protected void DeleteEvent(object sender, EventArgs e)
        {
            UserScreen obj = new UserScreen();

            try
            {
                obj.delete(string.Format("Delete From dbo.BookTable Where Name='{0}'", GridView1.SelectedRow.Cells[2].Text));
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            bind();
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            var connection = "Data Source=AURBLRLT-439;Initial Catalog=library;Integrated Security=True";
            var cnt        = Count();

            if (check() == 0)
            {
                try
                {
                    string        cmd     = "Insert Into dbo.BookTable values(@Id,@Name,@Author,@Checked,@BookCount)";
                    SqlConnection conn    = new SqlConnection(connection);
                    SqlCommand    command = new SqlCommand(cmd, conn);
                    command.Parameters.AddWithValue("@Name", TextBox3.Text);
                    command.Parameters.AddWithValue("@Author", TextBox1.Text);
                    command.Parameters.AddWithValue("@Id", cnt + 1);
                    command.Parameters.AddWithValue("@Checked", 0);
                    command.Parameters.AddWithValue("@BookCount", Convert.ToInt32(TextBox4.Text));
                    conn.Open();
                    command.ExecuteNonQuery();
                    conn.Close();
                }
                catch (Exception ex)
                {
                    Response.Write(ex.Message);
                }
                bind();
                TextBox1.Text = "";
                TextBox3.Text = "";
                TextBox4.Text = "";
            }
            else
            {
                var        count = check();
                UserScreen obj   = new UserScreen();
                var        c     = Convert.ToInt32(TextBox4.Text) + count;
                obj.Increment(string.Format("Update dbo.BookTable Set BookCount={0} Where Name='{1}'", c, TextBox3.Text));
                bind();
            }
        }