![// Create and execute the DataReader, writing the result
// set to the console window.
try
{
connection.Open();
OleDbDataReader reader = command.ExecuteReader();
while (reader.Read())
{
Console.WriteLine("t{0}t{1}t{2}",
reader[0], reader[1], reader[2]);
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}
}](https://image.slidesharecdn.com/proveedormanuel-130613131241-phpapp01/85/Proveedor-manuel-5-320.jpg)
![command.Parameters.AddWithValue("@pricePoint", paramValue);
try
{ connection.Open();
OdbcDataReader reader = command.ExecuteReader();
while (reader.Read())
{ Console.WriteLine("t{0}t{1}t{2}",
reader[0], reader[1], reader[2]);
}
reader.Close();
}
catch (Exception ex) { Console.WriteLine(ex.Message);
}
Console.ReadLine(); }
}](https://image.slidesharecdn.com/proveedormanuel-130613131241-phpapp01/85/Proveedor-manuel-7-320.jpg)
Proveedor manuel
- 1. Instituto Tecnológico Superior de Coatzacoalcos Ingeniería en Informática Modalidad Abierto ALUMNO: Manuel Santiago José Augusto Semestre: 6° Grupo: A Nombre del Docente: ISC Rosario de Alba Domínguez Rodríguez Fecha de entrega: 3 de junio de 2013 DESARROLLO DE APLICACIONES WEB. Unidad 2: Entorno de programación Actividad 1: Componentes de un proveedor de datos .NET
- 2. System.Data.OracleClient • OracleCommand • OracleConnection • OracleDataReader • OracleDatSet Objetos principales Proveedor SQL Objetos principales ADO.NET Proveedor OLEDB Proveedor ODBC Espacio de nombres Proveedor Oracle Espacio de nombres System.Data.OleDb System.Data.SqlClient • SqlConnection • SqlCommand • SqlDataAdapter • DataSet • DataTables • OleDbCommand • OleDbConnection • OleDbDatadapter • OleDbDataReaderObjetos principales Espacio de nombres System.Data.Odbc Objetos principales • OdbcCommand • OdbcConnection • OdbcDataAdapter • OdbcDataReader Espacio de nombres DataSet Mapa conceptual. Componentes de un proveedor de datos .NET Proveedores Componentes
- 3. Código ejemplo en C# Conectando con una BD Oracle utilizando Odbc usingMicrosoft.Data.Odbc; OdbcConnection myConn = new OdbcConnection("DSN=MYDNS;UID=MYUID;PWD=mypass;"); myConn.Open(); String mySql = "select 1 from dual"; OdbcCommand myCmd = new OdbcCommand(mySql, myCon); OdbcDataReader myReader = myCmd.ExecuteReader(); while (myReader.Read()) { Console.WriteLine(myReader.GetString(0)); } Conectando con una BD en SQL Server usingSystem.Data.OleDb; usingSystem.Data.Sql; usingSystem.Data.SqlClient; System.Data.SqlClient.SqlConnection con; con = new System.Data.SqlClient.SqlConnection(); con.ConnectionString = “ con.ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=H:NEGOCIO.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"; try { con.Open(); MessageBox.Show("La conexión a la base de datos se estableció exitosamente"); } catch (Exception) { MessageBox.Show("No se pudo establecer la conexión a la base de datos. El sistema se cerrará"); this.Close(); }
- 4. Conectando con una BD utilizando Oledb using System; usingSystem.Data; usingSystem.Data.OleDb; class Program { static void Main() { stringconnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + "c:DataNorthwind.mdb;User Id=admin;Password=;"; // Provide the query string with a parameter placeholder. stringqueryString = "SELECT ProductID, UnitPrice, ProductName from products " + "WHERE UnitPrice> ? " + "ORDER BY UnitPrice DESC;"; intparamValue = 5; using (OleDbConnection connection = newOleDbConnection(connectionString)) { // Create the Command and Parameter objects. OleDbCommand command = new OleDbCommand(queryString, connection); command.Parameters.AddWithValue("@pricePoint", paramValue); // Open the connection in a try/catch block.
- 5. // Create and execute the DataReader, writing the result // set to the console window. try { connection.Open(); OleDbDataReader reader = command.ExecuteReader(); while (reader.Read()) { Console.WriteLine("t{0}t{1}t{2}", reader[0], reader[1], reader[2]); } reader.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); } Console.ReadLine(); } }
- 6. Conectando con una bd utilizando Odbc using System; usingSystem.Data; usingSystem.Data.Odbc; class Program { static void Main() { stringconnectionString = "Driver={Microsoft Access Driver (*.mdb)};" + "Dbq=c:DataNorthwind.mdb;Uid=Admin;Pwd=;"; stringqueryString = "SELECT ProductID, UnitPrice, ProductName from products " + "WHERE UnitPrice> ? " + "ORDER BY UnitPrice DESC;"; intparamValue = 5; using (OdbcConnection connection = newOdbcConnection(connectionString)) {OdbcCommand command = new OdbcCommand(queryString, connection); command.Parameters.AddWithValue("@pricePoint", paramValue); intparamValue = 5; using (OdbcConnection connection = newOdbcConnection(connectionString)) { // Create the Command and Parameter objects. OdbcCommand command = new OdbcCommand(queryString, connection);
- 7. command.Parameters.AddWithValue("@pricePoint", paramValue); try { connection.Open(); OdbcDataReader reader = command.ExecuteReader(); while (reader.Read()) { Console.WriteLine("t{0}t{1}t{2}", reader[0], reader[1], reader[2]); } reader.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); } Console.ReadLine(); } }
- 8. Referencias electrónicas http://msdn.microsoft.com/es-es/library/ms228366(v=vs.80).aspx http://msdn.microsoft.com/es-es/library/ms254507.aspx?cs-save-lang=1&cs- lang=csharp#code-snippet-1 http://msdn.microsoft.com/es-es/library/aa719763(v=vs.71).aspx http://www.slideshare.net/jman861/savedfiles?s_title=conexin-c-sql- server&user_login=LUZARIZPE http://www.slideshare.net/mdurantorres/conexin-a-sql-server-con-c http://wiki.elhacker.net/programacion/dotnet/generalidades/bibliotecas- principales