C# 未使用EntityFramework CodeFirst方法创建数据库
我是Entityframework的新手。我正在尝试使用Entityframework的Codefirst方法创建数据库。我在DAL层中有我的代码:C# 未使用EntityFramework CodeFirst方法创建数据库,c#,entity-framework-6,C#,Entity Framework 6,我是Entityframework的新手。我正在尝试使用Entityframework的Codefirst方法创建数据库。我在DAL层中有我的代码: [Table("Category")] public class Category { [Key] public int CategoryId { get; set; } [Required] [Column(TypeName="varchar")] [StringLength(200)] pub
[Table("Category")]
public class Category
{
[Key]
public int CategoryId { get; set; }
[Required]
[Column(TypeName="varchar")]
[StringLength(200)]
public string CategoryName { get; set; }
}
public class DatabaseContext:DbContext
{
public DatabaseContext()
: base("DbConnection")
{
//Added the following but still it doesnt work
//Database.SetInitializer<DatabaseContext>(new CreateDatabaseIfNotExists<DatabaseContext>());
}
public DbSet<Category> Categories { get; set; }
}
[表格(“类别”)]
公共类类别
{
[关键]
public int CategoryId{get;set;}
[必需]
[列(TypeName=“varchar”)]
[长度(200)]
公共字符串CategoryName{get;set;}
}
公共类DatabaseContext:DbContext
{
公共数据库上下文()
:base(“DbConnection”)
{
//添加了以下内容,但仍然不起作用
//SetInitializer(新的CreateDatabaseIfNotExists());
}
公共数据库集类别{get;set;}
}
DAL层的App.Config文件中的连接字符串
<connectionStrings>
<add name="DbConnection"
connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=dbPdtCgry;uid=admin;password=admin123;"
providerName="System.Data.SqlClient"></add>
这不会在Sql server管理中创建数据库。但是,DbConnection Log file&mdf file
是在App_数据中创建的,我可以添加、更新和删除数据
我在这里遗漏了什么吗???可能是您在连接字符串中遗漏了Server=localhost\SQLserverInstanceName,因为DB是在您的应用程序数据上创建的,但不是在您的SQL Server的默认文件夹中创建的我总是这样一步一步地播种,然后我知道我没有遗漏任何东西
<connectionStrings>
<add name="LibraryDb" connectionString="Data Source=(localdb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\LibraryDb.mdf;Integrated Security=True; MultipleActiveResultSets=True;" providerName="System.Data.SqlClient" />
</connectionStrings>
否则,将不会为任何数据设定种子
希望有帮助谢谢设置
Server=localhost\SQLserverInstanceName
解决了这个问题
public class Author
{
[Key]
public int id { get; set; }
[Required(ErrorMessage = "You Need to Enter A Author Name ")]
public string AuthorName { get; set; }
public string Address { get; set; }
public virtual List<book> books{ get; set; }
}
public class Book
{
public int id { get; set; }
public string BookName { get; set; }
[DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}")]
public DateTime DateofPublish { get; set; }
public int id { get; set; }
public virtual Author Author{ get; set; }
}
public class LibraryDb: DbContext
{
public DbSet<Author> Authors{ get; set; }
public DbSet<Book> Books{ get; set; }
public LibraryDb() : base("LibraryDb") { }
}
public class LibraryInitiliser:DropCreateDatabaseAlways<LibraryDb>
{
protected override void Seed(LibraryDb context)
{
var book= new List<Author>
{
new Author() { AuthorName = "Naame1", Address = "dublin", Book= new List<Book>
{
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") },
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") },
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") }
} },
new Author() { AuthorName = "Naame1", Address = "dublin", Book= new List<Book>
{
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") },
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") },
new Book() { BookName = "Naae1", PublishDate= DateTime.Parse("01/02/1981") }
} },
} }
};
book.ForEach(m => context.Library.Add(m));
context.SaveChanges();
base.Seed(context);
}
}
Database.SetInitializer(new LandLordInitiliser());