public IQueryable<BookModel> booksGridView_GetData()
{
try
{
LibrarySystemEntities db = new LibrarySystemEntities();
var books = (from b in db.Books.ToList()
select new BookModel()
{
Id = b.id,
Title = b.title.Substring(0, Math.Min(b.title.Length, 20)) + "...",
Author = b.author,
Description = b.description,
Isbn = b.isbn,
WebSite = b.webSite,
Category = db.Categories.Find(b.categoryId).name
});
return books.AsQueryable<BookModel>();
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex.Message);
}
return null;
}
// The return type can be changed to IEnumerable, however to support
// paging and sorting, the following parameters must be added:
// int maximumRows
// int startRowIndex
// out int totalRowCount
// string sortByExpression
public IQueryable<Categories> catsGridView_GetData()
{
try
{
LibrarySystemEntities db = new LibrarySystemEntities();
return db.Categories.OrderBy(q => q.id);
}
catch (DbEntityValidationException ex)
{
// Retrieve the error messages as a list of strings.
var errorMessages = ex.EntityValidationErrors
.SelectMany(x => x.ValidationErrors)
.Select(x => x.ErrorMessage);
// Join the list to a single string.
var fullErrorMessage = string.Join("; ", errorMessages);
// Combine the original exception message with the new one.
var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);
// Throw a new DbEntityValidationException with the improved exception message.
ErrorSuccessNotifier.AddErrorMessage(exceptionMessage + " " + ex.EntityValidationErrors);
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex.Message);
}
return null;
}
protected void SaveBtn_Click(object sender, CommandEventArgs e)
{
try
{
var id = Convert.ToInt32(e.CommandArgument);
LibrarySystemEntities db = new LibrarySystemEntities();
var currCat = db.Categories.FirstOrDefault(c => c.id == id);
currCat.name = catName.Text;
db.SaveChanges();
Response.Redirect("~/Admin/EditCategories.aspx");
}
catch (DbEntityValidationException ex)
{
// Retrieve the error messages as a list of strings.
var errorMessages = ex.EntityValidationErrors
.SelectMany(x => x.ValidationErrors)
.Select(x => x.ErrorMessage);
// Join the list to a single string.
var fullErrorMessage = string.Join("; ", errorMessages);
// Combine the original exception message with the new one.
var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);
// Throw a new DbEntityValidationException with the improved exception message.
ErrorSuccessNotifier.AddErrorMessage(exceptionMessage + " " + ex.EntityValidationErrors);
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex.Message);
}
}
protected void Yes_Click(object sender, EventArgs e)
{
var context = new LibrarySystemEntities();
Button but = (Button)sender;
int id = int.Parse(but.CommandArgument);
var category = context.Categories.Find(id);
context.Categories.Remove(category);
try
{
context.SaveChanges();
this.EditCategoriesList.DataBind();
this.DeleteForm.Visible = false;
ErrorSuccessNotifier.AddSuccessMessage("Category Deleted");
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
ErrorSuccessNotifier.ShowAfterRedirect = true;
Response.Redirect("../EditCategories.aspx");
}
}
protected void EditBook_Command(object sender, CommandEventArgs e)
{
this.PanelCreateEdit.Visible = true;
this.LinkButtonEditSave.Visible = true;
this.LinkButtonCreateConfirm.Visible = false;
this.LinkButtonCreateNewBook.Visible = false;
this.LiteralBookToEditId.Text = e.CommandArgument.ToString();
var bookId = Convert.ToInt32(e.CommandArgument);
var context = new LibrarySystemEntities();
var book = context.Books.Include(b => b.Category).FirstOrDefault(b => b.BookId == bookId);
if (book == null)
{
ErrorSuccessNotifier.AddErrorMessage(
