Entity Framework 将几何转换为地理

Question

我试图通过实体 class 在我的数据库中插入几何对象，但总是出现错误“地理与几何不兼容”returns。我最初收到一个传递几何坐标的 X 和 Y 值的字符串，并进行必要的转换以创建 Geometry 提供的 Point 类型，我不需要进行任何计算，因此 Geometry 类型最适合我现在使用。我使用下面的函数进行转换：

public static Geometry ConvertToGeometry(string coordinatesAux)
{
    if(coordinatesAux == null)
        throw new NullReferenceException();

    NumberFormatInfo formatProvider = new NumberFormatInfo();
    formatProvider.NumberGroupSeparator = ".";
        
    var geometryFactory = NtsGeometryServices.Instance.CreateGeometryFactory(srid: 4326);
    var currentLocation = geometryFactory.CreatePoint(new Coordinate(
                                                           Convert.ToDouble(coordinatesAux.Substring(0, coordinatesAux.IndexOf(",")), formatProvider), 
                                                           Convert.ToDouble(coordinatesAux.Substring(coordinatesAux.IndexOf(",") + 1), formatProvider)));
        
    return currentLocation;                                                            
}

我还在 Startup.cs 中对 db 进行了必要的修改以使用 NetTopologySuite，但是当我尝试通过 API 插入值时，它 returns 出现了最初描述的错误。我不知道问题是否出在我从字符串转换为几何的方式上，或者是否是实体本身将字段识别为地理点。

我尝试传递的值是 -20.338113、-40.287893 和我使用的实体 class：

public class Address : EntityBase<int>
{
    public Address(string district, string street, int number, string complement, string zipCode, 
    string cityDescription, string stateDescription, Geometry coordinates, int countryId, byte stateId, int cityId)
    {
        District = district;
        Street = street;
        Number = number;
        Complement = complement;
        ZipCode = zipCode;
        CityDescription = cityDescription;
        StateDescription = stateDescription;
        Coordinates = coordinates;
        CountryId = countryId;
        StateId = stateId;
        CityId = cityId;
    }

    public string District { get; set; }
    public string Street { get; set; }
    public int Number { get; set; }
    public string Complement { get; set; }
    public string ZipCode { get; set; }
    public string CityDescription { get; set; }
    public string StateDescription { get; set; }
    public virtual Geometry Coordinates { get; set; }
    public int CountryId { get; set; }
    public byte StateId { get; set; }
    public int CityId { get; set; }
    public int? CustomerId { get; set; }
    public int? StoreId { get; set; }
    public int? ProfessionalId { get; set; }
}

所以，再问一遍，是Entity framework做的还是我做错了？如果需要更多的代码部分，我会编辑问题来添加。

编辑 1

Table 地址：

CREATE TABLE Address(
    Id INT PRIMARY KEY IDENTITY(1, 1),
    District VARCHAR(50) NOT NULL, -- Bairro
    Street VARCHAR(100) NOT NULL, -- Rua
    --Description VARCHAR(100) NOT NULL,
    Number INT,
    Complement VARCHAR(100),
    ZipCode VARCHAR(20) NOT NULL,
    CityDescription VARCHAR(100),
    StateDescription VARCHAR(100),
    Coordinates GEOMETRY,
    
    CountryId INT FOREIGN KEY REFERENCES Country(Id) NOT NULL,
    StateId TINYINT FOREIGN KEY REFERENCES State(Id),
    CityId INT FOREIGN KEY REFERENCES City(Id),
    CustomerId INT FOREIGN KEY REFERENCES Customer(Id),
    StoreId INT FOREIGN KEY REFERENCES Store(Id),
    ProfessionalId INT FOREIGN KEY REFERENCES Professional(Id),

    INDEX IndexAddressCountryId NONCLUSTERED (CountryId),
    INDEX IndexAddressStateId NONCLUSTERED (StateId),
    INDEX IndexAddressCityId NONCLUSTERED (CityId),
    INDEX IndexAddressCustomerId NONCLUSTERED (CustomerId),
    INDEX IndexAddressStoreId NONCLUSTERED (StoreId),
    INDEX IndexAddressProfessionalId NONCLUSTERED (ProfessionalId)
)

Answer 1

这是一个工作正常的示例，映射到 geometry 或 geography。你必须看看你在做什么不同。（顺便说一句，您可能想要 geography，因为 geometry in SQL 服务器是平面欧几里德 space，并且不会为您提供准确的距离计算或纬度和坐标的直线经度）。

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Common;
using System.Linq;
using System.Security.Cryptography;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using NetTopologySuite.Geometries;


namespace EfCore3Test
{

    public class Address : EntityBase<int>
    {
        public Address() { }
        public Address(string district, string street, int number, string complement, string zipCode,
        string cityDescription, string stateDescription, Geometry coordinates, int countryId, byte stateId, int cityId)
        {
            District = district;
            Street = street;
            Number = number;
            Complement = complement;
            ZipCode = zipCode;
            CityDescription = cityDescription;
            StateDescription = stateDescription;
            Coordinates = coordinates;
            CountryId = countryId;
            StateId = stateId;
            CityId = cityId;
        }

        public string District { get; set; }
        public string Street { get; set; }
        public int Number { get; set; }
        public string Complement { get; set; }
        public string ZipCode { get; set; }
        public string CityDescription { get; set; }
        public string StateDescription { get; set; }

        //[Column(TypeName ="geometry")]
        public virtual Geometry Coordinates { get; set; }
        public int CountryId { get; set; }
        public byte StateId { get; set; }
        public int CityId { get; set; }
        public int? CustomerId { get; set; }
        public int? StoreId { get; set; }
        public int? ProfessionalId { get; set; }
    }

    public class EntityBase<T>
    {
        public T Id { get; set; }
    }

    public class Db : DbContext
    {
           
        public Db(): base()
        {

        }

        private static readonly ILoggerFactory loggerFactory = LoggerFactory.Create(builder =>
        {
            builder.AddFilter((category, level) =>
               category == DbLoggerCategory.Database.Command.Name
               && level == LogLevel.Information).AddConsole();
        });
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            var constr = "Server = localhost; database = efcore3test; integrated security = true";
            optionsBuilder.UseLoggerFactory(loggerFactory)
                          .UseSqlServer(constr, o => o.UseRelationalNulls().UseNetTopologySuite());


            base.OnConfiguring(optionsBuilder);
        }

        public DbSet<Address> Addresses { get; set; }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
        }

    }




    class Program
    {


    static void Main(string[] args)
        {
 

            using (var db = new Db())
            {

                db.Database.EnsureDeleted();
                db.Database.EnsureCreated();

                var geometryFactory = NetTopologySuite.NtsGeometryServices.Instance.CreateGeometryFactory(srid: 4326);
                var currentLocation = geometryFactory.CreatePoint(new NetTopologySuite.Geometries.Coordinate(-122.121512, 47.6739882));

                var addr = new Address("a", "a", 1, "a", "00223", "city", "state", currentLocation, 1, 2, 3);

                db.Addresses.Add(addr);

                db.SaveChanges();

            }

        }
    }

}

Entity Framework 将几何转换为地理

Entity Framework converting Geometry into Geography

c#

entity-framework

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rdbms

ef-core-3.1