public void InsertStudent(ModelMethodContext context)
{
var item = new ContosoUniversityModelBinding.Models.Student();
context.TryUpdateModel(item);
if (context.ModelState.IsValid)
{
db.Students.Add(item);
db.SaveChanges();
}
}
public void addStudentForm_InsertItem()
{
var item = new ContosoUniversityModelBinding.Models.Student();
TryUpdateModel(item);
if (ModelState.IsValid)
{
using (SchoolContext db = new SchoolContext())
{
db.Students.Add(item);
db.SaveChanges();
}
}
}
public void UpdateStudent(int studentID, ModelMethodContext context)
{
ContosoUniversityModelBinding.Models.Student item = null;
item = db.Students.Find(studentID);
if (item == null)
{
context.ModelState.AddModelError("", String.Format("Item with id {0} was not found", studentID));
return;
}
context.TryUpdateModel(item);
if (context.ModelState.IsValid)
{
db.SaveChanges();
}
}
public void DeleteStudent(int studentID, ModelMethodContext context)
{
var item = new ContosoUniversityModelBinding.Models.Student {
StudentID = studentID
};
db.Entry(item).State = EntityState.Deleted;
try
{
db.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
context.ModelState.AddModelError("",
String.Format("Item with id {0} no longer exists in the database.", studentID));
}
}
// The id parameter name should match the DataKeyNames value set on the control
public void studentsGrid_DeleteItem(int studentID)
{
using (SchoolContext db = new SchoolContext())
{
ContosoUniversityModelBinding.Models.Student item = new ContosoUniversityModelBinding.Models.Student()
{
StudentID = studentID
};
db.Entry(item).State = EntityState.Deleted;
try
{
db.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
ModelState.AddModelError("",
String.Format("Item with id {0} no longer exists in the database.", studentID));
}
}
}
// The id parameter name should match the DataKeyNames value set on the control
public void studentsGrid_UpdateItem(int studentID)
{
using (SchoolContext db = new SchoolContext())
{
ContosoUniversityModelBinding.Models.Student item = null;
item = db.Students.Find(studentID);
// Load the item here, e.g. item = MyDataLayer.Find(id);
if (item == null)
{
// The item wasn't found
ModelState.AddModelError("", String.Format("Item with id {0} was not found", studentID));
return;
}
TryUpdateModel(item);
if (ModelState.IsValid)
{
// Save changes here, e.g. MyDataLayer.SaveChanges();
db.SaveChanges();
}
}
}
