public void Delete(Modelo.Titles obj)
{
// Cria Conexão com banco de dados
SqlConnection conn = new SqlConnection(connectionString);
// Abre conexão com o banco de dados
conn.Open();
// Cria comando SQL
SqlCommand com = conn.CreateCommand();
// Define comando de exclusão
SqlCommand cmd = new SqlCommand("DELETE FROM Titles WHERE Title_ID = @title_id", conn);
SqlCommand cmdAT = new SqlCommand("DELETE FROM titleauthor WHERE Title_ID = @title_id", conn);
SqlCommand cmdSales = new SqlCommand("DELETE FROM sales WHERE Title_ID = @title_id", conn);
SqlCommand cmdRoy = new SqlCommand("DELETE FROM roysched WHERE Title_ID = @title_id", conn);
cmd.Parameters.AddWithValue("@title_id", obj.title_id);
cmdAT.Parameters.AddWithValue("@title_id", obj.title_id);
cmdSales.Parameters.AddWithValue("@title_id", obj.title_id);
cmdRoy.Parameters.AddWithValue("@title_id", obj.title_id);
// Executa Comando
cmdAT.ExecuteNonQuery();
cmdSales.ExecuteNonQuery();
cmdRoy.ExecuteNonQuery();
cmd.ExecuteNonQuery();
}
public List <Modelo.Titles> Select(string title_id)
{
// Variável para armazenar um livro
Modelo.Titles aTitle;
// Cria lista vazia
List <Modelo.Titles> aListTitles = new List <Modelo.Titles>();
// Cria conexão com banco de dados
SqlConnection conn = new SqlConnection(connectionString);
// Abre conexão com banco de dados
conn.Open();
// Cria comando SQL
SqlCommand cmd = conn.CreateCommand();
// Define SQL do comando
cmd.CommandText = "Select * from Titles Where title_id = @title_id";
cmd.Parameters.AddWithValue("@title_id", title_id);
// Executa comando, gerando objeto DbDataReader
SqlDataReader dr = cmd.ExecuteReader();
// Lê título do livro do resultado e apresenta no segundo rótulo
if (dr.HasRows)
{
while (dr.Read()) // Lê o próximo registro
// Cria objeto com dados lidos do banco de dados
{
aTitle = new Modelo.Titles(dr["title_id"].ToString(),
dr["title"].ToString(),
dr["pub_id"].ToString(),
dr["type"].ToString(),
conversorD(dr["price"].ToString()),
dr["notes"].ToString(),
conversorDT(dr["pubdate"].ToString()));
// Adiciona o livro à listra
aListTitles.Add(aTitle);
}
}
// Fecha DataReader
dr.Close();
// Fecha Conexão
conn.Close();
return(aListTitles);
}
public void Insert(Modelo.Titles obj)
{
// Cria Conexão com banco de dados
SqlConnection conn = new SqlConnection(connectionString);
// Abre conexão com o banco de dados
conn.Open();
// Cria comando SQL
SqlCommand com = conn.CreateCommand();
// Define comando de exclusão
SqlCommand cmd = new SqlCommand("INSERT INTO Titles(title_id, title, pub_id, type, price, notes, pubdate) VALUES(@title_id, @title, @pub_id, @type, @price, @notes, @pubdate)", conn);
cmd.Parameters.AddWithValue("@title_id", obj.title_id);
cmd.Parameters.AddWithValue("@title", obj.title);
cmd.Parameters.AddWithValue("@pub_id", obj.pub_id);
cmd.Parameters.AddWithValue("@type", obj.type);
cmd.Parameters.AddWithValue("@price", obj.price);
cmd.Parameters.AddWithValue("@notes", obj.notes);
cmd.Parameters.AddWithValue("@pubdate", obj.pubdate);
// Executa Comando
cmd.ExecuteNonQuery();
}
public void Update(Modelo.Titles obj)
{
// Cria Conexão com banco de dados
SqlConnection conn = new SqlConnection(connectionString);
// Abre conexão com o banco de dados
conn.Open();
// Cria comando SQL
SqlCommand com = conn.CreateCommand();
// Define comando de exclusão
SqlCommand cmd = new SqlCommand("UPDATE Titles SET title = @title, pub_id = @pub_id, type = @type, price = @price, pubdate = @pubdate WHERE Title_ID = @title_id", conn);
cmd.Parameters.AddWithValue("@title_id", obj.title_id);
cmd.Parameters.AddWithValue("@title", obj.title);
cmd.Parameters.AddWithValue("@pub_id", obj.pub_id);
cmd.Parameters.AddWithValue("@type", obj.type);
cmd.Parameters.AddWithValue("@price", obj.price);
cmd.Parameters.AddWithValue("@notes", obj.notes);
cmd.Parameters.AddWithValue("@pubdate", obj.pubdate);
// Executa Comando
cmd.ExecuteNonQuery();
}
