Question

I get this exception thrown whenever I try and submit data through a form to this database :-

• Exception

  Cannot insert explicit value for identity column in table ‘ClientDetails’ when IDENTITY_INSERT is set to OFF.

However, the form doesn’t have a field so data can enter the identity column (PK) so I’m at a loss as to why this is occuring.

At the moment I’m using the standard asp.net mvc submit button but I will link it eventually to a jquery dialog button

The ClientNo Column which is the said column the exception is referring to has the following attributes

• Name – ClientNo
• type – int
• NULLS – NO
• Identity Spec – Yes
• Is Identity – Yes
• Increment – 1
• Seed – 1

The ClientNo has data 900 onwards etc

This exception is also thrown when the client form has no data entered in form

Its thrown on a DataCOntext.SubmitChanges() method

[AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create1(ClientDetail client)
        {
            if(ModelState.IsValid)
            { 
            client = new ClientDetail();



                UpdateModel(client);
                //Debug Code
                System.Diagnostics.Debug.WriteLine("AddNewClient Create1");
                repo.AddNewClient(client);
                //Debug Code
                System.Diagnostics.Debug.WriteLine("Save Create1");


                // System.Data.SqlClient.SqlException thrown at this line  
                repo.Save();

                //Debug Code - never reached
                System.Diagnostics.Debug.WriteLine("Saved Changes");


              //  return RedirectToAction("Details", new { id = client.ClientNo });




            }
            return View(client);
        }

public void AddNewClient(ClientDetail client)
       {    
            System.Diagnostics.Debug.WriteLine("Start Insert On Submit");

            db.ClientDetails.InsertOnSubmit(client);
            System.Diagnostics.Debug.WriteLine("Finish Insert On Submit");
       }

public void Save()
        {
            System.Diagnostics.Debug.WriteLine("In Save Method");
            db.GetChangeSet();
            System.Diagnostics.Debug.WriteLine("Got ChangeSet"); 
            db.SubmitChanges();
            System.Diagnostics.Debug.WriteLine("Exit Save Method");
        }
Is this the query everyone is talking about

[Column(Storage="_ClientNo", DbType="Int NOT NULL", IsPrimaryKey=true, UpdateCheck=UpdateCheck.Never)]
        public int ClientNo
        {
            get
            {
                return this._ClientNo;
            }
            set
            {
                if ((this._ClientNo != value))
                {
                    this.OnClientNoChanging(value);
                    this.SendPropertyChanging();
                    this._ClientNo = value;
                    this.SendPropertyChanged("ClientNo");
                    this.OnClientNoChanged();
                }
            }
        }

Does anyone know a solution or reason as to why this is occuring?

Thank you

Answer 1

Add IsDbGenerated=true To ClientNo Property

[Column(Storage="_ClientNo", DbType="Int NOT NULL", **IsDbGenerated=true,** IsPrimaryKey=true, UpdateCheck=UpdateCheck.Never)] 
public int ClientNo