public async Task <IActionResult> CreateNewCategory()
{
var categoryCreationVM = new CategoryCreationViewModel
{
ParentCategories = await _context.ResourceCategories.Where(c => c.Depth == 0).ToListAsync(),
};
return(View(categoryCreationVM));
}
public async Task <IActionResult> CreateNewCategory(
[Bind("ParentCategoryID", "IsNewParentCategory", "NewParentCategoryName", "NewSubcategoryName")]
CategoryCreationViewModel categoryCreationViewModel)
{
try
{
if (ModelState.IsValid)
{
int topLevelCategoryId = categoryCreationViewModel.ParentCategoryID;
if (categoryCreationViewModel.IsNewParentCategory)
{
//create a new top level category
if (string.IsNullOrEmpty(categoryCreationViewModel.NewParentCategoryName))
{
ModelState.AddModelError("", "New top-level category is unspecified");
}
var categoryEntry = _context.Add(new ResourceCategory()
{
CategoryName = categoryCreationViewModel.NewParentCategoryName,
Depth = 0,
});
await _context.SaveChangesAsync();
//overwrite this if new toplevel category to be created.
topLevelCategoryId = categoryEntry.Entity.ID;
}
_context.Add(new ResourceCategory()
{
Depth = 1,
ParentCategoryID = topLevelCategoryId,
CategoryName = categoryCreationViewModel.NewSubcategoryName
});
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
}
catch (DbUpdateException)
{
ModelState.AddModelError("", "Unable to save changes. " +
"Try again, and if the problem persists " +
"see your system administrator.");
}
return(View());
}
