Hilfe: Das Präfix '' kann nicht neu definiert werden von '' zu 'http://www.sitemaps.org/schemas/sitemap/0.9' innerhalb des gleichen Start-Element-Tags

Question

Ich habe diesen Fehler zu bekommen, wie kann ich lösen dies, Code unten.

Dim writer As XmlWriter = XmlWriter.Create(FileLocation + "StaticUrls3.xml") 
    Dim urlList As New List(Of String) 

    urlList.Add("link1") 
    urlList.Add("link2") 
    urlList.Add("link3")  

    writer.WriteStartDocument() 
    writer.WriteStartElement("urlset") 
    writer.WriteAttributeString("xmlns", "http://www.sitemaps.org/schemas/sitemap/0.9") 

    For Each aUrl As String In urlList 
     writer.WriteStartElement("url") 
     writer.WriteElementString("loc", aUrl) 
     writer.WriteEndElement() 
    Next 

    writer.WriteEndElement() 
    writer.WriteEndDocument() 
    writer.Close() 

Answer 1

Try this:

Const siteMapNamespace As String = "http://www.sitemaps.org/schemas/sitemap/0.9" 
Dim writer As XmlWriter = XmlWriter.Create(FileLocation + "StaticUrls3.xml") 
Dim urlList As New List(Of String) 

urlList.Add("link1") 
urlList.Add("link2") 
urlList.Add("link3")  

writer.WriteStartDocument() 
writer.WriteStartElement("urlset", siteMapNamespace) 

For Each aUrl As String In urlList 
    writer.WriteStartElement("url", siteMapNamespace) 
    writer.WriteElementString("loc", aUrl) 
    writer.WriteEndElement() 
Next 

writer.WriteEndElement() 
writer.WriteEndDocument() 
writer.Close()