how to connect to oracle 10g using visual studio 2013 - oracle

Question

I am new to oracle database, so i wanted to know how i can connect to an oracle 10g database using visual studio 2013.
Well i went to the server explorer and add connection where i chose the data source as Oracle Database and the data provider as .NET Framework Data Provider for OLE DB.
After that on testing the connection i get the error message as-
ORA-06413: Connection not open.
I searched a lot but couldn't find a proper answer to this question..
Can somebody help me out please.
OK so this is what I have done till now-
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Hostel_Management_System
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btn_login_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection("Data Source=localhost;Initial Catalog=XE;Provider=SQLOLEDB;user-name=system;password=mypassword");
con.Open();
MessageBox.Show(con.State);
}
}
}
And I am getting a System.Data.OleDb.OleDbException in System.Data.dll.
Is this of any help??
[1]. http://i.stack.imgur.com/KUlZc.png

Answer 1

AFAIK the best way to create .net apps connected to Oracle is to use ODP.net and more specifically the managed driver which is available here.
The managed driver allows you to avoid installing an Oracle client on the machine your app runs on.
Sample code partially from the Oracle website:
using System;
using System.Data;
using Oracle.ManagedDataAccess.Client;
using System.Configuration;
class OracleConnectionSample
{
static void Main()
{
// Connect
const string connectionStringName = ...
string constr = ConfigurationManager.ConnectionStrings[connectionStringName].
ConnectionString;
using (var con = new OracleConnection(constr))
{
con.Open();
// Execute a SQL SELECT
using (OracleCommand cmd = con.CreateCommand())
{
cmd.CommandText = "select * from emp";
OracleDataReader reader = cmd.ExecuteReader();
// Print all employee numbers
while (reader.Read())
{
Console.WriteLine(reader.GetInt32(0));
}
}
}
}
}