如何使用 MySQL EntityFramework 组件处理 MYSQL PaaS DB

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MySQL Database on Azure 是 Azure 平台上推出的 MySQL 云数据库服务，通过全面兼容 MySQL 协议，为用户提供了一个全托管的性能稳定、可快速部署、高可用、高安全性的数据库服务。客户可以使用常见的支持 MySQL 的平台与技术进行开发与集成。本文演示了如何使用 MySQL EntityFramework 组件对 MySQL PaaS DB 进行操作。

系统环境 / 应用程序信息

ASP.NET 2005 Core / MYSQL EntityFrameWork Core

详细代码

在 VS 2015 Net Core 的环境中，安装 EntityFrameWork Core 组件，代码和测试后结果如下：

其中 Data1Context.cs 文件为：

using Microsoft.EntityFrameworkCore;

using MySQL.Data.EntityFrameworkCore.Extensions;

namespace ConsoleApp1

{

    /// <summary>

    /// The entity framework context with a data1 DbSet

    /// </summary>

    public class Data1Context : DbContext

    {

        public Data1Context(DbContextOptions<Data1Context> options)

        : base(options)

        { }

        public DbSet<Data1> Data1 { get; set; }

    }

    /// <summary>

    /// Factory class for EmployeesContext

    /// </summary>

    public static class Data1ContextFactory

    {

        public static Data1Context Create(string connectionString)

        {

            var optionsBuilder = new DbContextOptionsBuilder<Data1Context>();

            optionsBuilder.UseMySQL(connectionString);

            //Ensure database creation

            var context = new Data1Context(optionsBuilder.Options);

            context.Database.EnsureCreated();

            return context;

        }

    }

    /// <summary>

    /// A basic class for an Employee

    /// </summary>

    public class Data1

    {

        public int Id { get; set; }

        public string Name1 { get; set; }

    }

}

Program.cs 文件为：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

using Microsoft.Extensions.Configuration;

namespace ConsoleApp1

{

    public class Program

    {

        public static void Main(string[] args)

        {

            var builder = new ConfigurationBuilder().AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

            var configuration = builder.Build();

            string connectionString = configuration.GetConnectionString("SampleConnection");

            // Create an employee instance and save the entity to the database

            var entry = new Data1() { Id = , Name1 = "XingBing" };

            using (var context = Data1ContextFactory.Create(connectionString))

            {

                context.Add(entry);

                context.SaveChanges();

            }

            Console.WriteLine($"Data1 was saved in the database with id: {entry.Id}");

            Console.ReadKey();

        }

    }

}

appsettings.json 文件为：

{

    "ConnectionStrings": {

        "SampleConnection": "server=XXXXXX.mysqldb.chinacloudapi.cn;userid=XXXXXX%YYYYYY;pwd=XXXXXXXXX;port=3306;database=xyudb;sslmode=none;"

    }

}

project.json 文件为：

{

    "version": "1.0.0-*",

    "buildOptions": {

        "debugType": "portable",

        "emitEntryPoint": true,

        "copyToOutput": {

        "include": "appsettings.json"

        }

    },

    "dependencies": {

        "Microsoft.Extensions.Configuration": "1.0.0",

        "Microsoft.Extensions.Configuration.Json": "1.0.0",

        "Microsoft.EntityFrameworkCore": "1.0.0",

        "MySql.Data.Core": "7.0.4-IR-191",

        "MySql.Data.EntityFrameworkCore": "7.0.4-IR-191"

    },

    "frameworks": {

        "netcoreapp1.0": {

            "dependencies": {

                "Microsoft.NETCore.App": {

                "type": "platform",

                "version": "1.0.0"

                }

            },

            "imports": [

                "dnxcore50",

                "portable-net452+win81"

            ]

        }

    }

}