private void btn_delete_category_Click(object sender, EventArgs e)
        {
            string dpPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "books.sqlite");
            var    db     = new SQLiteConnection(dpPath);


            var subitem = new Tbl_Books();

            subitem.Cid = Convert.ToInt32(txtviewid.Text);

            var data_s = db.Query <Tbl_Books>("select *  from Tbl_Books where Cid=" + Convert.ToInt32(txtviewid.Text));

            if (data_s.Count > 0)
            {
                Toast.MakeText(this, "Record Will not deleted as Book Exists...,", ToastLength.Short).Show();
            }
            else
            {
                var item = new Tbl_Books_Category();
                item.Id = Convert.ToInt32(txtviewid.Text);
                var data = db.Delete(item);
                Toast.MakeText(this, "Record Deleted Successfully...,", ToastLength.Short).Show();
                txt_category.Text = "";
                load_spiner_category();
            }
        }
        private void Btndeletebook_Click(object sender, EventArgs e)
        {
            var item = new Tbl_Books();

            item.Id = Convert.ToInt32(txtbookid.Text);

            string dpPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "books.sqlite");
            var    db     = new SQLiteConnection(dpPath);
            var    data   = db.Delete(item);

            Toast.MakeText(this, "Record Deleted Successfully...,", ToastLength.Short).Show();
            txtbookname.Text = "";
            load_spiner_category();
            load_spiner_books();
        }
        private void Btnsavebook_Click(object sender, EventArgs e)
        {
            string dpPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "books.sqlite");
            var    db     = new SQLiteConnection(dpPath);

            db.CreateTable <Tbl_Books>();
            Tbl_Books tbl = new Tbl_Books();

            tbl.Books_Title = Convert.ToString(txtbookname.Text);
            tbl.Cid         = Convert.ToInt32(txtcategoryid.Text);
            tbl.Price       = Convert.ToInt32(txt_price.Text);
            db.Insert(tbl);
            Toast.MakeText(this, "Record Added Successfully...,", ToastLength.Short).Show();
            txtbookname.Text = "";
            load_spiner_category();
            load_spiner_books();
        }