在unity中json响应解析到对象的问题

Question

我正在从。net最小API发送数据:

app.MapGet("/mytableDistinct", async ([FromServices] ShipmentDbContext dbContext) =>
{
IQueryable<long> query = dbContext.MyTables.Select(mt => mt.ShipmentID).Distinct();
var shipmentIDs = await query.ToListAsync();
return Results.Ok(new JsonResult(shipmentIDs));
});

显示的响应一致如下:

{"contentType":null,"serializerSettings":null,"statusCode":null,"value":[4739167,4745212]}

但是在解析这些数据时，它失败了，我不确定是什么错了。解析代码:

var request = UnityWebRequest.Get(url);
var operation = request.SendWebRequest();
while (!operation.isDone)
{
await Task.Yield();
}
if (request.result == UnityWebRequest.Result.Success)
{
//var jsonResponse = request.downloadHandler.text;
//var apiResponse = JsonUtility.FromJson<AllShipmentIDs>(jsonResponse);
try
{
var jsonResponse = request.downloadHandler.text;
Debug.Log(jsonResponse);
var apiResponse = JsonUtility.FromJson<AllShipmentIDs>(jsonResponse);
List<int> shipmentIDs = apiResponse.Value;
Debug.Log("Shipment IDs: " + string.Join(",", shipmentIDs));
}
catch (Exception ex)
{
Debug.LogError($"Failed to deserialize API response: {ex.Message}");
}
}

值总是null。这是对象模型:

[System.Serializable]
public class AllShipmentIDs
{
public string ContentType { get; set; }
public object SerializerSettings { get; set; }
public int? StatusCode { get; set; }
public List<int> Value { get; set; } = new List<int>();
}

如果上面的'Value'没有初始化，它显示，对象引用没有设置为对象的实例，错误。

我尝试了小写和CamelCase，但似乎没有使其解析成功。在同一个脚本上，我可以解析来自另一个端点的其他对象。我该怎么办?

Answer 1

我建议跳过不必要的换行，只返回id列表:

app.MapGet("/mytableDistinct", async ([FromServices] ShipmentDbContext dbContext) =>
{
IQueryable<long> query = dbContext.MyTables.Select(mt => mt.ShipmentID).Distinct();
return await query.ToListAsync();
});

在Unity端解析List<long>(如果它支持根数组):

var apiResponse = JsonUtility.FromJson<List<long>>(jsonResponse);

值总是null

我没有使用JsonUtility.FromJson，但我猜它是区分大小写的，所以你需要更改类以具有相应的属性名称(即public class AllShipmentIDs{public List<int> value { get; set; }}或使用第三方库来处理JSON)。

乌利希期刊指南

根据这个答案，你可能需要做如下的事情:

app.MapGet("/mytableDistinct", async ([FromServices] ShipmentDbContext dbContext) =>
{
// ...
return new {Items = await query.ToListAsync()};
});

在Unity端:

int[] ids = JsonHelper.FromJson<int>(jsonString);