"An unexpected error occurred! The book you want to edit was not found...");
}
else
{
this.TextBoxCreateEditBookTitle.Text = book.Title;
this.TextBoxCreateEditBookAuthors.Text = book.Authors;
this.TextBoxCreateEditBookDescription.Text = book.Description;
this.TextBoxCreateEditBookIsbn.Text = book.ISBN;
this.TextBoxCreateEditBookWebSite.Text = book.WebSite;
this.DropDownListBookCategories.SelectedValue = book.Category.Name;
this.LinkButtonCreateConfirm.Visible = false;
}
}
protected void LinkButtonCreateConfirm_Click(object sender, EventArgs e)
{
var categoryName = this.TextBoxCreateCategoryName.Text.Trim();
if (categoryName.Length < 2)
{
ErrorSuccessNotifier.AddErrorMessage("Category name must consist of at least 2 symbols!");
return;
}
var context = new LibrarySystemEntities();
if (context.Categories.Any(c => c.Name == categoryName))
{
ErrorSuccessNotifier.AddErrorMessage("Category with this name already exists!");
return;
}
var newCategory = new Category();
newCategory.Name = categoryName;
context.Categories.Add(newCategory);
try
{
context.SaveChanges();
this.GridViewCategories.DataBind();
this.TextBoxCreateCategoryName.Text = string.Empty;
ErrorSuccessNotifier.AddSuccessMessage("Category successfully created!");
}
catch (Exception exc)
{
ErrorSuccessNotifier.AddErrorMessage(exc);
}
}
protected void CreateCategoryButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
string categoryName = this.CreateCategoryField.Text;
if (string.IsNullOrWhiteSpace(categoryName))
{
ErrorSuccessNotifier.AddErrorMessage("Category name cannot be empty");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
if (categoryName.Length < 3 || categoryName.Length > 100)
{
ErrorSuccessNotifier.AddErrorMessage("Category length should be between 3 and 100 symbols");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
Category newCategory = new Category();
newCategory.CategoryName = categoryName;
context.Categories.Add(newCategory);
context.SaveChanges();
ErrorSuccessNotifier.AddSuccessMessage("Category created!");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
protected void CreateBtn_Click(object sender, EventArgs e)
{
if (IsValid)
{
var context = new LibrarySystemEntities();
string title = this.CategoryTitleTb.Text;
Category category = new Category()
{
Name = title
};
try
{
context.Categories.Add(category);
context.SaveChanges();
this.CategoryTitleTb.Text = "";
this.InsertForm.Visible = false;
this.EditCategoriesList.DataBind();
ErrorSuccessNotifier.AddSuccessMessage("Category created");
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
ErrorSuccessNotifier.ShowAfterRedirect = true;
Response.Redirect("../EditCategories.aspx");
}
}
}
// The id parameter name should match the DataKeyNames value set on the control
public void GridViewBooks_UpdateItem(int id)
{
LibrarySystemEntities context = new LibrarySystemEntities();
var book = context.Books.Find(id);
InitializeEditPanel(id, context, book);
HideAllPanels();
this.PanelEditBook.Visible = true;
}
// The return type can be changed to IEnumerable, however to support
// paging and sorting, the following parameters must be added:
// int maximumRows
// int startRowIndex
// out int totalRowCount
// string sortByExpression
public IQueryable<Book> BooksListView_GetData()
{
var context = new LibrarySystemEntities();
var books = context.Books;
return books;
}
// The return type can be changed to IEnumerable, however to support
// paging and sorting, the following parameters must be added:
// int maximumRows
// int startRowIndex
// out int totalRowCount
// string sortByExpression
public IQueryable<Category> EditCategoriesList_GetData()
{
var context = new LibrarySystemEntities();
var categories = context.Categories;
return categories;
}
