Database connectivity [closed]

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How can I establish the database connection with the back end of oracle10g express edition with the front end of asp.net?. Please send the source code.

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Once you've downloaded the appropriate driver you reference the assembly in your project you could perform SQL queries against the database:

using (var conn = new OracleConnection(ConnectionString))
using (var command = conn.CreateCommand())
{
    conn.Open();
    command.CommandText = "SELECT id FROM foo;";
    using (var reader = command.ExecuteReader())
    {
        while (reader.Read())
        {
            // TODO: exploit the results
        }
    }
}

Reading the technical articles accompanying the driver might also be useful.