public static void Main(string[] args)
{
var catalog = new XmlCatalog();
var artists = catalog.ExtractData();
#region Problem 2. DOM Parser: Extract Album Names
var artistsAlbumsNames = artists.Select(a => string.Join(",", a.Albums.Select(alb => alb.Name).ToList())).ToList();
Console.WriteLine("[" + string.Join(",", artistsAlbumsNames) + "]");
#endregion
#region Problem 3. DOM Parser: Extract All Artists Alphabetically
var artistsNames = artists.Select(a => a.Name).ToList();
var setArtistsNames = new HashSet<string>(artistsNames);
Console.WriteLine("[" + string.Join(",", setArtistsNames) + "]");
#endregion
#region Problem 4. DOM Parser: Extract Artists and Number of Albums
var artistsNumberAlbums = new Dictionary<string, int>();
foreach (var artist in artists)
{
var artistName = artist.Name;
var albumsNumber = artist.Albums.Count();
artistsNumberAlbums.Add(artistName, albumsNumber);
}
var artistsNumberAlbumsStr = artistsNumberAlbums.Select(a => a.Key + ":" + a.Value).ToList();
Console.WriteLine("[" + string.Join(",", artistsNumberAlbumsStr) + "]");
#endregion
#region Problem 5. XPath: Extract Artists and Number of Albums
var artistsNamesNumberAlbums =
catalog.Document.Document.XPathSelectElements("/music/artist")
.ToDictionary(a => a.Attribute("name").Value, a => a.Elements("album").Count());
artistsNumberAlbumsStr = artistsNamesNumberAlbums.Select(a => a.Key + ":" + a.Value).ToList();
Console.WriteLine("[" + string.Join(",", artistsNumberAlbumsStr) + "]");
#endregion
#region Problem 6. DOM Parser: Delete Albums
var elements = catalog.Document.XPathSelectElements("music/artist/album[@price > 20]");
elements.Remove();
catalog.Document.Save("../../cheap-albums-catalog.xml");
#endregion
#region Problem 7. DOM Parser and XPath: Old Albums
catalog = new XmlCatalog();
DateTime date = DateTime.Now;
date = date.AddYears(-5);
var query = string.Format("music/artist/album[number(translate(@pub-date,'-','')) < {0}]", date.ToString("yyyyMMdd"));
catalog.Document.XPathSelectElements(query).Remove();
var artistsOldAlbums = catalog.ExtractData();
var albumsNames = artistsOldAlbums.Select(a => string.Join(",", a.Albums.Select(alb => alb.Name).ToList())).ToList();
Console.WriteLine("[" + string.Join(",", albumsNames) + "]");
#endregion
#region Problem 8. LINQ to XML: Old Albums
catalog = new XmlCatalog();
var albumsNamesPrices = from album in catalog.Document.Root.Elements("album")
where DateTime.Parse(album.Attribute("pub-date").Value) > date
select
new { Title = album.Attribute("title").Value, Price = album.Attribute("price").Value };
Console.WriteLine("[" + string.Join(",", albumsNames) + "]");
#endregion
}
public static void Main(string[] args)
{
var catalog = new XmlCatalog();
var artists = catalog.ExtractData();
#region Problem 2. DOM Parser: Extract Album Names
var artistsAlbumsNames = artists.Select(a => string.Join(",", a.Albums.Select(alb => alb.Name).ToList())).ToList();
Console.WriteLine("[" + string.Join(",", artistsAlbumsNames) + "]");
#endregion
#region Problem 3. DOM Parser: Extract All Artists Alphabetically
var artistsNames = artists.Select(a => a.Name).ToList();
var setArtistsNames = new HashSet <string>(artistsNames);
Console.WriteLine("[" + string.Join(",", setArtistsNames) + "]");
#endregion
#region Problem 4. DOM Parser: Extract Artists and Number of Albums
var artistsNumberAlbums = new Dictionary <string, int>();
foreach (var artist in artists)
{
var artistName = artist.Name;
var albumsNumber = artist.Albums.Count();
artistsNumberAlbums.Add(artistName, albumsNumber);
}
var artistsNumberAlbumsStr = artistsNumberAlbums.Select(a => a.Key + ":" + a.Value).ToList();
Console.WriteLine("[" + string.Join(",", artistsNumberAlbumsStr) + "]");
#endregion
#region Problem 5. XPath: Extract Artists and Number of Albums
var artistsNamesNumberAlbums =
catalog.Document.Document.XPathSelectElements("/music/artist")
.ToDictionary(a => a.Attribute("name").Value, a => a.Elements("album").Count());
artistsNumberAlbumsStr = artistsNamesNumberAlbums.Select(a => a.Key + ":" + a.Value).ToList();
Console.WriteLine("[" + string.Join(",", artistsNumberAlbumsStr) + "]");
#endregion
#region Problem 6. DOM Parser: Delete Albums
var elements = catalog.Document.XPathSelectElements("music/artist/album[@price > 20]");
elements.Remove();
catalog.Document.Save("../../cheap-albums-catalog.xml");
#endregion
#region Problem 7. DOM Parser and XPath: Old Albums
catalog = new XmlCatalog();
DateTime date = DateTime.Now;
date = date.AddYears(-5);
var query = string.Format("music/artist/album[number(translate(@pub-date,'-','')) < {0}]", date.ToString("yyyyMMdd"));
catalog.Document.XPathSelectElements(query).Remove();
var artistsOldAlbums = catalog.ExtractData();
var albumsNames = artistsOldAlbums.Select(a => string.Join(",", a.Albums.Select(alb => alb.Name).ToList())).ToList();
Console.WriteLine("[" + string.Join(",", albumsNames) + "]");
#endregion
#region Problem 8. LINQ to XML: Old Albums
catalog = new XmlCatalog();
var albumsNamesPrices = from album in catalog.Document.Root.Elements("album")
where DateTime.Parse(album.Attribute("pub-date").Value) > date
select
new { Title = album.Attribute("title").Value, Price = album.Attribute("price").Value };
Console.WriteLine("[" + string.Join(",", albumsNames) + "]");
#endregion
}