// The id parameter name should match the DataKeyNames value set on the control
public void GridViewBooks_DeleteItem(int id)
{
LibrarySystemEntities context = new LibrarySystemEntities();
var book = context.Books.Find(id);
HideAllPanels();
this.HiddenFieldDeleteBookId.Value = id.ToString();
this.TextBoxDeleteBookTitle.Text = book.Title;
this.PanelDeleteBook.Visible = true;
}
protected void LinkButtonCreateNewBook_Click(object sender, EventArgs e)
{
LibrarySystemEntities context = new LibrarySystemEntities();
ClearCreatePanelFields();
HideAllPanels();
this.DropDownListCreateBookCategory.DataSource = context.Categories.ToList();
this.DropDownListCreateBookCategory.DataBind();
this.PanelCreateBook.Visible = true;
}
// The id parameter name should match the DataKeyNames value set on the control
public void GridViewCategories_UpdateItem(int id)
{
LibrarySystemEntities context = new LibrarySystemEntities();
var cat = context.Categories.Find(id);
HideAllPanels();
this.LinkButtonCreateNewCategory.Visible = false;
this.HiddenFieldEditCategoryId.Value = id.ToString();
this.TextBoxEditCategoryName.Text = cat.Title;
this.PanelEditCategory.Visible = true;
}
protected void CreateNewBookBtn_Click(object sender, EventArgs e)
{
this.DeleteForm.Visible = false;
this.EditForm.Visible = false;
this.InsertForm.Visible = true;
var context = new LibrarySystemEntities();
var categories = context.Categories;
this.AllCategoriesList.DataSource = categories.ToList();
this.AllCategoriesList.DataBind();
}
protected void CreateBookButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
string title = this.TextBoxTitle.Text;
string author = this.TextBoxAuthor.Text;
string isbn = this.TextBoxISBN.Text;
string webSite = this.TextBoxWebSite.Text;
string description = this.TextBoxDescription.Text;
int categoryIndex = int.Parse(this.DropDownListCategory.SelectedValue);
if (string.IsNullOrWhiteSpace(title))
{
ErrorSuccessNotifier.AddErrorMessage("Title cannot be empty");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
if (string.IsNullOrWhiteSpace(author))
{
ErrorSuccessNotifier.AddErrorMessage("Author cannot be empty");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
if (title.Length < 3 || title.Length > 256)
{
ErrorSuccessNotifier.AddErrorMessage("Title's length should be between 3 and 256 symbols");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
if (author.Length < 3 || author.Length > 100)
{
ErrorSuccessNotifier.AddErrorMessage("Author's length should be between 3 and 100 symbols");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
var category = context.Categories.FirstOrDefault(c => c.Id == categoryIndex);
Book newBook = new Book();
newBook.Title = title;
newBook.Author = author;
newBook.ISBN = isbn;
newBook.WebSite = webSite;
newBook.Description = description;
newBook.Category = category;
category.Books.Add(newBook);
context.SaveChanges();
ErrorSuccessNotifier.AddSuccessMessage("Book created!");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
protected void ButtonDelete_Click(object sender, EventArgs e)
{
this.DeleteForm.Visible = true;
this.InsertForm.Visible = false;
this.EditForm.Visible = false;
Button but = (Button)sender;
int id = int.Parse(but.CommandArgument);
this.Yes.CommandArgument = id.ToString();
var context = new LibrarySystemEntities();
var book = context.Books.Find(id);
this.DeleteCategoryName.Text = book.Title;
}
protected void DeleteCategoryPanelButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
int categoryId = int.Parse(e.CommandArgument.ToString());
var category = context.Categories.FirstOrDefault(c => c.Id == categoryId);
if (category != null)
{
this.DeleteCategoryField.Text = category.CategoryName;
this.DeleteCategoryPanel.Visible = true;
