画像ファイルをBLOB型で保存（oracle8.1.7）

OleDbConnection DBConn = new OleDbConnection("Provider=MSDAORA.1;User ID=aaa;Data Source=TEST;Password=aaa;");

OleDbTransaction trnFs01; 
OleDbCommand cmdFs01; 

byte [] bytBLOB_DATA;
cmdFs01 = new OleDbCommand(); 

DBConn.Open(); 

trnFs01 = DBConn.BeginTransaction(); 
cmdFs01.Transaction = trnFs01; 
cmdFs01.Connection = DBConn; 

cmdFs01.CommandText = "INSERT INTO TBL_BLOB_TEST(BLOBID, BLOB_DATA) values(?,?)"; 

String strBLOBFilePath = @"D:\test.jpg";
FileStream fsBLOBFile =  new FileStream(strBLOBFilePath,FileMode.Open, FileAccess.Read);
bytBLOB_DATA = new Byte[fsBLOBFile.Length]; 
fsBLOBFile.Read(bytBLOB_DATA, 0, bytBLOB_DATA.Length);

cmdFs01.Parameters.Add("BLOBID", OleDbType.Char, 10, "BLOBID").Value = TextBox1.Text;
cmdFs01.Parameters.Add("BLOB_DATA", OleDbType.LongVarBinary).Value = bytBLOB_DATA; 

fsBLOBFile.Close();

cmdFs01.ExecuteNonQuery(); 
trnFs01.Commit(); 

DBConn.Close();