C# Sqlite EntityFramewor6 CodeFist 使用

1.基础配置

1.1 Nuget 引用

- EntityFramework
- System.Data.SQLite
- SQLite.CodeFirst

1.2 配置文件

引用Nuget 后在App.config 中添加sqlite db 的链接字符串

添加的配置文件

 <connectionStrings>
	<add name="localdb" connectionString="data source=.\db\localdb.db;Version=3;foreign keys=true" providerName="System.Data.SQLite" />
</connectionStrings>

<!--添加 provider-->
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />

2 CodeFist 代码

2.1 实体创建

public class LocalPerson
{
    [Key]//主键
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]//ID 自增长
    public int ID { get; set; }

    public string Name { get; set; }

    public int Sex { get; set; }
}

2.2 数据库初始化数据库重写

public class LocalDbInitializer : SqliteDropCreateDatabaseWhenModelChanges<SqliteDBContext>
{
    public LocalDbInitializer(DbModelBuilder modelBuilder) : base(modelBuilder)
    {
    }

    protected override void Seed(SqliteDBContext context)
    {
        //初始参数
        context.LocalPerson.Add(new Entity.LocalPerson
        {
            Name = "初始化测试",
            Sex = 1
        });
        context.SaveChanges();

        base.Seed(context);
    }
}

2.3 数据库上下文 SqliteDBContext

public class SqliteDBContext : DbContext
{
    public SqliteDBContext() : base("name = localdb")
    {
        Configuration.ProxyCreationEnabled = false;
        Configuration.LazyLoadingEnabled = false;
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        Database.SetInitializer(new LocalDbInitializer(modelBuilder));
    }

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

2.4 EF 调用代码

using (var db = new SqliteDBContext())
{
    //查看初始化数据
    Console.WriteLine(db.LocalPerson.ToList().ToJson());

    //添加数据
    db.LocalPerson.Add(new LocalPerson()
    {
        Name = "测试添加",
        Sex = 2
    });
    db.SaveChanges();

    //查看总数据
    Console.WriteLine(db.LocalPerson.ToList().ToJson());
}

执行结果：

至此C#Sqlite EntityFramework CodeFist 的使用已完成

本文代码已上传：https://download.csdn.net/download/johnson55925/10789217

项目开源地址：
https://gitee.com/fcode_me/FCODE_DEMO