.Net Core-类库中创建CodeFirst

2.在类库项目中 添加实体模型和数据上下文

public class TopBaseModel
{
private Guid _id;
public Guid ID {
get {
if (_id == Guid.Empty) {
_id = Guid.NewGuid();
}
return _id;
}
set {
_id = value;
}
}
}
using System.ComponentModel.DataAnnotations;
public class BaseModel:TopBaseModel
{
[Display(Name ="创建时间")]
public DateTime? CreateTime { get; set; }
[Display(Name ="创建人")]
[StringLength(, ErrorMessage = "{0}最多输入{1}个字符")]
public string CreateBy { get; set; }
[Display(Name = "修改时间")]
public DateTime? UpdateTime { get; set; }
[Display(Name = "修改人")]
[StringLength(, ErrorMessage = "{0}最多输入{1}个字符")]
public string UpdateBy { get; set; }
}
Frame_User实体模型,继承BaseModel
using System.ComponentModel.DataAnnotations;
public class Frame_User:BaseModel
{
[Display(Name ="用户")]
[StringLength(, ErrorMessage = "{0}最多输入{1}个字符")]
public string UserName { get; set; }
[Display(Name = "角色名")]
[StringLength(, ErrorMessage = "{0}最多输入{1}个字符")]
public string RoleName { get; set; }
}
ERPFrameDBContext数据上下文
public class ERPFrameDBContext : DbContext
{
public ERPFrameDBContext(DbContextOptions<ERPFrameDBContext> options) : base(options)
{
} public DbSet<Frame_User> Frame_User { get; set; }
}
3. 项目文件配置
(1)“appsettings.json”添加配置项,数据库连接字符串
"ConnectionStrings": {
"todoContext": "Server=.;DataBase=ERPFrame;uid=sa;pwd=123456"
},

services.AddDbContext<ERPFrameDBContext>(opt => opt.UseSqlServer(Configuration.GetConnectionString("todoContext")));
如上所有配置完成后,重新编译成功后,在控制台进行数据库迁移 :
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" 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