我试图创建一种方法将整个json文件转换为我的自定义数据类型,称为产品
{
"unique_image_url_prefixes":[
],
"products_and_categories":{
"Tops/Sweaters":[
{
"name":"Knit Stripe S/S Raglan Top",
"id":302418,
"image_url":"//d17ol771963kd3.cloudfront.net/129807/ca/_9UoFPZi8Zs.jpg",
"image_url_hi":"//d17ol771963kd3.cloudfront.net/129807/rc/_9UoFPZi8Zs.jpg",
"price":9900,
"sale_price":0,
"new_item":true,
"position":10,
"category_name":"Tops/Sweaters",
"price_euro":11600,
"sale_price_euro":0
}
],
"Shirts":[
{
"name":"Supreme®/Comme des Garçons SHIRT® Eyes Rayon Shirt",
"id":302426,
"image_url":"//d17ol771963kd3.cloudfront.net/132067/ca/9O934PRlIcw.jpg",
"image_url_hi":"//d17ol771963kd3.cloudfront.net/132067/rc/9O934PRlIcw.jpg",
"price":25800,
"sale_price":0,
"new_item":true,
"position":3,
"category_name":"Shirts",
"price_euro":29800,
"sale_price_euro":0
}
]
}
}
这只显示整个来源所在文件的几个部分,PasteBin
所以我试图做的就是转换它的每一部分(它是产品/项目)
{
"name":"Knit Stripe S/S Raglan Top",
"id":302418,
"image_url":"//d17ol771963kd3.cloudfront.net/129807/ca/_9UoFPZi8Zs.jpg",
"image_url_hi":"//d17ol771963kd3.cloudfront.net/129807/rc/_9UoFPZi8Zs.jpg",
"price":9900,
"sale_price":0,
"new_item":true,
"position":10,
"category_name":"Tops/Sweaters",
"price_euro":11600,
"sale_price_euro":0
}
到我的名为Product
的自定义数据类型 public Product(string id_p, string name_p, string image_url_p, string category_name_p)
{
id = id_p;
name = name_p;
image_url = image_url_p;
category_name = category_name_p;
}
然后我尝试将这些值中的每一个与我的程序用户指定的值进行比较
List<Product> products = JsonConvert.DeserializeObject<List<Product>>(JsonString);
if (products == null) return null;
foreach (var product in products)
{
// ownerform.Log(product.name, 0);
if (product.category_name == T.item.Category && product.name.ToLower().Contains(T.item.Keyword.ToLower()))
{
ownerform.Log(string.Format("Resolved Keyword! Item : {0}", product.name), T.TID);
return new GetUrlResponse(true, product);
}
}
我现在正在做的事情不起作用,我真的无法找到它。
答案 0 :(得分:0)
在C#中使用JSON的好方法是使用JSON.NET
你可以找到API Documentation from JSON.NET - 官方网站可以帮助你解决这个问题。
这是将整个JSON文件转换为自定义数据类型的示例... 例如:用户 这只是一个简单的例子,让您更好地理解解决方案。
{ “user”:{ “名字”:“asdf”, “teamname”:“b”, “email”:“c” } }
所以c#看起来像:
public class User
{
public User(string json)
{
JObject jObject = JObject.Parse(json);
JToken jUser = jObject["user"];
name = (string) jUser["name"];
teamname = (string) jUser["teamname"];
email = (string) jUser["email"];
}
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
}
// Use
private void Run()
{
string json = @"{""user"":{""name"":""asdf"",""teamname"":""b"",""email"":""c""}";
User user = new User(json);
Console.WriteLine("Name : " + user.name);
Console.WriteLine("Teamname : " + user.teamname);
Console.WriteLine("Email : " + user.email);
}
答案 1 :(得分:0)
您获得的异常表明您的反序列化存在问题。
我无法分辨你实际做了什么,但如果你试图反序列化整个json对象(即整个文件),你应该明白它不包含Products列表,但是更复杂的类型'等级。因此,这一行失败了:
List<Product> products = JsonConvert.DeserializeObject<List<Product>>(JsonString);
我将列出两个选项,让你的事情发挥作用,选择你觉得更舒服的任何事情。
请注意,我将使用更简洁的json对象。另外,我已经为每个数组添加了另一个对象,以使事情变得更加真实(如在你的文件中)):
{
"unique_image_url_prefixes": [],
"products_and_categories": {
"Tops": [
{
"name": "Top1",
"id": "1"
},
{
"name": "Top2",
"id": "2"
}
],
"Shirts": [
{
"name": "Shirt1",
"id": "3"
},
{
"name": "Shirt2",
"id": "4"
}
]
}
}
选项#1
构建类层次结构
转到链接到的post @CodingYoshi,并使用Visual Studio创建类层次结构。你将获得与以下层次结构非常相似的东西,不过我会更简洁:
public class Rootobject
{
public object[] unique_image_url_prefixes { get; set; }
public Products_And_Categories products_and_categories { get; set; }
}
public class Products_And_Categories
{
public TopsSweaters[] TopsSweaters { get; set; }
public Shirts[] Shirts { get; set; }
}
public class TopsSweaters
{
public string name { get; set; }
public int id { get; set; }
}
public class Shirts
{
public string name { get; set; }
public int id { get; set; }
}
<强> 反序列化 强>
这是你反序列化字符串的方法:
string JsonString = @"{""unique_image_url_prefixes"":[],""products_and_categories"":{""TopsSweaters"":[{""name"":""Top1"",""id"":""1""},{""name"":""Top2"",""id"":""2""}],""Shirts"":[{""name"":""Shirt1"",""id"":""3""},{""name"":""Shirt2"",""id"":""4""}]}}";
Rootobject container = JsonConvert.DeserializeObject<Rootobject>(JsonString);
然后,您可以遍历TopsSweaters
内的每个数组(Shirts
,container.products_and_categories
)。
选项#2
如果您想使用其他类层次结构(例如,您的Product
类),则可以执行以下操作:
构建类层次结构
public class Product
{
[JsonProperty("name")]
public string name { get; set; }
[JsonProperty("id")]
public int id { get; set; }
}
// Choose either one of the following (they function the same):
public class ProductsContainer1
{
[JsonProperty("TopsSweaters")]
public List<Product> ProductsList1 { get; set;}
[JsonProperty("Shirts")]
public List<Product> ProductsList2 { get; set;}
}
public class ProductsContainer2
{
public List<Product> TopsSweaters { get; set; }
public List<Product> Shirts { get; set; }
}
// Choose either one of the following (they function the same):
public class Things1
{
[JsonProperty("unique_image_url_prefixes")]
public object[] Prefixes { get; set;}
[JsonProperty("products_and_categories")]
public ProductsContainer1 Products { get; set;}
}
public class Things2
{
public object[] unique_image_url_prefixes { get; set;}
public ProductsContainer2 products_and_categories { get; set;}
}
<强> 反序列化 强>
反序列化如下:
string JsonString = @"{""unique_image_url_prefixes"":[],""products_and_categories"":{""TopsSweaters"":[{""name"":""Top1"",""id"":""1""},{""name"":""Top2"",""id"":""2""}],""Shirts"":[{""name"":""Shirt1"",""id"":""3""},{""name"":""Shirt2"",""id"":""4""}]}}";
// Use either one of the following:
Things1 container1 = JsonConvert.DeserializeObject<Things1>(JsonString);
Things2 container2 = JsonConvert.DeserializeObject<Things2>(JsonString);