我正在使用 web api 進行練習。我的目標是創建一個 Get 端點，它從外部 api 接收資料，然后回傳不同的結果。外部api鏈接：https ://www.themealdb.com/api/json/v1/1/search.php?f=a ，外部api資料如下：
{
"meals": [
{
"idMeal": "52768",
"strMeal": "Apple Frangipan Tart",
"strDrinkAlternate": null,
"strCategory": "Dessert",
.....
},
{
"idMeal": "52893",
"strMeal": "Apple & Blackberry Crumble",
....
}
]
}
我希望我的端點提供不同的結果，如下所示：
[
{
"idMeal": "52768",
"strMeal": "Apple Frangipan Tart",
"ingredients": ["Apple", "sugar"...]
},
{
"idMeal": "52893",
"strMeal": "Apple & Blackberry Crumble",
"ingredients": ["Apple", "sugar"...]
}
]
以下代碼是我到目前為止所嘗試的，它正在作業，但是當我將屬性成分1從公共更改為私有時，串列中的成分將變為空，而且成分很多，其中一些默認為空，我如果它們為空，不想添加它們，我該如何解決這兩個問題？非常感謝
using System.Text.Json;
using System.Text.Json.Serialization;
using Microsoft.AspNetCore.Mvc;
using RestSharp;
namespace testAPI.Controllers;
public class Content
{
[JsonPropertyName("meals")]
public List<Meal> Meals { get; set; }
}
public class Meal
{
[JsonPropertyName("idMeal")]
public string MealId { get; set; }
[JsonPropertyName("strMeal")]
public string Name { get; set; }
[JsonPropertyName("strIngredient1")]
public string Ingredient1 { get; set; }
[JsonPropertyName("strIngredient2")]
public string Ingredient2 { get; set; }
[JsonPropertyName("strIngredient20")]
public string Ingredient20 { get; set; }
public List<string> Ingredients
{
get { return new List<string>(){Ingredient1, Ingredient2, Ingredient20};}
}
}
[ApiController]
[Route("api/[controller]")]
public class DishesController : ControllerBase
{
[HttpGet]
public async Task<IActionResult> GetAllRecipes()
{
var client = new RestClient($"https://www.themealdb.com/api/json/v1/1/search.php?s=");
var request = new RestRequest();
var response = await client.ExecuteAsync(request);
var mealList = JsonSerializer.Deserialize<Content>(response.Content);
return Ok(mealList.Meals);
}
}
uj5u.com熱心網友回復：
一次解決一個問題...
當我將屬性成分 1 從公共更改為私有時，串列中的該成分將變為空
更改訪問修飾符會影響反序列化和序列化，因此不能僅用于阻止它序列化屬性。您應該將資料模型拆分為您想要接收的內容和想要公開/回傳的內容。
成分太多了，有的默認為null，為null的我不想加
除了拆分資料模型之外，您還可以在從一個模型映射到另一個模型時處理此問題。
以下代碼應解決這兩個問題：
namespace TheMealDb.Models
{
// These are the models you receive from TheMealDb
// JSON converted to classes with https://json2csharp.com/
public class Root
{
public List<Meal> meals { get; set; }
}
public class Meal
{
public string idMeal { get; set; }
public string strMeal { get; set; }
public string strIngredient1 { get; set; }
public string strIngredient2 { get; set; }
public string strIngredient3 { get; set; }
// Other properties removed for brevity...
}
}
namespace Internal.Models
{
// This is the model you want to return from your controller action
public class Meal
{
[JsonPropertyName("id")] // No need to use the same name as from themealdb
public string Id { get; set; }
[JsonPropertyName("name")]
public string Name { get; set; }
[JsonPropertyName("ingredients")]
public List<string> Ingredients { get; set; }
}
}
現在，要在控制器操作中獲取、映射和回傳資料：
[HttpGet]
public async Task<IActionResult> GetAllRecipes()
{
var client = new RestClient($"https://www.themealdb.com/api/json/v1/1/search.php?s=");
var request = new RestRequest();
var response = await client.ExecuteAsync(request);
// Deserialize to the "TheMealDb" models
var mealList = JsonSerializer.Deserialize<TheMealDb.Models.Root>(response.Content);
// Map to your own models
var myMealList = mealDbList.meals?.Select(MapToInternal);
return Ok(myMealList);
}
// Map "TheMealDb" model to your own model
private Internal.Models.Meal MapToInternal(TheMealDb.Models.Meal externalMeal)
{
return new Internal.Models.Meal
{
Id = externalMeal.idMeal,
Name = externalMeal.strMeal,
Ingredients = new []
{
externalMeal.strIngredient1,
externalMeal.strIngredient2,
externalMeal.strIngredient3,
// ...
}
// Remove empty/null ingredients
.Where(ingr => !string.IsNullOrEmpty(ingr))
.ToList()
};
}
請參閱實際代碼。
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標籤：C＃ 。网 asp.net-web-api 序列化