private void btnView_Click(object sender, EventArgs e)
{
frmBookViewer frm = new frmBookViewer();
this.Hide();
frm.ListBooksOrFilter(false);
if (frm.ShowDialog(this) == DialogResult.OK)
{
this.Show();
}
}
public BookHandler(Books BookInfo, frmBookViewer.SaveOrUpdateDelete saveOrUpdateDelete, string old_ISBN, out bool success)
{
if (saveOrUpdateDelete == frmBookViewer.SaveOrUpdateDelete.Save)
{
qry = "INSERT INTO Books (Title,Author,ISBN,Year,Pages,Price,In_Stock,Hired_Out,pic)" +
"VALUES (@Title,@Author,@ISBN,@Year,@Pages,@Price,@In_Stock,@Hired_Out,@pic)";
}
else if (saveOrUpdateDelete == frmBookViewer.SaveOrUpdateDelete.Update)
{
qry = "UPDATE Books SET Title = @Title,Author = @Author,ISBN = @ISBN,Year = @Year," +
"Pages = @Pages,Price = @Price,In_Stock = @In_Stock,Hired_Out = @Hired_Out, pic = @pic WHERE ISBN = @OLD_ISBN";
}
else
{
qry = "DELETE FROM Books WHERE ISBN = @ISBN";
}
using (MySqlConnection Connection = new MySqlConnection(MyConString))
{
success = false;
try
{
MySqlCommand cmd = new MySqlCommand(qry, Connection);
cmd.Parameters.Add(new MySqlParameter("@Title", (object)BookInfo.Title));
cmd.Parameters.Add(new MySqlParameter("@Author", (object)BookInfo.Author));
cmd.Parameters.Add(new MySqlParameter("@ISBN", (object)BookInfo.ISBN));
cmd.Parameters.Add(new MySqlParameter("@Year", (object)BookInfo.Year));
cmd.Parameters.Add(new MySqlParameter("@Pages", (object)BookInfo.Pages));
cmd.Parameters.Add(new MySqlParameter("@Price", (object)BookInfo.Price));
cmd.Parameters.Add(new MySqlParameter("@In_Stock", (object)BookInfo.In_Stock));
cmd.Parameters.Add(new MySqlParameter("@Hired_Out", (object)BookInfo.Hired_Out));
cmd.Parameters.Add(new MySqlParameter("@pic", (object)BookInfo.pic));
cmd.Parameters.Add(new MySqlParameter("@OLD_ISBN", (object)old_ISBN));
Connection.Open();
cmd.ExecuteNonQuery();
success = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Database Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
Connection.Close();
}
}
}
