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POentity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding related objects to entity in Entity Framework 4.1
 

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    <p>I am trying to save Employee details, which has references with City. But everytime I try to save my contact, which is validated I get the exception <strong>"ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker"</strong></p> <p>I had read so many post but still not getting the exact idea of what to do... my Save button click code is given below</p> <pre><code>protected void Button1_Click(object sender, EventArgs e) { EmployeeService es = new EmployeeService(); CityService cs = new CityService(); DateTime dt = new DateTime(2008, 12, 12); Payroll.Entities.Employee e1 = new Payroll.Entities.Employee(); Payroll.Entities.City city1 = cs.SelectCity(Convert.ToInt64(cmbCity.SelectedItem.Value)); e1.Name = "Archana"; e1.Title = "aaaa"; e1.BirthDate = dt; e1.Gender = "F"; e1.HireDate = dt; e1.MaritalStatus = "M"; e1.City = city1; es.AddEmpoyee(e1,city1); } </code></pre> <p>and <strong>Employeeservice Code</strong></p> <pre><code>public string AddEmpoyee(Payroll.Entities.Employee e1, Payroll.Entities.City c1) { Payroll_DAO1 payrollDAO = new Payroll_DAO1(); payrollDAO.AddToEmployee(e1); //Here I am getting Error.. payrollDAO.SaveChanges(); return "SUCCESS"; } </code></pre>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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