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DaST Concept: A simpler, smarter, and much more powerful alternative to Forms and MVC.

, 12 May 2011
Pure HTML templates and uniform codebehind is the future of web development. The article presents ASP.NET DaST Rendering Engine and its underlying DaST concept that brings web apps architecture to a new level getting rid of all problems and complexity related to standard ASP.NET Forms and MVC.
VideoLibraryDEMO_1.14.zip
VideoLibraryDEMO_1.14
App_Code
Controllers
App_Data
Data
Templates
Bin
AspNetDaST.dll
Global.asax
res
CSS
images
ajax-loader.gif
jQuery
Themes
le-frog
images
ui-bg_diagonals-small_0_aaaaaa_40x40.png
ui-bg_diagonals-thick_15_444444_40x40.png
ui-bg_diagonals-thick_95_ffdc2e_40x40.png
ui-bg_glass_55_fbf5d0_1x400.png
ui-bg_highlight-hard_30_285c00_1x100.png
ui-bg_highlight-soft_33_3a8104_1x100.png
ui-bg_highlight-soft_50_4eb305_1x100.png
ui-bg_highlight-soft_60_4ca20b_1x100.png
ui-bg_inset-soft_10_285c00_1x100.png
ui-icons_4eb305_256x240.png
ui-icons_72b42d_256x240.png
ui-icons_cd0a0a_256x240.png
ui-icons_ffffff_256x240.png
start
images
ui-bg_flat_55_999999_40x100.png
ui-bg_flat_75_aaaaaa_40x100.png
ui-bg_glass_45_0078ae_1x400.png
ui-bg_glass_55_f8da4e_1x400.png
ui-bg_glass_75_79c9ec_1x400.png
ui-bg_gloss-wave_45_e14f1c_500x100.png
ui-bg_gloss-wave_50_6eac2c_500x100.png
ui-bg_gloss-wave_75_2191c0_500x100.png
ui-bg_inset-hard_100_fcfdfd_1x100.png
ui-icons_0078ae_256x240.png
ui-icons_056b93_256x240.png
ui-icons_d8e7f3_256x240.png
ui-icons_e0fdff_256x240.png
ui-icons_f5e175_256x240.png
ui-icons_f7a50d_256x240.png
ui-icons_fcd113_256x240.png
sunny
images
ui-bg_diagonals-medium_20_d34d17_40x40.png
ui-bg_flat_30_cccccc_40x100.png
ui-bg_flat_50_5c5c5c_40x100.png
ui-bg_gloss-wave_45_817865_500x100.png
ui-bg_gloss-wave_60_fece2f_500x100.png
ui-bg_gloss-wave_70_ffdd57_500x100.png
ui-bg_gloss-wave_90_fff9e5_500x100.png
ui-bg_highlight-soft_100_feeebd_1x100.png
ui-bg_inset-soft_30_ffffff_1x100.png
ui-icons_3d3d3d_256x240.png
ui-icons_bd7b00_256x240.png
ui-icons_d19405_256x240.png
ui-icons_eb990f_256x240.png
ui-icons_ed9f26_256x240.png
ui-icons_fadc7a_256x240.png
ui-icons_ffe180_256x240.png
swanky-purse
images
ui-bg_diamond_10_4f4221_10x8.png
ui-bg_diamond_20_372806_10x8.png
ui-bg_diamond_25_675423_10x8.png
ui-bg_diamond_25_d5ac5d_10x8.png
ui-bg_diamond_8_261803_10x8.png
ui-bg_diamond_8_443113_10x8.png
ui-bg_flat_75_ddd4b0_40x100.png
ui-bg_highlight-hard_65_fee4bd_1x100.png
ui-icons_070603_256x240.png
ui-icons_e8e2b5_256x240.png
ui-icons_e9cd86_256x240.png
ui-icons_efec9f_256x240.png
ui-icons_f2ec64_256x240.png
ui-icons_f9f2bd_256x240.png
ui-icons_ff7519_256x240.png
ui-darkness
images
ui-bg_flat_30_cccccc_40x100.png
ui-bg_flat_50_5c5c5c_40x100.png
ui-bg_glass_20_555555_1x400.png
ui-bg_glass_40_0078a3_1x400.png
ui-bg_glass_40_ffc73d_1x400.png
ui-bg_gloss-wave_25_333333_500x100.png
ui-bg_highlight-soft_80_eeeeee_1x100.png
ui-bg_inset-soft_25_000000_1x100.png
ui-bg_inset-soft_30_f58400_1x100.png
ui-icons_222222_256x240.png
ui-icons_4b8e0b_256x240.png
ui-icons_a83300_256x240.png
ui-icons_cccccc_256x240.png
ui-icons_ffffff_256x240.png
ui-lightness
images
ui-bg_diagonals-thick_18_b81900_40x40.png
ui-bg_diagonals-thick_20_666666_40x40.png
ui-bg_flat_10_000000_40x100.png
ui-bg_glass_100_f6f6f6_1x400.png
ui-bg_glass_100_fdf5ce_1x400.png
ui-bg_glass_65_ffffff_1x400.png
ui-bg_gloss-wave_35_f6a828_500x100.png
ui-bg_highlight-soft_100_eeeeee_1x100.png
ui-bg_highlight-soft_75_ffe45c_1x100.png
ui-icons_222222_256x240.png
ui-icons_228ef1_256x240.png
ui-icons_ef8c08_256x240.png
ui-icons_ffd27a_256x240.png
ui-icons_ffffff_256x240.png
// VideoLibrary DEMO - DaST Technology Demonstrator
// Copyright (C) 2011 Roman Gubarenko 
// http://www.rgubarenko.net
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
// 
// Licence terms for AspNetDaST.dll (in Bin folder) are below.
// 
// ASP.NET DaST Rendering Engine (BETA version)
// Copyright (C) 2011 Roman Gubarenko
// http://www.rgubarenko.net
// 
// Redistribution and use of BETA version of DaST Rendering Engine 
// is permitted in binary form without modification. Only original and
// unmodified .NET dll (AspNetDaST.dll) can be used in your own projects and 
// redistributed. You may not copy, decompile, reverse engineer, disassemble, 
// modify, or create derivative works of the software or any part thereof.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE.
//
// DaST technology dev site: http://www.rgubarenko.net
// My contact email for questions: rgubarenko@gmail.com


