArray((JArray)existingValue,newValue);
            }
            else // Convert existing non-array property value to an array
            {
                JProperty prop = (JProperty)existingValue.Parent;
                JArray array = new JArray();
                prop.Value = array;
                array.Add(existingValue);
                CombineWithArray(array,newValue);
            }

            reader.Read();
        }
        return obj;
    }

    if (reader.TokenType == JsonToken.StartArray)
    {
        reader.Read();
        JArray array = new JArray();
        while (reader.TokenType != JsonToken.EndArray)
        {
            array.Add(DeserializeAndCombineDuplicates(reader));
            reader.Read();
        }
        return array;
    }

    return new JValue(reader.Value);
}   
private static void CombineWithArray(JArray array,JToken value)
{
    if (value.Type == JTokenType.Array)
    {
        foreach (JToken child in value.Children())
            array.Add(child);
    }
    else
    {
        array.Add(value);
    }
}

一些用于获取字典作为结果类型的代码

using (StringReader sr = new StringReader(json))
using (JsonTextReader reader = new JsonTextReader(sr))
{
    var parsed = DeserializeAndCombineDuplicates(reader).ToObject<Dictionary<string,Data[]>>();
    
    if(parsed!=null)
    {
        parsed
            .ToList()
            .ForEach(x=>Console.WriteLine("\r\nkey={0}\r\nvalues:\r\n{1}",x.Key,string.Join("\r\n",x.Value
                                              .Select(z=>string.Join("\t\t",z.name,z.id,z.objName))
                                              .ToArray())));
    } else Console.WriteLine("No way,dude!");
}

完整的解决方案位于此处:https://dotnetfiddle.net/lYBytk

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