OLE DB Object field to SQL image field migration c# - sql

Question

I am trying to migrate OLE object field (access 2003) to SQL 2005 field, now I managed to get Doc file working (function copied),
but no luck with EXCEL/PDF and other files.
short sFlag = 0;
int nIndex = 0;
int nCount = 0;
int nOffset = 0;
int nImgLen = 0;
int nReadbyte = 14400;
string szImgType = string.Empty;
if (bData.Length > 0)
{
MemoryStream memStream = new MemoryStream(bData, true);
byte[] bArray = new byte[nReadbyte];
nCount = memStream.Read(bArray, 0, nReadbyte);
if (bArray[78] == (byte)0x42 && bArray[79] == (byte)0x4D) //BMP FORMAT
{
sFlag = 1;
nOffset = 78;
szImgType = "image/bmp";
}
else
{
for (nIndex = 78; nIndex < nReadbyte - 2; nIndex++)
{
if (bArray[nIndex] == (byte)0xFF && bArray[nIndex + 1] == (byte)0xD8) //JPG FORMAT
{
sFlag = 2;
nOffset = nIndex;
szImgType = "image/pjpeg";
break;
}
else if (bArray[nIndex] == (byte)0x25 && bArray[nIndex + 1] == (byte)0x50) //PDF FORMAT
{
sFlag = 3;
nOffset = nIndex;
szImgType = "application/pdf";
FileType = "application/pdf";
break;
}
else if (bArray[nIndex] == (byte)0xD0 && bArray[nIndex + 1] == (byte)0xCF) //MSWORD FORMAT
{
sFlag = 4;
nOffset = nIndex;
szImgType = "application/msword";
FileType = "application/msword";
break;
}
}
}
if (sFlag > 0)
{
nImgLen = bData.Length - nOffset;
memStream.Position = 0;
memStream.Write(bData, nOffset, nImgLen);
memStream.Position = 0;
byte[] bImgData = bData; //new byte[nImgLen];
return bImgData;
}
else
{
return null;
}
}
else {
return null;
}
}
will like to know any pointers/ lookups to migrate ole objects to SQL 2005 fields.
-Prash