如何在实体框架6中调用存储过程(代码优先)?

我对实体框架6非常陌生，我想在我的项目中实现存储过程。我有一个存储过程如下:

ALTER PROCEDURE [dbo].[insert_department]
    @Name [varchar](100)
AS
BEGIN
    INSERT [dbo].[Departments]([Name])
    VALUES (@Name)

    DECLARE @DeptId int

    SELECT @DeptId = [DeptId]
    FROM [dbo].[Departments]
    WHERE @@ROWCOUNT > 0 AND [DeptId] = SCOPE_IDENTITY()

    SELECT t0.[DeptId]
    FROM [dbo].[Departments] AS t0
    WHERE @@ROWCOUNT > 0 AND t0.[DeptId] = @DeptId
END

系类:

public class Department
{
    public int DepartmentId { get; set; }       
    public string Name { get; set; }
}

modelBuilder 
.Entity<Department>() 
.MapToStoredProcedures(s => 
s.Update(u => u.HasName("modify_department") 
               .Parameter(b => b.Department, "department_id") 
               .Parameter(b => b.Name, "department_name")) 
 .Delete(d => d.HasName("delete_department") 
               .Parameter(b => b.DepartmentId, "department_id")) 
 .Insert(i => i.HasName("insert_department") 
               .Parameter(b => b.Name, "department_name")));

protected void btnSave_Click(object sender, EventArgs e)
{
    string department = txtDepartment.text.trim();

    // here I want to call the stored procedure to insert values
}

我的问题是:如何调用存储过程并将参数传递给它?

当前回答

对我来说，这是通过在传递参数时从存储过程中拉回数据来实现的。

var param = new SqlParameter("@datetime", combinedTime);
var result = 
        _db.Database.SqlQuery<QAList>("dbo.GetQAListByDateTime @datetime", param).ToList();

_db是dbContext

2017-02-16 00:50:46

其他回答

这是EF (DB first)在DbContext类中生成的:

public ObjectResult<int> Insert_Department(string department)
{
    var departmentParameter = new ObjectParameter("department", department);

    return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<int>("insert_department", departmentParameter);
}

2017-02-19 19:01:26

我用ExecuteSqlCommand解决了这个问题

把你自己的方法放在DbContext中作为你自己的实例:

public void addmessage(<yourEntity> _msg)
{
    var date = new SqlParameter("@date", _msg.MDate);
    var subject = new SqlParameter("@subject", _msg.MSubject);
    var body = new SqlParameter("@body", _msg.MBody);
    var fid = new SqlParameter("@fid", _msg.FID);
    this.Database.ExecuteSqlCommand("exec messageinsert @Date , @Subject , @Body , @Fid", date,subject,body,fid);
}

所以你可以在你的后台代码中有一个这样的方法:

[WebMethod] //this method is static and i use web method because i call this method from client side
public static void AddMessage(string Date, string Subject, string Body, string Follower, string Department)
{
    try
    {
        using (DBContext reposit = new DBContext())
        {
            msge <yourEntity> Newmsg = new msge();
            Newmsg.MDate = Date;
            Newmsg.MSubject = Subject.Trim();
            Newmsg.MBody = Body.Trim();
            Newmsg.FID= 5;
            reposit.addmessage(Newmsg);
        }
    }
    catch (Exception)
    {
        throw;
    }
}

这是我的SP:

Create PROCEDURE dbo.MessageInsert

    @Date nchar["size"],
    @Subject nchar["size"],
    @Body nchar["size"],
    @Fid int
AS
    insert into Msg (MDate,MSubject,MBody,FID) values (@Date,@Subject,@Body,@Fid)
    RETURN

希望这对你有帮助。

2014-05-07 06:07:27

没什么…当您为代码创建dbcontext时，首先要进行初始化命名空间下面的fluent API区域列出sp和使用它的另一个地方，你想。

public partial class JobScheduleSmsEntities : DbContext
{
    public JobScheduleSmsEntities()
        : base("name=JobScheduleSmsEntities")
    {
        Database.SetInitializer<JobScheduleSmsEntities>(new CreateDatabaseIfNotExists<JobScheduleSmsEntities>());
    }

    public virtual DbSet<Customer> Customers { get; set; }
    public virtual DbSet<ReachargeDetail> ReachargeDetails { get; set; }
    public virtual DbSet<RoleMaster> RoleMasters { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        //modelBuilder.Types().Configure(t => t.MapToStoredProcedures());

        //modelBuilder.Entity<RoleMaster>()
        //     .HasMany(e => e.Customers)
        //     .WithRequired(e => e.RoleMaster)
        //     .HasForeignKey(e => e.RoleID)
        //     .WillCascadeOnDelete(false);
    }
    public virtual List<Sp_CustomerDetails02> Sp_CustomerDetails()
    {
        //return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<Sp_CustomerDetails02>("Sp_CustomerDetails");
        //  this.Database.SqlQuery<Sp_CustomerDetails02>("Sp_CustomerDetails");
        using (JobScheduleSmsEntities db = new JobScheduleSmsEntities())
        {
           return db.Database.SqlQuery<Sp_CustomerDetails02>("Sp_CustomerDetails").ToList();

        }

    }

}

}

public partial class Sp_CustomerDetails02
{
    public long? ID { get; set; }
    public string Name { get; set; }
    public string CustomerID { get; set; }
    public long? CustID { get; set; }
    public long? Customer_ID { get; set; }
    public decimal? Amount { get; set; }
    public DateTime? StartDate { get; set; }
    public DateTime? EndDate { get; set; }
    public int? CountDay { get; set; }
    public int? EndDateCountDay { get; set; }
    public DateTime? RenewDate { get; set; }
    public bool? IsSMS { get; set; }
    public bool? IsActive { get; set; }
    public string Contact { get; set; }
}

2019-04-16 13:46:28

您正在使用MapToStoredProcedures()，这表明您正在将实体映射到存储过程，在执行此操作时，您需要放弃存在存储过程的事实，并正常使用上下文。像这样(写入浏览器，所以没有测试)

using(MyContext context = new MyContext())
{
    Department department = new Department()
    {
        Name = txtDepartment.text.trim()
    };
    context.Set<Department>().Add(department);
}

如果你真正想做的只是直接调用存储过程，那么使用SqlQuery

2014-01-03 14:12:49

它为我工作在代码第一。它返回一个匹配视图模型属性的列表(StudentChapterCompletionViewModel)

var studentIdParameter = new SqlParameter
{
     ParameterName = "studentId",
     Direction = ParameterDirection.Input,
     SqlDbType = SqlDbType.BigInt,
     Value = studentId
 };

 var results = Context.Database.SqlQuery<StudentChapterCompletionViewModel>(
                "exec dbo.sp_StudentComplettion @studentId",
                 studentIdParameter
                ).ToList();

已更新

Context是继承DbContext类的实例，如下所示。

public class ApplicationDbContext : DbContext
{
    public DbSet<City> City { get; set; }
}

var Context = new  ApplicationDbContext();

2017-12-19 08:37:39

如何在实体框架6中调用存储过程(代码优先)?

推荐文章

最新文章

标签