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Xml.Linq;
using System.Web.Hosting;
using System.IO;

/// <summary>
/// Summary description for DataLayer
/// </summary>
public static class DataLayer
{
  private static XElement XmlDoc
  {
    get
    {
      var xmlDoc = HttpContext.Current.Session["Data.XmlDocument"] as XElement;
      if (xmlDoc == null)
      {
        string dataPath = HostingEnvironment.MapPath("~/App_Data/Data/VideoLibrarySource.xml");
        xmlDoc = XElement.Parse(File.ReadAllText(dataPath));
        HttpContext.Current.Session["Data.XmlDocument"] = xmlDoc;
      }
      return xmlDoc;
    }
  }

  public static int GetVideoItemCount(string videoCategory)
  {
    return (from video in XmlDoc.Elements("Video")
            where videoCategory == null || video.Element("Category").Value == videoCategory
            select video).Count();
  }

  public static object[] GetVideoItems(int startIdx, int count, string videoCategory)
  {
    return (from video in XmlDoc.Elements("Video")
            where videoCategory == null || video.Element("Category").Value == videoCategory
            let commElems = video.Element("Comments").Elements("Comment")
            select new
            {
              ID = video.Element("ID").Value,
              Name = video.Element("Name").Value,
              Category = video.Element("Category").Value,
              Description = video.Element("Description").Value,
              CommCount = commElems.Count(),
              Rating = commElems.Count() > 0 ? commElems.Average(elem => decimal.Parse(elem.Element("Rated").Value)) : 0.0m
            }).Skip(startIdx).Take(count).ToArray();
  }

