Linq to Entities Insert, Delete on Foreign key relation

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HI

I have problem to insert records on table through linq to entities, where two tables are connected with foreign key.

My first table is

SQL

CREATE TABLE [dbo].[Emp](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[EmpName] [varchar](50) NULL,
 CONSTRAINT [PK_Emp] PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

and second table is

SQL

CREATE TABLE [dbo].[EMpSecond](
	[Id] [int] NOT NULL,
	[EmpAge] [int] NULL
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[EMpSecond]  WITH CHECK ADD FOREIGN KEY([Id])
REFERENCES [dbo].[Emp] ([Id])

my insertion C# code is

C#

Emp emp = new Emp();
            emp.EmpName = txtName.Text;
            emp.Id = Convert.ToInt32(txtId.Text);

            EMpSecond sec = new EMpSecond();
            sec.EmpAge = Convert.ToInt32(txtAge.Text);
            sec.Id = Convert.ToInt32(txtId.Text);
            //sec.Emp.Id = emp.Id;

            using (TestEntities testEntities = new TestEntities())
            {
                testEntities.AddToEmps(emp);
                testEntities.SaveChanges();

                testEntities.AddToEMpSeconds(sec);
                testEntities.SaveChanges();
            }

please give me solution, its urgent

Posted 22-Nov-13 6:21am

Dharmendra-18

Updated 22-Nov-13 6:22am

v2

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Comments

MTProgrammer 22-Nov-13 17:04pm

Would be nice if you stated what the outcome of your existing code is/does...

1 solution

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MTProgrammer · Answer 1 · 2013-11-22T11:06:00

Emp emp = new Emp();
            emp.EmpName = txtName.Text;
            emp.Id = Convert.ToInt32(txtId.Text); // this should not be user enterable, ID's are generated by DB
 
            EMpSecond sec = new EMpSecond();
            sec.EmpAge = Convert.ToInt32(txtAge.Text);
            sec.Id = Convert.ToInt32(txtId.Text);
            //sec.Emp.Id = emp.Id;

            using (TestEntities testEntities = new TestEntities())
            {
                testEntities.AddToEmps(emp);
                testEntities.SaveChanges();
// once the save occurs, then the emp.Id will be populated after saveChanges() called
 sec.Id = emp.Id; // this line sets the sec.Id to the newly created ID when emp was added to DB.
                testEntities.AddToEMpSeconds(sec);
                testEntities.SaveChanges();
            }