this.EditCategoryPanel.Visible = false;
this.CreateCategoryPanel.Visible = false;
this.DeleteCategoryButton.CommandArgument = categoryId.ToString();
}
}
public IQueryable<BookViewModel> GridViewBooks_GetData()
{
var context = new LibrarySystemEntities();
var books = context.Books.Include(b => b.Category).OrderBy(b => b.BookId).Select(b =>
new BookViewModel()
{
BookId = b.BookId,
Title = b.Title,
Authors = b.Authors,
Description = b.Description,
ISBN = b.ISBN,
WebSite = b.WebSite,
Category = b.Category.Name
});
return books;
}
protected void DeleteCategoryButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
int categoryId = int.Parse(e.CommandArgument.ToString());
var category = context.Categories.FirstOrDefault(c => c.Id == categoryId);
var currentCategoryBooks = category.Books;
context.Books.RemoveRange(currentCategoryBooks);
context.Categories.Remove(category);
context.SaveChanges();
ErrorSuccessNotifier.AddSuccessMessage("Category deleted!");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
protected void LinkButtonDoDelete_Click(object sender, EventArgs e)
{
try
{
LibrarySystemEntities context = new LibrarySystemEntities();
var bookId = Convert.ToInt32(this.HiddenFieldDeleteBookId.Value);
var book = context.Books.Find(bookId);
context.Books.Remove(book);
context.SaveChanges();
HideAllPanels();
this.GridViewBooks.DataBind();
ErrorSuccessNotifier.AddSuccessMessage("Book deleted.");
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
}
}
protected void LinkButtonDoDelete_Click(object sender, EventArgs e)
{
try
{
LibrarySystemEntities context = new LibrarySystemEntities();
var catId = Convert.ToInt32(this.HiddenFieldDeleteCategoryId.Value);
var cat = context.Categories.Find(catId);
context.Books.RemoveRange(cat.Books); // Remove all books for this caregory
context.Categories.Remove(cat);
context.SaveChanges();
HideAllPanels();
this.GridViewCategories.DataBind();
ErrorSuccessNotifier.AddSuccessMessage("Category deleted.");
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
}
}
protected void DeleteCategory_Command(object sender, CommandEventArgs e)
{
this.PanelDelete.Visible = true;
this.LinkButtonCreateNewCategory.Visible = false;
this.LiteralCategoryToDeleteId.Text = e.CommandArgument.ToString();
var categoryId = Convert.ToInt32(e.CommandArgument);
var context = new LibrarySystemEntities();
var category = context.Categories.FirstOrDefault(c => c.CategoryId == categoryId);
if (category == null)
{
ErrorSuccessNotifier.AddErrorMessage(
"An unexpected error occurred! The category you want to delete was not found...");
}
else
{
this.TextBoxDeleteCategoryName.Text = category.Name;
}
}
protected void SaveBtn_Click(object sender, CommandEventArgs e)
{
try
{
var id = Convert.ToInt32(e.CommandArgument);
LibrarySystemEntities db = new LibrarySystemEntities();
var currBook = db.Books.FirstOrDefault(b => b.id == id);
currBook.title = bookTitle.Text;
currBook.author = bookAuthor.Text;
currBook.isbn = bookIsbn.Text;
currBook.webSite = bookWebSite.Text;
currBook.description = bookDescr.Text;
currBook.categoryId = db.Categories.First(b => b.name == bookCats.SelectedItem.Value).id;
db.SaveChanges();
Response.Redirect("~/Admin/EditBooks.aspx");
}
catch (DbEntityValidationException ex)
{
// Retrieve the error messages as a list of strings.
var errorMessages = ex.EntityValidationErrors
.SelectMany(x => x.ValidationErrors)
.Select(x => x.ErrorMessage);
// Join the list to a single string.
var fullErrorMessage = string.Join("; ", errorMessages);
// Combine the original exception message with the new one.
var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);
// Throw a new DbEntityValidationException with the improved exception message.
