How to serialize google sitemap in C # using XmlSerializer

Question

I want to serialize as follows

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9"> </urlset> 

But the wrong result worked.

My class is here

 [Serializable] [XmlRoot("urlset")] public class GoogleSiteMap { public GoogleSiteMap() { xmlns = "http://www.sitemaps.org/schemas/sitemap/0.9"; xmlnsNews = "http://www.google.com/schemas/sitemap-news/0.9"; Urls = new List<gUrlBase>(); } [XmlAttribute] public string xmlns { get; set; } [XmlAttribute("news",Namespace="xmlns")] public string xmlnsNews { get; set; } [XmlElement("url")] public List<gUrlBase> Urls { get; set; } } 

Serializer here

 public static void GenerateGoogle(GoogleSiteMap smap,string filePath) { XmlSerializer ser = new XmlSerializer(typeof(GoogleSiteMap)); using (FileStream fs = new FileStream(filePath, FileMode.Create)) { ser.Serialize(fs, smap); fs.Close(); } } 

Then the result is here

 <urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:d1p1="xmlns" d1p1:news="http://www.google.com/schemas/sitemap-news/0.9"/> 

What is wrong with my class declaration?

Another QUESTION 2

How can I declare it as

 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9"> <url> <loc>http://www.example.org/business/article55.html</loc> <news:news></news:news> </url> <url> <loc>http://www.example.org/business/page1.html</loc> <lastmod>2010-10-10</lastmod> <changefreq>weekly</changefreq> </url> </urlset> 

my declaration is here

 [XmlRoot("urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")] public class GoogleSiteMap { public GoogleSiteMap() { Urls = new List<gUrlBase>(); } //[XmlElement("url")] [XmlElement("url",Type = typeof(gNormalUrl))] [XmlElement("url",Type = typeof(gNewsUrl))] public List<gUrlBase> Urls { get; set; } } 

This is a return error

The XML element 'url' from namespace 'http://www.sitemaps.org/schemas/sitemap/0.9' is already present in the current scope. Use XML attributes to specify another XML name or namespace for the element.

How can I declare the same root name "url"?

Answer 1

You need to use the correct namespace:

 [XmlRoot("urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")] 

you can select the xmlns and xmlnsNews - they do something else. Likewise, any data in " http://www.google.com/schemas/sitemap-news/0.9 " should be flagged as such. Regardless of whether the news namespace alias is irrelevant (this is just an alias), it can be controlled with XmlSerializerNamespaces if you like. You do not need [Serializable] .

For example, if each <url> must be in the http://www.google.com/schemas/sitemap-news/0.9 namespace and you want to use " http://www.sitemaps.org/schemas/sitemap/0.9 "as a common namespace and http://www.google.com/schemas/sitemap-news/0.9 " aliased as "news", then:

 static class Program { static void Main() { var ns = new XmlSerializerNamespaces(); ns.Add("", "http://www.sitemaps.org/schemas/sitemap/0.9"); ns.Add("news", "http://www.google.com/schemas/sitemap-news/0.9"); var ser = new XmlSerializer(typeof (GoogleSiteMap)); var obj = new GoogleSiteMap {Urls = new List<string> {"abc", "def", "ghi"}}; ser.Serialize(Console.Out, obj, ns); } } [XmlRoot("urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")] public class GoogleSiteMap { [XmlElement("url", Namespace = "http://www.google.com/schemas/sitemap-news/0.9")] public List<string> Urls { get; set; } } 

This generates:

 <urlset xmlns:news="http://www.google.com/schemas/sitemap-news/0.9" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <news:url>abc</news:url> <news:url>def</news:url> <news:url>ghi</news:url> </urlset> 

(I did not check what the namespaces of the actual content are - it is just to show the relationship between namespaces in data, namespaces in xml and namespace aliases)

---

Repeat your editing - something like:

 static class Program { static void Main() { var ns = new XmlSerializerNamespaces(); ns.Add("", "http://www.sitemaps.org/schemas/sitemap/0.9"); ns.Add("news", "http://www.google.com/schemas/sitemap-news/0.9"); var ser = new XmlSerializer(typeof (GoogleSiteMap)); var obj = new GoogleSiteMap {Urls = { new SiteUrl { Location = "http://www.example.org/business/article55.html", News = ""}, new SiteUrl { Location = "http://www.example.org/business/page1.html", LastModified = new DateTime(2010,10,10), ChangeFrequency = "weekly"} }}; ser.Serialize(Console.Out, obj, ns); } } [XmlRoot("urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")] public class GoogleSiteMap { private readonly List<SiteUrl> urls = new List<SiteUrl>(); [XmlElement("url")] public List<SiteUrl> Urls { get { return urls; } } } public class SiteUrl { [XmlElement("loc")] public string Location { get; set; } [XmlElement("news", Namespace = "http://www.google.com/schemas/sitemap-news/0.9")] public string News { get; set; } [XmlElement("lastmod")] public DateTime? LastModified { get; set; } [XmlElement("changefreq")] public string ChangeFrequency { get; set; } public bool ShouldSerializeLastModified() { return LastModified.HasValue; } } 

which generates:

 <urlset xmlns:news="http://www.google.com/schemas/sitemap-news/0.9" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <url> <loc>http://www.example.org/business/article55.html</loc> <news:news /> </url> <url> <loc>http://www.example.org/business/page1.html</loc> <lastmod>2010-10-10T00:00:00</lastmod> <changefreq>weekly</changefreq> </url> </urlset> 

Answer 2

Please use below full code made by me

Please see the full code below.

