如何使用 MySQL EntityFramework 組件處理 MYSQL PaaS DB

MySQL Database on Azure 是 Azure 平臺上推出的 MySQL 雲資料庫服務，通過全面相容 MySQL 協議，為用戶提供了一個全托管的性能穩定、可快速部署、高可用、高安全性的資料庫服務。客戶可以使用常見的支持 MySQL 的平臺與技術進行開發與集成。本文演示瞭如何使用 MySQL EntityFramework 組件對 MySQL PaaS DB 進行操作。

系統環境 / 應用程式信息

ASP.NET 2005 Core / MYSQL EntityFrameWork Core

詳細代碼

在 VS 2015 Net Core 的環境中，安裝 EntityFrameWork Core 組件，代碼和測試後結果如下：

其中 Data1Context.cs 文件為：

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 文件為：

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 = 3, 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 文件為：

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

project.json 文件為：

{
    "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"
            ]
        }
    }
}

項目組成

運行及測試結果

組件地址

MySql.Data.EntityFrameworkCore 7.0.7-m61

參考方法

MySQL EF Core provider and Connector/Net 7.0.4 入門教程

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