entity framework core 2.0 & sqlite 配置教程

我用的是vs2017，需要下载.net core 2.0 sdk。

.net core 下载地址：点我下载

1.在Visual Studio之中创建一个.net core的控制台项目

2.修改csproj项目文件，注意添加 DotNetCliToolReference 节点，此节点为添加ef工具，不添加此节点无法使用dotnet ef系列命令

<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp2.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.0.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
</ItemGroup>
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
</ItemGroup>
</Project>

3.这是我的Programs.cs文件，循环输入字符串添加到数据库表中

using System;
using Microsoft.EntityFrameworkCore;
using Microsoft.Data.Sqlite;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;

namespace EfCore2Learn
{
class User
{
[Key, DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int Id { set; get; }

[MaxLength(50), Required]
public string Name { set; get; }
}

class MyContext : DbContext
{
public DbSet<User> Set_User { set; get; }

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
string cntString = "Data Source=MyTestDb.db";
optionsBuilder.UseSqlite(cntString);
}
}

class APP
{
public APP()
{
string inputStr = "";
inputStr = Console.ReadLine();
while (inputStr != "quit")
{
using (MyContext Db = new MyContext())
{
User iUser = new User();
iUser.Name = inputStr;
Db.Set_User.Add(iUser);
Db.SaveChanges();
}

inputStr = Console.ReadLine();
}
}
}

class Program
{
static void Main(string[] args)
{
APP App = new APP();
}
}
}

4.在项目目录下打开cmd（我这里是PowerShell）分别输入以下命令

dotnet restore

dotnet dotnet ef migrations add InitialCreate

dotnet ef database update

dotnet build

dotnet run



成功了，其实很简单，目前我配置好了SqlServer和Sqlite，但是MySql没有配置好，折腾了一天

这里是项目文件下载地址：点我下载项目文件