CopyToAsync returns a Task-based asynchronous version of OracleBlob.CopyTo().

Overload List:

• CopyToAsync(Int64, OracleBlob, Int64, Int64)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

• CopyToAsync(Int64, OracleBlob, Int64, Int64, CancellationToken)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

• CopyToAsync(OracleBlob, Int64)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

• CopyToAsync(OracleBlob, Int64, CancellationToken)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

• CopyToAsync(OracleBlob)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

• CopyToAsync(OracleBlob, CancellationToken)

  This instance method returns a Task-based asynchronous version of OracleBlob.CopyTo().

Example (includes all Overloads)

using Oracle.ManagedDataAccess.Client;
using Oracle.ManagedDataAccess.Types;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace AsyncApp
{
  class AsyncDemo
  {
    static async Task Main(string[] args)
    {
      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 blob_column from tab1";

      OracleBlob blob1 = new OracleBlob(oc);
      OracleBlob blob2 = new OracleBlob(oc);
      OracleBlob blob3 = new OracleBlob(oc);
      OracleBlob blob4 = new OracleBlob(oc);
      OracleBlob blob5 = new OracleBlob(oc);
      OracleBlob blob6 = new OracleBlob(oc);

      OracleDataReader reader = await cmd.ExecuteReaderAsync();

      await reader.ReadAsync(CancellationToken.None) ;
        using (OracleBlob blob = reader.GetOracleBlob(0))
        {
          //asynchronously copy blob data
          Int64 bytesCopied1 = await blob.CopyToAsync(0, blob1, 0, blob.Length);
          Console.WriteLine("bytes copied to blob1 = " + bytesCopied1);

          //asynchronously copy blob data
          Int64 bytesCopied2 = await blob.CopyToAsync(0, blob2, 0, blob.Length, CancellationToken.None);
          Console.WriteLine("bytes copied to blob2 = " + bytesCopied2);

          //asynchronously copy blob data
          Int64 bytesCopied3 = await blob.CopyToAsync(blob3, 0);
          Console.WriteLine("bytes copied to blob3 = " + bytesCopied3);

          //asynchronously copy blob data
          Int64 bytesCopied4 = await blob.CopyToAsync(blob4, 0, CancellationToken.None);
          Console.WriteLine("bytes copied to blob4 = " + bytesCopied4);

          //asynchronously copy blob data
          Int64 bytesCopied5 = await blob.CopyToAsync(blob5);
          Console.WriteLine("bytes copied to blob5 = " + bytesCopied5);

          //asynchronously copy blob data
          Int64 bytesCopied6 = await blob.CopyToAsync(blob6, CancellationToken.None);
          Console.WriteLine("bytes copied to blob6 = " + bytesCopied6);
        } 
    }
  }
}