private void button7_Click(object sender, EventArgs e)
{
MainCat mc = new MainCat("tom");
Mouse mu1 = new Mouse("Jerry");
Mouse mu2 = new Mouse("Jeck");
mc.CatShout += new MainCat.CateShoutEventHandler(mu1.Run);
mc.CatShout += new MainCat.CateShoutEventHandler(mu2.Run);
mc.Shout();
}
public bool AddMainCat(MainCat mainCat)
{
try
{
_context.Add(mainCat);
_context.SaveChanges();
}
catch (DbUpdateException)
{
return(false);
}
return(true);
}
public IActionResult Create([Bind("Id,Name")] MainCat mainCat)
{
if (ModelState.IsValid)
{
var result = _service.CreateMainCat(mainCat);
if (result != null)
{
return(NotFound());
}
return(RedirectToAction(nameof(Index)));
}
return(View(mainCat));
}
public bool RemoveMainCat(MainCat mainCat)
{
try
{
_context.MainCats.Remove(mainCat);
_context.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
return(false);
}
catch (DbUpdateException)
{
return(false);
}
return(true);
}
public MainCat CreateMainCat(MainCat mainCat)
{
try
{
_context.Add(mainCat);
_context.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
return(null);
}
catch (DbUpdateException)
{
return(null);
}
return(mainCat);
}
public IActionResult Edit(int id, [Bind("Id,Name")] MainCat mainCat)
{
if (id != mainCat.Id)
{
return(NotFound());
}
if (ModelState.IsValid)
{
try
{
//_context.Update(mainCat);
//_context.SaveChanges();
bool result = _service.UpdateMainCat(mainCat);
if (result)
{
return(RedirectToAction(nameof(Index)));
}
else
{
ModelState.AddModelError("", "Error saving");
}
}
catch (DbUpdateConcurrencyException)
{
if (!MainCatExists(mainCat.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToAction(nameof(Index)));
}
return(View(mainCat));
}
public bool UpdateMainCat(MainCat mainCat)
{
_context.Update(mainCat);
_context.SaveChanges();
return(true);
}
