Occurs when I try to set the identity_insert to ON in the SQL DATAMANAGEMENT STUDIO.
The worst is I do not know why should I deal with this value, and I am not even sure that the following code hits more than the copy of the database in the local memory.
I have got this message previously, when the debug hits the SaveChanges line : "Cannot insert explicit value for identity column in table 'tblCustomer' when IDENTITY_INSERT is set to OFF"
` public ActionResult Submit(
Customer obj) //validation runs
{
if (ModelState.IsValid)
{
CustomerDal Dal = new CustomerDal();
Dal.Customer.Add(obj); //in memory
Dal.SaveChanges(); //physical commit
return View("Customer", obj);
}
else
{
return View("EnterCustomer", obj);
}
}`
public class Customer
{
[Key]
[Required]
[DatabaseGenerated(DatabaseGeneratedOption.none)]
public string CustomerCode { get; set; }
[Required]
[StringLength(10)]
[RegularExpression("^[A-Z]{7,7}$")]
public string CustomerName { get; set; }
}
public class CustomerDal : DbContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<Customer>().ToTable("tblCustomer");
}
public DbSet<Customer> Customer { get; set; }
}
CREATE TABLE [dbo].[tblCustomer](
[CustomerCode] [varchar](50) NOT NULL,
[CustomerName] [varchar](50) NULL,
CONSTRAINT [PK_tblCustomer] PRIMARY KEY CLUSTERED
(
[CustomerCode] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,
IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON [PRIMARY]
) ON [PRIMARY]
@using (Html.BeginForm("Submit", "Customer", FormMethod.Post))
{
<i>Customer Name : </i> @Html.TextBoxFor(m => m.CustomerName)
<br>
@Html.ValidationMessageFor(x => x.CustomerName)
<br>
<i>Customer Code : </i> @Html.TextBoxFor(m => m.CustomerCode)
<br>
@Html.ValidationMessageFor(x => x.CustomerCode)
<br>
<input id = "Submit1" type = "submit" value = "submit"/>
}
