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// testblob.cs - tests loading a binary file into an oracle blob and vice-versa
using System;
using System.Data;
using System.Data.OracleClient;
using System.Text;
using System.IO;
class TestBlob
{
static string infilename = @"../../../tools/mono-win32-setup-dark.bmp";
static string outfilename = @"mono-win32-setup-dark2.bmp";
static string connectionString = "Data Source=testdb;User ID=scott;Password=PLACEHOLDER";
static byte[] bytes1 = null;
public static void Main (string[] args)
{
OracleConnection con = new OracleConnection();
con.ConnectionString = connectionString;
con.Open();
BLOBTest (con);
ReadBlob (con);
con.Close();
con = null;
}
// read the BLOB into file "cs-parser2.cs"
public static void ReadBlob (OracleConnection connection)
{
if (File.Exists(outfilename) == true) {
Console.WriteLine("Filename already exists: " + outfilename);
return;
}
OracleCommand rcmd = connection.CreateCommand ();
rcmd.CommandText = "SELECT BLOB_COLUMN FROM BLOBTEST";
OracleDataReader reader2 = rcmd.ExecuteReader ();
if (!reader2.Read ())
Console.WriteLine ("ERROR: RECORD NOT FOUND");
Console.WriteLine (" TESTING OracleLob OBJECT 2...");
OracleLob lob2 = reader2.GetOracleLob (0);
Console.WriteLine (" LENGTH: {0}", lob2.Length);
Console.WriteLine (" CHUNK SIZE: {0}", lob2.ChunkSize);
byte[] lobvalue = (byte[]) lob2.Value;
if (ByteArrayCompare(bytes1, lobvalue) == true)
Console.WriteLine("bytes1 and bytes2 are equal: good");
else
Console.WriteLine("bytes1 and bytes2 are not equal: bad");
FileStream fs = new FileStream(outfilename, FileMode.CreateNew);
BinaryWriter w = new BinaryWriter(fs);
w.Write(lobvalue);
w.Close();
fs.Close();
lob2.Close ();
reader2.Close ();
}
public static void BLOBTest (OracleConnection connection)
{
Console.WriteLine (" BEGIN TRANSACTION ...");
OracleTransaction transaction = connection.BeginTransaction ();
Console.WriteLine (" Drop table BLOBTEST ...");
try {
OracleCommand cmd2 = connection.CreateCommand ();
cmd2.Transaction = transaction;
cmd2.CommandText = "DROP TABLE BLOBTEST";
cmd2.ExecuteNonQuery ();
}
catch (OracleException) {
// ignore if table already exists
}
Console.WriteLine (" CREATE TABLE ...");
OracleCommand create = connection.CreateCommand ();
create.Transaction = transaction;
create.CommandText = "CREATE TABLE BLOBTEST (BLOB_COLUMN BLOB)";
create.ExecuteNonQuery ();
Console.WriteLine (" INSERT RECORD ...");
OracleCommand insert = connection.CreateCommand ();
insert.Transaction = transaction;
insert.CommandText = "INSERT INTO BLOBTEST VALUES (EMPTY_BLOB())";
insert.ExecuteNonQuery ();
OracleCommand select = connection.CreateCommand ();
select.Transaction = transaction;
select.CommandText = "SELECT BLOB_COLUMN FROM BLOBTEST FOR UPDATE";
Console.WriteLine (" SELECTING A BLOB (Binary Large Object) VALUE FROM BLOBTEST");
OracleDataReader reader = select.ExecuteReader ();
if (!reader.Read ())
Console.WriteLine ("ERROR: RECORD NOT FOUND");
Console.WriteLine (" TESTING OracleLob OBJECT ...");
OracleLob lob = reader.GetOracleLob (0);
Console.WriteLine (" LENGTH: {0}", lob.Length);
Console.WriteLine (" CHUNK SIZE: {0}", lob.ChunkSize);
//try {
if (File.Exists(infilename) == false) {
Console.WriteLine("Filename does not exist: " + infilename);
return;
}
FileStream fs = new FileStream(infilename, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs);
byte[] bytes = null;
int bufferLen = 8192;
bytes = r.ReadBytes (bufferLen);
while(bytes.Length > 0) {
Console.WriteLine("byte count: " + bytes.Length.ToString());
lob.Write (bytes, 0, bytes.Length);
bytes1 = ByteArrayCombine (bytes1, bytes);
if (bytes.Length < bufferLen)
break;
bytes = r.ReadBytes (bufferLen);
}
r.Close();
fs.Close ();
//}
//catch (Exception e) {
// Console.WriteLine("The file could not be read:");
// Console.WriteLine(e.Message);
//}
lob.Close ();
Console.WriteLine (" CLOSING READER...");
reader.Close ();
transaction.Commit ();
transaction = null;
lob = null;
reader.Dispose();
reader = null;
create = null;
insert = null;
select = null;
}
static byte[] ByteArrayCombine (byte[] b1, byte[] b2)
{
if (b1 == null)
b1 = new byte[0];
if (b2 == null)
b2 = new byte[0];
byte[] bytes = new byte[b1.Length + b2.Length];
int i = 0;
for (int j = 0; j < b1.Length; j++) {
bytes[i] = b1[j];
i++;
}
for (int k = 0; k < b2.Length; k++) {
bytes[i] = b2[k];
i++;
}
return bytes;
}
static bool ByteArrayCompare(byte[] ba1, byte[] ba2)
{
if (ba1 == null && ba2 == null)
return true;
if (ba1 == null)
return false;
if (ba2 == null)
return false;
if (ba1.Length != ba2.Length)
return false;
for (int i = 0; i < ba1.Length; i++)
{
Console.WriteLine("i: " + i.ToString() + " ba1: " + ba1[i].ToString() + " ba2: " + ba2[i].ToString());
}
for (int i = 0; i < ba1.Length; i++)
{
if (ba1[i] != ba2[i])
return false;
}
return true;
}
}
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