setting XML attribute

setting XML attribute

• canadian_coder

  This XmlTextWriter is not linked to your document, replace the above block of code with this:

  try
  {
  XmlNodeList nodelst = _doc.GetElementsByTagName("row");
  // XmlReader rr = nodelst;
  foreach (XmlNode node in nodelst)
  {
  XmlAttribute attr = node.Attributes["type"];
  attr.Value = "header";
  }
  }
  XmlTextWriter tr = new XmlTextWriter("tabledata.xml", null);
  tr.Formatting = Formatting.Indented;
  _doc.WriteContentTo(tr);

  tr.Close();

  
  
  

• Here2Play

  i've all ready writen so much to a file using a seperate xmltextwriter. but whenever i call the new one the file is completely empted of all tags. do you have to copy what is in the file allready somewhere then re-write the whole file
  
  
  

• ClemsonTigers71

  cool, i've created an xml document and set it up with this code
  
  _doc.Load("tabledata.xml");
  //intialize from tag
  XmlElement newform = _doc.CreateElement(formname);
  newform.SetAttribute("norows", tb_norows.Text);
  .......
  
  //initalize row tag
  for (int r = 0; r < norows; r++)
  {
  XmlElement newrow = _doc.CreateElement("row");
  newrow.SetAttribute("type", "");
  ......
  for (int c = 0; c < nocolumns; c++)
  {
  XmlElement newcolumn = _doc.CreateElement("column");
  newcolumn.SetAttribute("no", Convert.ToString(c));
  .......
  newrow.AppendChild(newcolumn);
  }
  newform.AppendChild(newrow);
  }
  add row tag to form
  _doc.DocumentElement.AppendChild(newform);
  
  XmlTextWriter tr = new XmlTextWriter("tabledata.xml", null);
  tr.Formatting = Formatting.Indented;
  _doc.WriteContentTo(tr);
  tr.Close();
  
  so what i want to do now is change one of the element attributes to a different value with the code before.
  i can get the file created and initally filled. then on the event i can select the right node and attribute with this code:-
  XmlNodeList nodelst = _doc.GetElementsByTagName("row");
  // XmlReader rr = nodelst;
  foreach (XmlNode node in nodelst)
  {
  XmlAttribute attr = node.Attributes["type"];
  attr.Value = "header";
  tr.Flush();
  }
  however whenever i use the xmltextwriter it clears what is allready there in the file.
  that is all the code i have in the project that has anything to do with xml
  
  by the by thanks for the help
  
  
  
  

• jhikel

  The flush method writes the file physicaly from memory to the drive.
  
  

• Tariq Mehmood

  Place the tr.Flush() after the _doc.WriteContentTo(tr)
  
  

• FinnErik

  XmlTextWriter tr = new XmlTextWriter("tabledata.xml",null);
  try
  {
  XmlNodeList nodelst = _doc.GetElementsByTagName("row");
  // XmlReader rr = nodelst;
  foreach (XmlNode node in nodelst)
  {
  XmlAttribute attr = node.Attributes["type"];
  attr.Value = "header";
  attr.WriteTo(tr.);
  tr.Flush();
  }
  }
  
  sorry missed that bit out by mistake
  
  

• Mrzev

  How did you use the XmlTextWriter Maybe you forgot to flush the file.
  
  

• Peter Wellington

  What other TextWriter I don't see it in your code. Did you fill it with the right XmlDoc
  
  

• mistry_bhavin

  that worked. thank you so much for you time and patiants.
  
  thank you, thank you thank you.
  
  

• Mair&amp;#233;ad - MSFT

  i created a new xmltextwriter in the procedure. however didnt flush it.
  
  sorry im quite new to using xml but would flushing the file do
  
  
  
  

• Loadstone

  that part works fine and does create the output, adding the flush there has still makes the file empty when it hits the second xmltextwriter(which is in another procedure).
  
  

• markgoldin

  Can you show me a bit more code, cause I'm not sure what you mean.
  
  
• setting XML attribute