 #region GoogleNewsSiteMap Class [XmlRoot("urlset", Namespace = "http://www.sitemaps.org/schemas/sitemap/0.9")] public class GoogleNewsSiteMap { const string _newsSiteMapSchema = "http://www.google.com/schemas/sitemap-news/0.9"; const string _newsSiteMapPrefix = "n"; public void Create(string loc, string prioity, string language, string name, string genres, string publicationDate, string title) { NewsSiteMap news = new NewsSiteMap(); news.Loc = loc; news.Priority = prioity; news.NewsSiteMapNews.Publication.Language = language; news.NewsSiteMapNews.Publication.Name = name; news.NewsSiteMapNews.Genres = genres; news.NewsSiteMapNews.PublicationDate = publicationDate; news.NewsSiteMapNews.Title = title; List.Add(news); } public string GetXMLString() { XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; settings.IndentChars = (" "); settings.Encoding = new UTF8Encoding(false); using (StringWriter str = new StringWriter()) using (XmlWriter writer = XmlWriter.Create(str, settings)) { XmlSerializerNamespaces ns = new XmlSerializerNamespaces(); ns.Add(_newsSiteMapPrefix, _newsSiteMapSchema); XmlSerializer xser = new XmlSerializer(typeof(GoogleNewsSiteMap)); xser.Serialize(writer, this, ns); return str.ToString(); } } private List<NewsSiteMap> _list = null; [XmlElement("url")] public List<NewsSiteMap> List { get { if (_list == null) { _list = new List<NewsSiteMap>(); } return _list; } } #region NewsSiteMap Class public class NewsSiteMap { private string _loc = string.Empty; private string _priority = string.Empty; private NewsSiteMap_News _newsSiteMap_News = null; [XmlElement("loc")] public string Loc { get { return _loc; } set { _loc = value; } } [XmlElement("priority")] public string Priority { get { return _priority; } set { _priority = value; } } [XmlElement("news", Namespace = _newsSiteMapSchema)] public NewsSiteMap_News NewsSiteMapNews { get { if (_newsSiteMap_News == null) { _newsSiteMap_News = new NewsSiteMap_News(); } return _newsSiteMap_News; } set { _newsSiteMap_News = value; } } #region NewsSiteMap_News Class public class NewsSiteMap_News { private NewsSiteMap_Publication _publication = null; private string _genres = string.Empty; private string _publicationDate = string.Empty; private string _title = string.Empty; private string _keywords = string.Empty; private string _stockTickers = string.Empty; [XmlElement("publication", Namespace = _newsSiteMapSchema)] public NewsSiteMap_Publication Publication { get { if (_publication == null) { _publication = new NewsSiteMap_Publication(); } return _publication; } set { _publication = value; } } [XmlElement("genres")] public string Genres { get { return _genres; } set { _genres = value; } } [XmlElement("publication_date")] public string PublicationDate { get { try { return string.Format("{0:s}", Convert.ToDateTime(_publicationDate)) + string.Format("{0:zzz}", Convert.ToDateTime(_publicationDate)); } catch (Exception ex) { return _publicationDate; } } set { _publicationDate = value; } } public string Title { set { _title = value; } } [XmlElement("title")] public XmlCDataSection CTitle { get { XmlDocument doc = new XmlDocument(); return doc.CreateCDataSection(_title); } set { _title = value.Value; } } [XmlElement("keywords")] public string Keywords { get { return _keywords; } set { _keywords = value; } } [XmlElement("stock_tickers")] public string StockTickers { get { return _stockTickers; } set { _stockTickers = value; } } #region NewsSiteMap_Publication Class public class NewsSiteMap_Publication { private string _name = string.Empty; private string _language = string.Empty; [XmlElement("name")] public string Name { get { return _name; } set { _name = value; } } [XmlElement("language")] public string Language { get { return _language; } set { _language = value; } } } #endregion NewsSiteMap_Publication Class } #endregion NewsSiteMap_News Class } #endregion NewsSiteMap Class } #endregion GoogleNewsSiteMap Class 

Using

 Response.Clear(); Response.ContentType = "text/xml"; Response.ContentEncoding = System.Text.Encoding.UTF8; GoogleNewsSiteMap googleNewsSiteMap = new GoogleNewsSiteMap(); googleNewsSiteMap.Create(/*put ur data*/); Response.Write(googleNewsSiteMap.GetXMLString());