[Firebird-net-provider] DataReader.GetBytes Problem

[Bob L. <bo...@ta...>]

Carols:

I am trying to fill a stream from a blob field using a DataReader.  The =
code is from the .Net BLOB examples.  Below is the code I am using and =
the exception.  Could you look at this and help me figure out what I am =
doing wrong?

Thanks

Bob

Code:

private FileStream LoadFileStream ( FbDataReader aReader, out object[] =
aRecipeArray )
{
aRecipeArray =3D null;
BinaryWriter bw =3D null;    // Streams the BLOB to the FileStream =
object.
FileStream fs =3D null;
int bufferSize =3D 100;          // Size of the BLOB buffer.
byte[] outbyte =3D new byte[ bufferSize ];  // The BLOB byte[] buffer to =
be filled by GetBytes.
long retval;                            // The bytes returned from =
GetBytes.
long startIndex =3D 0;                    // The starting position in =
the BLOB output.
 try
 {
  while ( aReader.Read() )=20
  {
   aRecipeArray =3D new object[ RecipeColCount ];
   aReader.GetValues( aRecipeArray );
   fs =3D new FileStream( RecipeWorkStreamPath,  FileMode.OpenOrCreate, =
FileAccess.Write);
   bw =3D new BinaryWriter( fs );

   // Reset the starting byte for the new BLOB.
   startIndex =3D 0;

   // Read the bytes into outbyte[] and retain the number of bytes =
returned.
    // exception here

   retval =3D aReader.GetBytes( 1, startIndex, outbyte, 0, bufferSize);

Exception Code:

"System.InvalidCastException: Specified cast is not valid.\r\n  =20
at FirebirdSql.Data.Firebird.FbDataReader.GetBytes(Int32 i, Int64 =
dataIndex, Byte[] buffer, Int32 bufferIndex, Int32 length)\r\n   at =
DbUtility.DBUtilityForm.LoadFileStream(FbDataReader aReader, Object[]& =
aRecipeArray)
 in d:\\dbutility\\form1.cs:line 637"