int boxWidth = 100;
int boxHeight = 100;
double scale=0;
MemoryStream myImageStream = new MemoryStream();
MemoryStream myTumbsStream = new MemoryStream();
string fileName;
fileName = "mk45shot.jpg";
Bitmap InputBitmap = new Bitmap(Server.MapPath("../../images/" + fileName));

if(InputBitmap.Height < InputBitmap.Width)
{
	scale = ((double)boxHeight)/InputBitmap.Width;
}
else
{
	scale = ((double)boxWidth)/InputBitmap.Height;
}
InputBitmap.Save(myImageStream, ImageFormat.Jpeg);

int newWidth = (int)(scale*InputBitmap.Width);
int newHeight = (int)(scale*InputBitmap.Height);
Bitmap OutputBitmap = new Bitmap(InputBitmap, newWidth, newHeight);
OutputBitmap.Save(myTumbsStream, ImageFormat.Jpeg);
			
String imageName = fileName;
	
OracleConnection conn = new OracleConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
OracleCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "INTRANET.PKG_IMAGES.add_image";
			
cmd.Parameters.Clear();
cmd.Parameters.Add("t_userIP", OracleType.VarChar,255).Value = imageName;
cmd.Parameters.Add("t_imageNormal", OracleType.Blob).Value = myImageStream;
cmd.Parameters.Add("t_imageSmall", OracleType.Blob).Value = myTumbsStream;
			
conn.Open();
cmd.ExecuteReader(CommandBehavior.CloseConnection);

OutputBitmap.Dispose();
InputBitmap.Dispose();

System.InvalidCastException: Object must implement IConvertible.
Line  75 : 			
Line  76 : 			conn.Open();
Line  77 : 			cmd.ExecuteReader(CommandBehavior.CloseConnection);
Line  78 : 
Line  79 : 			OutputBitmap.Dispose();