public static void DeleteAllCopy(Book b)
{
try {
SqlConnection cn = new SqlConnection("Data Source=localhost;Initial Catalog=Library;Integrated Security=True");
SqlCommand cmd = new SqlCommand("Delete Copy where bookNumber = @bookNumber", cn);
cmd.Parameters.AddWithValue("@bookNumber", b.BookNumber);
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
} catch(Exception ex) {
MessageBox.Show(ex.Message);
}
}
public static bool Insert(Book b)
{
try {
SqlConnection cn = new SqlConnection("Data Source=localhost;Initial Catalog=Library;Integrated Security=True");
SqlCommand cmd = new SqlCommand("Insert into Book(bookNumber, title, authors, publisher) " +
"values(@bookNumber, @title, @authors, @publisher)", cn);
cmd.Parameters.AddWithValue("@bookNumber", b.BookNumber);
cmd.Parameters.AddWithValue("@title", b.Title);
cmd.Parameters.AddWithValue("@authors", b.Authors);
cmd.Parameters.AddWithValue("@publisher", b.Publisher);
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
return true;
} catch(Exception ex) {
MessageBox.Show(ex.Message);
return false;
}
}
public static bool Update(Book b)
{
return BookDA.Update(b);
}
public static bool Insert(Book b)
{
return BookDA.Insert(b);
}
public static bool Delete(Book b)
{
return BookDA.Delete(b);
}
private void btnAdd_Click_1(object sender, EventArgs e)
{
if (AddSave == 0)
{
btnAdd.Text = "Save";
SqlConnection cn=new SqlConnection("Data Source=localhost;Initial Catalog=Library;Integrated Security=True");
SqlDataAdapter da = new SqlDataAdapter("SELECT MAX(bookNumber) FROM Book", cn);
DataSet ds = new DataSet();
da.Fill(ds);
int Num = int.Parse(ds.Tables[0].Rows[0][0].ToString()) + 1;
txtBookNumber.Enabled = false;
txtBookNumber.Text = Num + "";
txtTitle.Enabled = true;
txtTitle.Text = "";
txtPublisher.Enabled = true;
txtPublisher.Text = "";
txtAuthors.Enabled = true;
txtAuthors.Text = "";
btnDelete.Enabled = false;
btnEdit.Enabled = false;
button7.Enabled = false;
AddSave = 1;//Save
}
else
{
int bookNum = int.Parse(txtBookNumber.Text);
string title = txtTitle.Text.Trim();
string author = txtAuthors.Text.Trim();
string publisher = txtPublisher.Text.Trim();
Book book = new Book(bookNum, title, author, publisher);
btnDelete.Enabled = true;
btnEdit.Enabled = true;
button7.Enabled = true;
AddSave = 0;//Add
btnAdd.Text = "Add";
try
{
BookBL.Insert(book);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
InitializeData();
txtBookNumber.Enabled = true;
}
}
private void btnEdit_Click(object sender, EventArgs e)
{
if (!isSelected())
{
MessageBox.Show("Please select a book to edit");
return;
}
if (EditSave == 0)
{
btnEdit.Text = "Save";
txtBookNumber.Enabled = false; ;
txtTitle.Enabled = true;
txtPublisher.Enabled = true;
txtAuthors.Enabled = true;
btnDelete.Enabled = false;
btnAdd.Enabled = false;
button7.Enabled = false;
EditSave = 1;//Save
}
else
{
int bookNum = int.Parse(txtBookNumber.Text);
string title = txtTitle.Text.Trim();
string author = txtAuthors.Text.Trim();
string publisher = txtPublisher.Text.Trim();
Book book = new Book(bookNum, title, author, publisher);
try
{
BookBL.Update(book);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
btnDelete.Enabled = true;
btnAdd.Enabled = true;
button7.Enabled = true;
EditSave = 0;//Edit
btnEdit.Text = "Edit";
InitializeData();
}
}
private void btnDelete_Click(object sender, EventArgs e)
{
if (!isSelected())
{
MessageBox.Show("Please select a book to delete");
return;
}
Book b = new Book();
b.BookNumber = int.Parse(Book_BookTable.SelectedRows[0].Cells["bookNumber"].Value.ToString());
DialogResult result = MessageBox.Show("Do you really want to delete this book", "Confirm", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
BookDA.DeleteAllCopy(b);
BookBL.Delete(b);
}
else { }
InitializeData();
}
