小编Jaa*_*aan的帖子

我是Entity Framework 6的新手,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

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 => …

我有一个ViewModel,它由三个实体连接起来,将所有实体的数据转换为一个视图形式.虽然我成功实现了同样的目标.但我不知道如何编辑和保存数据回数据库.我的模型类由一对一的关系加入.

我的模特是:

public class Doctor
{
    public int DoctorId { get; set; }
    public string Name { get; set; }
    public string Speciality { get; set; }

    public virtual DoctorAddress DoctorAddress { get; set; }
    public virtual DoctorCharge DoctorCharge { get; set; }
    public virtual DoctorAvailablity DoctorAvailablity { get; set; }

}

public class DoctorAddress
{
    public string Address { get; set; }
    public string City { get; set; }
    public int DoctorId { get; set; }

    public virtual Doctor …

我已经构建了一个查询来从两个表中返回数据,在这两个表中,它们通过内连接加入.虽然,因为查询似乎很好,当我尝试从查询中访问选定的字段名称时,我收到错误消息.我如何在此查询中使用.SingleOrDefault()函数.任何人都可以帮我,我该怎么办.

private void FindByPincode(int iPincode)
    {
        using (ABCEntities ctx = new ABCEntities())
        {
            var query = from c in ctx.Cities
                        join s in ctx.States
                        on c.StateId equals s.StateId
                        where c.Pincode == iPincode
                        select new {
                                s.StateName, 
                                c.CityName, 
                                c.Area};

            // var query = ctx.Cities.AsNoTracking().SingleOrDefault(_city => _city.Pincode == iPincode);

            if (query != null)
            {
                cboState.SelectedItem.Text =query.State;        //Getting error "Could not found"
                cboCity.SelectedItem.Text = query.CityName;     //Getting error "Could not found"
                txtArea.Text = query.Area;                        //Getting error "Could not found"

            }

        }
    }

提前致谢.

我有一个主表名称table1,我mobileNo每天存储或更新数据一个月.

;WITH table1 AS (SELECT * FROM (VALUES
(9999999999, '01/10/2013', NULL, NULL, NULL, NULL),
(9999999999, NULL, '02/10/2013', NULL, NULL, NULL),
(9999999999, NULL, NULL, '03/10/2013', NULL, NULL),
(9999999999, NULL, NULL, NULL, '04/10/2013', NULL),
(9999999999, NULL, NULL, NULL, NULL, '30/10/2013'),
(9999999999, NULL, NULL, NULL, NULL, NULL),
(8888888888, '01/10/2013', NULL, NULL, NULL, NULL),
(8888888888, NULL, '02/10/2013', NULL, NULL, NULL),
(8888888888, NULL, NULL, '03/10/2013', NULL, NULL),
(8888888888, NULL, NULL, NULL, '04/10/2013', NULL),
(8888888888, NULL, NULL, NULL, NULL, '30/10/2013')) 
as t(mobileno,date1,date2,date3,date4,date30)) …

我有下面给出的代码。我正在尝试将其转换为列表数组。

  string str = "1,2,3,4,5,6,7";
  var newstring = new int[] {str};   //Cannot implicitly convert type 'string' to 'int'

请帮我。提前谢谢。