ASP.Net Page to Return an Image from an SQL

protected void Page_Load(object sender, EventArgs e)
{
string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["ProductCatalogueConnectionString"].ConnectionString;
SqlConnection conn = new SqlConnection(connStr);
string blobId = Request.QueryString["ID"];
if (!string.IsNullOrEmpty(blobId))
{
string cmdText = "select A.blob from Core.Attachment A where A.AttachmentID = '" + blobId + "'";
conn.Open();
SqlCommand cmd = new SqlCommand(cmdText, conn);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
if (reader.Read())
{
byte[] imgBytes = (byte[])reader["blob"];
Response.ContentType = "image/jpeg";
Response.BinaryWrite(imgBytes);
}
}
}

Date Taken EXIF Data for a Picture

///

/// Returns the EXIF Image Data of the Date Taken.
///

/// Image (If based on a file use Image.FromFile(f);)
/// Date Taken or Null if Unavailable
public static DateTime? DateTaken(Image getImage)
{
int DateTakenValue = 0x9003; //36867;

if (!getImage.PropertyIdList.Contains(DateTakenValue))
return null;

string dateTakenTag = System.Text.Encoding.ASCII.GetString(getImage.GetPropertyItem(DateTakenValue).Value);

string[] parts = dateTakenTag.Split(':', ' ');
int year = int.Parse(parts[0]);
int month = int.Parse(parts[1]);
int day = int.Parse(parts[2]);
int hour = int.Parse(parts[3]);
int minute = int.Parse(parts[4]);
int second = int.Parse(parts[5]);

return new DateTime(year, month, day, hour, minute, second);
}

draw sine wave on Bitmap

string filename = @"C:\0\test.bmp";
int width = 640;

int height = 480;
Bitmap b = new Bitmap(width, height);

for (int i = 0; i < width; i++)
{
int y = (int)((Math.Sin((double)i*2.0*Math.PI/width )+1.0)*(height-1)/2.0);
b.SetPixel(i, y, Color.Black);
}

b.Save(filename);