ExecuteReaderAsync

Overload List:

This method returns a Task-based asynchronous version of OracleCommand.ExecuteReader(), which fetches the result set as an OracleDataReader object.

ExecuteReaderAsync()

This method returns a Task-based asynchronous version of OracleCommand.ExecuteReader(), which fetches the result set as an OracleDataReader object.
ExecuteReaderAsync(CancellationToken cancellationToken)

This method returns a Task-based asynchronous version of OracleCommand.ExecuteReader(), which fetches the result set as an OracleDataReader object.
ExecuteReaderAsync(CommandBehavior behavior)

This method returns a Task-based asynchronous version of OracleCommand.ExecuteReader(), which fetches the result set as an OracleDataReader object.
ExecuteReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)

This method returns a Task-based asynchronous version of OracleCommand.ExecuteReader(), which fetches the result set as an OracleDataReader object.

Example (Using all overloads)

using Oracle.ManagedDataAccess.Client;
using System;
using System.Data; 
using System.Threading;

namespace AsyncApp
{
  class AsyncDemo
  {
    static async Task Main()
    {
      string connectionString = "User Id=HR; Password=<PASSWORD>; Data Source=oracle;";
      OracleConnection oc = new OracleConnection(connectionString);
      await oc.OpenAsync(CancellationToken.None);

      OracleCommand cmd = oc.CreateCommand();
      cmd.CommandText = "select * from demo_table";

      OracleDataReader reader;
        
      reader = await cmd.ExecuteReaderAsync();
      while (await reader.ReadAsync(CancellationToken.None))
      {
        Console.WriteLine(reader.GetValue(0));
      }

      reader = await cmd.ExecuteReaderAsync(CancellationToken.None);
      while (await reader.ReadAsync(CancellationToken.None))
      {
        Console.WriteLine(reader.GetValue(0));
      }

      reader = await cmd.ExecuteReaderAsync(CommandBehavior.Default);
      while (await reader.ReadAsync(CancellationToken.None))
      {
        Console.WriteLine(reader.GetValue(0));
      }

      reader = await cmd.ExecuteReaderAsync(CommandBehavior.Default, CancellationToken.None);
      while (await reader.ReadAsync(CancellationToken.None))
      {
        Console.WriteLine(reader.GetValue(0));
      }
    }
  }
}