Error while Opening the connnetion in Ado.net

See more:

C#

C#4.0

Hai,
i need to retrive the Data from sqlserver using the Oledb Connection...because using this we can get data from any source..
But my code showing error.. i don't know why..

using System.Data;
using System.Data.OleDb;

public partial class Window1 : Window
   {
       public Window1()
       {
           InitializeComponent();
   
        }

private void button1_Click(object sender, RoutedEventArgs e)
       {
try{
             OleDbConnection oConn = new OleDbConnection(@"Provider=SQLOLEDB;Data Source=ETG75\SQLEXPRESS;Initial Catalog=SampleDb;Integrated Security=True");
        if (oConn.State != ConnectionState.Open)
               {
               oConn.Open();
               }
}
catch(Exception ex)
{

}
       }

}


This Code giving the Following error...

"No error message available, result code: DB_E_ERRORSOCCURRED(0x80040E21)."


When replace the "Integrated Security=True " with "Trusted_connection=true "
it giving error like " Login failed for the user venkat"
But i can connect with sqlconnection...


Please provide the Solution for the How to Connect and Open through Oledb provider......