GeoJson c#示例解析世界上的国家并为每个国家生成Geojson

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

public class Country
{
    public string Name { get; set; }
    public string Code { get; set; }
    public string GeoJson { get; set; }
}

public class GeoJsonParser
{
    public static List<Country> ParseCountries(string filePath)
    {
        List<Country> countries = new List<Country>();

        // 读取GeoJSON文件内容
        string json = File.ReadAllText(filePath);

        // 解析JSON数据
        JObject geoJson = JObject.Parse(json);

        // 获取features数组
        JArray features = (JArray)geoJson["features"];

        // 遍历features数组
        foreach (JObject feature in features)
        {
            // 获取国家名称和代码
            string name = (string)feature["properties"]["name"];
            string code = (string)feature["properties"]["iso_a2"];

            // 获取GeoJSON数据
            string geoJsonData = feature.ToString();

            // 创建Country对象并添加到列表中
            Country country = new Country
            {
                Name = name,
                Code = code,
                GeoJson = geoJsonData
            };
            countries.Add(country);
        }

        return countries;
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        string filePath = "world_countries.geojson";

        List<Country> countries = GeoJsonParser.ParseCountries(filePath);

        foreach (Country country in countries)
        {
            Console.WriteLine("Country: " + country.Name);
            Console.WriteLine("Code: " + country.Code);
            Console.WriteLine("GeoJSON: " + country.GeoJson);
            Console.WriteLine();
        }
    }
}