assignment to xml node value

assignment to xml node value

• Jorne

  thanks too much for your help;;
  
  

• Chris Lively

  The InnerText property of an element will be the inner text so you should be able to do this:
  
  Id.InnerText= (a++).ToString();

  This takes the current value of a, converts it to a string, then increments a and finally assigns the string value to the node. Of course if you are incrementing a through some other means then simply call ToString().

  Michael Taylor - 8/2/06

  
  

• Tone Southerland

  i need only return value in my method ;

  could i write like this

  return nodeLast.InnerText = (++id).ToString(); ////is this true definition

  because i will use in my addannouncement method like this

  XmlNode Id = newAnnDoc.CreateNode(XmlNodeType.Element, "annID", null);

  Id.Value = GetID();

  
  
  

• DrJazz

  If you are guaranteed that the announcements will be sequentially incrementing then you can use an XPath query to retrieve the last announcement. Then get its InnerText value and convert it to an int. Increment the value and set the new announcement's InnerText to the result.

  If there are no announcements yet then the XPath query will return nothing so you should set the initial ID to 0 or whatever. If you can guarantee that all code goes through this same block then you technically only have to retrieve the ID once. After that you can store it in a member field and reuse it (assuming you can keep the instance lying around).
  
  If you are not guaranteed that the announcements are in order then you should use an XPath query to retrieve all the announcements, iterate through each one and save off the highest ID. Then increment the value and assign like earlier.

  static void Main ( string[] args )
  {
  //Load the document
  XmlDocument doc = new XmlDocument();
  doc.Load(...);
  
  int id = 0;
  
  //Find the last announcement and id
  XmlNode nodeLast = doc.SelectSingleNode("//anns/ann[position()=last()]");
  if (nodeLast != null)
  id = Convert.ToInt32(nodeLast.InnerText);
  
  //Create the new announcement
  XmlNode nodeNew = doc.CreateElement("ann");
  XmlNode nodeId = doc.CreateElement("annID");
  nodeId.InnerText = (++id).ToString();
  nodeNew.AppendChild(nodeId);
  
  //Save
  doc.DocumentElement.AppendChild(nodeNew);
  doc.Save(...);
  }

  Michael Taylor - 8/2/06

  
  

• todd_bulky

  ok thanks;

  how can i reach annpanel(root).lastchild.id.value from other method ; because i must get last child id no value and after increase it

  like this

  public int increaseid/// how must i write this code

  {

  a=0;

  annpanel.lastchild.id(this is my is node).value = a;/// i cant reach lastchild id value from addannouncement method

  return ++a;

  }

  how can i do this

  so after that i will do this

  id.value = increaseid();

  can you help me about this problem;

  
  
  

• charret

  The syntax you are using is wrong. If you want to return the last value used then do this:
  
  return Convert.ToInt32(nodeLast.InnerText);

  If you want the next value to use then do this:
  
  return ++Convert.ToInt32(nodeLast.InnerText);

  Michael Taylor - 8/2/06

  
  
• assignment to xml node value