ErrorSuccessNotifier.AddErrorMessage(exceptionMessage + " " + ex.EntityValidationErrors);
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex.Message);
}
}
protected void ButtonEdit_Click(object sender, EventArgs e)
{
this.EditForm.Visible = true;
this.DeleteForm.Visible = false;
this.InsertForm.Visible = false;
Button but = (Button)sender;
int id = int.Parse(but.CommandArgument);
this.SaveEdit.CommandArgument = id.ToString();
var context = new LibrarySystemEntities();
var book = context.Books.Find(id);
var categories = context.Categories;
this.EditBookTitleTb.Text = book.Title;
this.EditBookAuthorTb.Text = book.Author;
this.EditBookIsbnTb.Text = book.ISBN;
this.EditWebSiteTb.Text = book.WebSite;
this.EditDescriptionTa.Value = book.Description;
this.EditAllCategories.DataSource = categories.ToList();
this.EditAllCategories.DataBind();
}
protected void DeleteBookButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
int bookId = int.Parse(e.CommandArgument.ToString());
var book = context.Books.FirstOrDefault(b => b.Id == bookId);
context.Books.Remove(book);
context.SaveChanges();
ErrorSuccessNotifier.AddSuccessMessage("Book deleted!");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
public IQueryable<Book> GridViewBooks_GetData()
{
var context = new LibrarySystemEntities();
return context.Books.Include("Category");
}
protected void ShowAddBookPanel_Click(object sender, EventArgs e)
{
this.CreateBookPanel.Visible = true;
this.EditBookPanel.Visible = false;
this.DeleteBookPanel.Visible = false;
var context = new LibrarySystemEntities();
this.DropDownListCategory.DataSource = context.Categories.ToList();
this.DropDownListCategory.DataBind();
}
protected void EditBooksPanelButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
this.DropDownListEditCategory.DataSource = context.Categories.ToList();
this.DropDownListEditCategory.DataBind();
int bookId = int.Parse(e.CommandArgument.ToString());
var book = context.Books.Include("Category").FirstOrDefault(c => c.Id == bookId);
if (book != null)
{
this.TextBoxEditTitle.Text = book.Title;
this.TextBoxEditAuthor.Text = book.Author;
this.TextBoxEditISBN.Text = book.ISBN;
this.TextBoxEditWebSite.Text = book.WebSite;
this.TextBoxEditDescription.Text = book.Description;
this.DropDownListEditCategory.SelectedValue = book.CategoryId.ToString();
this.EditBookPanel.Visible = true;
this.CreateBookPanel.Visible = false;
this.DeleteBookPanel.Visible = false;
this.EditBookButton.CommandArgument = bookId.ToString();
}
}
protected void EditBookButton_Command(object sender, CommandEventArgs e)
{
var context = new LibrarySystemEntities();
string title = this.TextBoxEditTitle.Text;
string author = this.TextBoxEditAuthor.Text;
string isbn = this.TextBoxEditISBN.Text;
string webSite = this.TextBoxEditWebSite.Text;
string description = this.TextBoxEditDescription.Text;
int categoryIndex = int.Parse(this.DropDownListEditCategory.SelectedValue);
if (string.IsNullOrWhiteSpace(title))
{
ErrorSuccessNotifier.AddErrorMessage("Title cannot be empty");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
if (string.IsNullOrWhiteSpace(author))
{
ErrorSuccessNotifier.AddErrorMessage("Author cannot be empty");
this.Response.Redirect("~/Admin/EditCategories.aspx");
}
if (title.Length < 3 || title.Length > 256)
{
ErrorSuccessNotifier.AddErrorMessage("Title's length should be between 3 and 256 symbols");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
if (author.Length < 3 || author.Length > 100)
{
ErrorSuccessNotifier.AddErrorMessage("Author's length should be between 3 and 100 symbols");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
int bookId = int.Parse(e.CommandArgument.ToString());
var book = context.Books.Include("Category").FirstOrDefault(b => b.Id == bookId);
var category = context.Categories.FirstOrDefault(c => c.Id == categoryIndex);
book.Title = title;
book.Author = author;
book.ISBN = isbn;
book.WebSite = webSite;
book.Description = description;
book.Category = category;
context.SaveChanges();
ErrorSuccessNotifier.AddSuccessMessage("Book modified!");
this.Response.Redirect("~/Admin/EditBooks.aspx");
}
