CSharpLibrary/stuff/Item/CadastroLivros.cs

using System;
using System.Windows.Forms;
using CSharpLibrary.stuff;
using CSharpLibrary.SqlTypes;
using System.Data.SqlClient;

namespace ProjetoLPVIII
{
    public partial class Cadastro_de_Livros : Form
    {
        public int? id1, id2, id3, id4;
        public string n1, n2, n3, n4;
        public int idI = -9999;
        public Cadastro_de_Livros()
        {
            InitializeComponent();
            Clean();
        }

        private void Clean()
        {
            txtAutor.Clear();
            txtEditora.Clear();
            txtGenero.Clear();
            txtISBN.Clear();
            txtNomeLivro.Clear();
            txtTipoMidia.Clear();
            statusLivro.Text = "";
        }

        private void btnSalvar_Click(object sender, EventArgs e)
        {
            SqlException sql = null;
            try { 
                Item i = new Item(null, txtNomeLivro.Text, (int)id1,(int)id2,(int)id3,(int)id4,txtISBN.Text.ToString(),statusLivro.SelectedItem.ToString());
                i.Add();
            }
            catch (SqlException g)
            {
                sql = g;
                MessageBox.Show("Falha no cadastro!");
            }
            if (sql == null)
            {
                MessageBox.Show("Item Cadastrado!");
                Clean();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Clean();
        }

        private void psqAutor_Click(object sender, EventArgs e)
        {
            search srch = new search(this, 1);
            srch.Show();
        }

        private void psqGenero_Click(object sender, EventArgs e)
        {
            search srch = new search(this, 2);
            srch.Show();
        }

        private void psqEditora_Click(object sender, EventArgs e)
        {
            search srch = new search(this, 3);
            srch.Show();
        }

        private void psqTipo_Click(object sender, EventArgs e)
        {
            search srch = new search(this, 4);
            srch.Show();
        }
        public void UpdateTxt()
        {
            if (n1 != null)
            {
                txtAutor.Text = n1;
            }
            if (n2 != null)
            {
                txtGenero.Text = n2;
            }
            if (n3 != null)
            {
                txtEditora.Text = n3;
            }
            if (n4 != null)
            {
                txtTipoMidia.Text = n4;
            }
        }
    }
}