  public static object GetVideoItem(string videoID)
  {
    var videoElem = (from video in XmlDoc.Elements("Video")
                     where video.Element("ID").Value == videoID
                     select video).Single();

    var commElems = videoElem.Element("Comments").Elements("Comment");
 
    return new
    {
      ID = videoElem.Element("ID").Value,
      Name = videoElem.Element("Name").Value,
      Category = videoElem.Element("Category").Value,
      Description = videoElem.Element("Description").Value,
      CommCount = commElems.Count(),
      Rating = commElems.Count() > 0 ? commElems.Average(elem => decimal.Parse(elem.Element("Rated").Value)) : 0.0m
    };
  }

  public static object[] GetVideoComments(int startIdx, int count, string videoID)
  {
    var videoElem = (from video in XmlDoc.Elements("Video")
                     where video.Element("ID").Value == videoID
                     select video).Single();

    return (from comm in videoElem.Element("Comments").Elements("Comment")
            select new
            {
              CommID = comm.Element("ID").Value,
              Date = comm.Element("Time").Value,
              Author = comm.Element("Name").Value,
              Rated = int.Parse(comm.Element("Rated").Value),
              Text = comm.Element("Text").Value
            }).Skip(startIdx).Take(count).ToArray();
  }

  public static void AddNewComment(string videoID, string name, int rated, string comment)
  {
    var videoElem = (from video in XmlDoc.Elements("Video")
                     where video.Element("ID").Value == videoID
                     select video).Single();

    videoElem.Element("Comments").Add(new XElement("Comment",
      new XElement("ID", Guid.NewGuid()),
      new XElement("Time", DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss")),
      new XElement("Name", name),
      new XElement("Rated", rated),
      new XElement("Text", comment)));
  }


  #region Playlist simulation 
 
  private static List<string> PlaylistVideoItems
  {
    get
    {
      var playlist = HttpContext.Current.Session["DaST.VideoLibrary.PlaylistVideoItems"] as List<string>;
      if (playlist == null)
      {
        playlist = new List<string>();
        HttpContext.Current.Session["DaST.VideoLibrary.PlaylistVideoItems"] = playlist;
      }

      return playlist;
    }
  }

  public static int GetPlayItemCount()
  {
    return PlaylistVideoItems.Count;
  }

  public static object[] GetPlayItems(int startIdx, int count)
  {
    var videoIDs = PlaylistVideoItems.Skip(startIdx).Take(count);

    return (from videoID in videoIDs
            select GetVideoItem(videoID)).ToArray();
  }

  public static void AddToPlaylist(string videoID)
  {
    if (!PlaylistVideoItems.Contains(videoID))
    {
      PlaylistVideoItems.Add(videoID);
    }
  }

  public static void RemoveFromPlaylist(string videoID)
  {
    if (PlaylistVideoItems.Contains(videoID))
    {
      PlaylistVideoItems.Remove(videoID);
    }
  }

  public static bool CheckPlaylistContains(string videoID)
  {
    return PlaylistVideoItems.Contains(videoID);
  }

  #endregion


  public static int[] GetAvailablePageSizes()
  {
    return new int[] { 3, 5, 10, 20, 40 };
  }

  public static string[] GetAvailableThemes()
  {
    //string strPath = HostingEnvironment.MapPath("~/App_Themes");
    //string[] dirs = Directory.GetDirectories(strPath);
    //return dirs.Select(str => Path.GetFileName(str)).ToArray();
    return new string[] { "ui-lightness", "ui-darkness", "start", "sunny", "le-frog", "swanky-purse" };
  }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

rgubarenko
Software Developer (Senior)
Canada Canada
Software Architect with over 15 years in IT field. Started with deep math and C++ Computer Vision software. Currently in .NET and PHP web development. Creator of DaST pattern, open-source frameworks, and plugins. Interested in cutting Edge IT, open-source, Web 2.0, .NET, MVC, C++, Java, jQuery, Mobile tech, and extreme sports.
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Web03 | 2.8.140821.2 | Last Updated 12 May 2011
Article Copyright 2011 by rgubarenko
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