//Important OnPost"Delete"Async is the name of the handler. which is how asp-page-handler can access this
//this looks for the Customer object in the db with the id
//if found removes and saves the chanages then reloads the page
public async Task <IActionResult> OnPostDeleteAsync(int id)
{
var cx = await _db.Customers.FindAsync(id);
if (cx != null)
{
_db.Customers.Remove(cx);
await _db.SaveChangesAsync();
}
return(RedirectToPage());
}
//update the Customer object
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_db.Attach(Cx).State = EntityState.Modified;
try
{
await _db.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException e) {
throw new Exception($"Cx : {Cx.Id} not found", e);
}
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
//if the state of the model is in valid return this page?
return(Page());
}
// add the customer from the form (cx) into the list in the in memory db
_db.Customers.Add(Cx);
await _db.SaveChangesAsync();
//set the message string this can get caught by index
Message = $"Cx {Cx.Name} added!";
//sending the message to the logg
_log.LogCritical(Message.ToString());
//go to index when done
return(RedirectToPage("/Index"));
}