使用空数组反序列化JSON对象
当有空/空属性(使用JSON.NET)时,我在反序列化JSON对象时遇到了一些麻烦,并希望有人能指引我朝着正确的方向发展。下面是代码,我想一个片段,并在dotnetfiddle使用空数组反序列化JSON对象
这里被测试的The JSON的示例:
{
"`LCA0009": [],
"`LCA0001": {
"23225007190002": "1",
"23249206670003": "1",
"01365100070018": "5"
},
"`LCA0003": {
"23331406670018": "1",
"24942506670004": "1"
},
"`LCA0005": {
"01365100070018": "19"
}
}
我想使用此代码:
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
public class Program
{
public static void Main()
{
string json = "{\"`LCA0009\": [], \"`LCA0001\": {\"23225007190002\": \"1\",\"23249206670003\": \"1\",\"01365100070018\": \"5\"},\"`LCA0003\": {\"23331406670018\": \"1\",\"24942506670004\": \"1\"},\"`LCA0005\": {\"01365100070018\": \"19\"}}";
Console.WriteLine(json);
Console.WriteLine();
Console.WriteLine("This works");
var root = JsonConvert.DeserializeObject(json);
Console.WriteLine(root);
Console.WriteLine("This doesn't work");
var root2 = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, int>>>(json);
Console.WriteLine(root2);
foreach (var locationKvp in root2)
{
foreach (var skuKvp in locationKvp.Value)
{
Console.WriteLine("location: " + locationKvp.Key + ", sku: " + skuKvp.Key + ", qty: " + skuKvp.Value);
}
}
}
}
在“不工作”上面的是,我得到这个错误:
Run-time exception (line 19): Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'System.Collections.Generic.Dictionary`2[System.String,System.Int32]' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path '`LCA0009', line 1, position 14.
我如何删除properti es有一个空/空数组?
基本上,JSON不一致,最好的答案是使其一致。无论谁给你JSON需要被告知修复它。
直到/除非你能做到这一点,你可以在“原始”版转换Dictionary<string, Dictionary<string, int>>
自己,但它更多的工作:
https://dotnetfiddle.net/zdeOOX
string json = "{\"`LCA0009\": [], \"`LCA0001\": {\"23225007190002\": \"1\",\"23249206670003\": \"1\",\"01365100070018\": \"5\"},\"`LCA0003\": {\"23331406670018\": \"1\",\"24942506670004\": \"1\"},\"`LCA0005\": {\"01365100070018\": \"19\"}}";
// Convert it
var root = (JObject)JsonConvert.DeserializeObject(json);
var results = new Dictionary<string, Dictionary<string,int>>();
foreach (var entry in root)
{
var dict = new Dictionary<string,int>();
if (!(entry.Value is JArray))
{
foreach (var subentry in (JObject)entry.Value)
{
int v;
if (int.TryParse(((JValue)subentry.Value).ToString(), out v))
{
dict.Add(subentry.Key, v);
}
}
}
results.Add(entry.Key, dict);
}
// Results:
foreach (var name in results.Keys)
{
var entry = results[name];
Console.WriteLine(name + ":");
foreach (var entryKey in entry.Keys)
{
Console.WriteLine("- " + entryKey + ": " + entry[entryKey]);
}
}
我希望可以做出更优雅与Linq。
这里存在的根本问题是JSON不一致,给你一些数组作为一些条目,但为其他对象。解决这个问题的最好的地方就是生成JSON的地方:而不是LCA0009:[]',它应该是''LCA0009“:{}'。 –
修复JSON [解决问题](https://dotnetfiddle.net/K7wtnh)。 –
@ T.J。 Crowder - 不幸的是,我不控制消息来源。我想我可以通过一些字符串替换函数将[]转换为{},这将作为一种工作方式,直到我修改了源文件。 – jared