/// <summary> /// Asynchronously loads binary data of an image from the database using the DatabaseWorker. /// </summary> /// <param name="query">SQL query to be sent to the database</param> /// <returns>String representation of the binary data</returns> public string LoadDBImageAsync(string query) { DatabaseWorker dw = new DatabaseWorker(); byte[] contents = dw.binaryQueryDB(query); string base64string = Convert.ToBase64String(contents); LoadCompleted(new LoadCompletedEventArgs(base64string, null, false, null)); return base64string; }
/// <summary> /// Loads images from database synchronously. /// </summary> /// <returns>View of images</returns> public ActionResult GetImagesSynchronous() { DatabaseWorker dw = new DatabaseWorker(); DatabaseWorker.connectDB(); ViewBag.Images = new ArrayList(); ViewBag.Tables = new ArrayList(); for (int j = 0; j < 10; j++) { int count = dw.intQueryDB("select count(*) from Images"); for (int i = 1; i <= count; i++) { byte[] contents = dw.binaryQueryDB("select image from Images where imageID = " + i + " and exists (select * from ArticleAttachments where ImageID = " + i + ")"); // Place image contents in an array of images in viewbag ViewBag.Images.Add("data:image/jpeg;base64," + Convert.ToBase64String(contents)); } } DatabaseWorker.disconnectDB(); ViewBag.Title = "Synchronous Test Loading Media From Database"; return View("RegularQueries"); }
public ActionResult GetMediaCache() { DatabaseWorker dw = new DatabaseWorker(); DatabaseWorker.connectDB(); ViewBag.Tables = new ArrayList(); ViewBag.Images = new ArrayList(); for (int j = 0; j < 10; j++) { int count = dw.intQueryDB("select count(*) from Images"); for (int i = 1; i <= count; i++) { byte[] contents; object cached = HttpRuntime.Cache.Get("DB.Images." + i); if (cached == null) { contents = dw.binaryQueryDB("select image from Images where imageID = " + i + " and exists (select * from ArticleAttachments where ImageID = " + i + ")"); HttpRuntime.Cache.Insert("DB.Images." + i, contents, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(0, 1, 0)); } else { contents = (byte[])cached; } ViewBag.Images.Add("data:image/jpeg;base64," + Convert.ToBase64String(contents)); } } DatabaseWorker.disconnectDB(); ViewBag.Title = "Caching Test Loading Media From Database"; return View("RegularQueries"); }