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如何在Entity Framework 6（Code-First）中调用存储过程？

c#entity-frameworkstored-procedures
304

我对Entity Framework 6非常陌生，并且希望在我的项目中实现存储过程。我有以下存储过程：

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

Department 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向其中传递参数？

我也对此很感兴趣。理想情况下，我会完全跳过EF，而只通过存储过程运行一切。虽然我是SQL专家，但我发现实现EF非常令人沮丧。 - David Britz
22个回答
0

在MySQL中创建存储过程。

delimiter //
create procedure SP_Dasboarddata(fromdate date, todate date)
begin
select count(Id) as count,date,status,sum(amount) as amount from 
details
where (Emidate between fromdate and todate)
group by date ,status;
END;
//

创建一个包含存储过程返回结果集值的类

[Table("SP_reslutclass")]
public  class SP_reslutclass
{
    [Key]
    public int emicount { get; set; }
    public DateTime Emidate { get; set; }
    public int ? Emistatus { get; set; }
    public int emiamount { get; set; }

}

在 Dbcontext 中添加类

  public  class ABCDbContext:DbContext
{
    public ABCDbContext(DbContextOptions<ABCDbContext> options)
       : base(options)
    {

    }

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

调用存储库中的实体

   var counts = _Dbcontext.SP_reslutclass.FromSql("call SP_Dasboarddata 
                    ('2019-12-03','2019-12-31')").ToList();
0

使用MySql和Entity Framework的Code First方法：

public class Vw_EMIcount
{
    public int EmiCount { get; set; }
    public string Satus { get; set; }
}

var result = context.Database.SqlQuery<Vw_EMIcount>("call EMIStatus('2018-3-01' ,'2019-05-30')").ToList();
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