如何获取字典列表中与同一键关联的所有值？

Question

我有一个 Class 看起来像这样

public class VegetablesPriceNode
{
 public string Country{get;set;}
 public Dictionary<string,string> VegetableDictionary{get;set;}
}

然后我以列表的形式获取每个 Individual VegetablesPriceNode

List<VegetablesPriceNode> = //I get this object after parsing.

所有 VegetableDictionary 中都有相同的键，但针对不同的国家/地区，我需要将其水平显示。

Veggies   Afghanistan.   Bahrain
-------------------------------------------------------------------------
Onions  | .00       |  .00  ....
Potatoes| .00       |  .50  ....
.......

public static void Main()
{
   // I get a List<VegetablesPriceNode> from some place
   // Need to extract all values for the same key from all dictionaries 
   
   // I tried to extract all keys first using 
   var  = vegetablesPriceNodeList.SelectMany(x => x.VegetableDictionary.Select(x => x.Key)).ToHashSet();

   // I chose HashSet because all keys were getting appended and there is no unique.

}

如何遍历所有国家/地区的所有词典来提取相同的关键信息？例如，我想要所有国家/地区的所有洋葱价格。所以循环遍历所有字典，以 Onions 为键并获取它们的值？

上述先提取键然后获取该键的所有值的方法是否理想？或者有更好的解决方案吗？

因为我使用 DataTable 来存储这些信息 DataTable 使用对象[] 我得到的对象是 List

预计：看起来像

的字符串值列表

"Onions",".00",".00"

示例数据：

[{"Country":"Afghanistan","VegetableDictionary":{"Onions":".00","Potatoes":".40"}},{"Country":"Bahrain","VegetableDictionary":{"Onions":".00","Potatoes":".40"}}]

Answer 1

我不知道你想要的输出是什么。

我相信类似的东西：

[["Onions",".00",".00"],["Potatoes",".40",".40"]]

我做了一个例子，希望它对你的用例有用：

https://dotnetfiddle.net/RPFZen

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;

public class VegetablesPriceNode
{
    public string Country { get; set; }
    public Dictionary<string, string> VegetableDictionary { get; set; }
}

public class Program
{
    public static void Main()
    {
        var json = "[{\"Country\":\"Afghanistan\",\"VegetableDictionary\":{\"Onions\":\".00\",\"Potatoes\":\".40\"}},{\"Country\":\"Bahrain\",\"VegetableDictionary\":{\"Onions\":\".00\",\"Potatoes\":\".40\"}}]";

        var vegetablesPriceNodeList = JsonConvert.DeserializeObject<List<VegetablesPriceNode>>(json);

        var obj = vegetablesPriceNodeList
            .SelectMany(x =>
                x.VegetableDictionary
                    .Select(x => x.Key)
            )
            .Distinct()
            .Select((k) =>
                vegetablesPriceNodeList
                    .Select(v => v.VegetableDictionary[k])
                    .Prepend(k)
                    .ToArray()
            ).ToArray();

        var output = JsonConvert.SerializeObject(obj);
        
        Console.WriteLine(output);
    }
}

如何获取字典列表中与同一键关联的所有值？

How to get all values associated with the same key in a list of dictionaries?

c#

linq