How to check if xml file is empty or not using C #

Question

Hi everyone, I want to check my xml file if it is empty or not. I am trying to update one XML data for another. I am using the following code. Now please tell me how can I check if there is data in my XML file or not? Here is the code I use to update my xml file

protected void CheckUpdates()
{
    StringReader strReader = new StringReader("..\\xml\\Updatelist.xml");
    XmlReader reader = XmlReader.Create(strReader);
    try
    {
       while (reader.Read())
       {
           var originalXmlDoc = XDocument.Load("..\\xml\\list.xml"); var newXmlDoc = XDocument.Load("..\\xml\\Updatelist.xml");

           foreach (var newElement in newXmlDoc.Element("blocker").Elements("lst"))
           {
               newElement.Value.Trim();
               if (!originalXmlDoc.Element("blocker").Elements("lst")
                       .Any(oldElement => oldElement.Value.Trim().Equals(
                       newElement.Value.Trim(),
                       StringComparison.InvariantCultureIgnoreCase)))
                {
                   originalXmlDoc.Element("blocker").Add(new XElement("lst", newElement.Value));
                }
             }
             originalXmlDoc.Save("..\\xml\\list.xml", SaveOptions.None);

             XmlDocument doc = new XmlDocument();
             doc.Load("..\\xml\\Updatelist.xml");
             doc.DocumentElement.RemoveAll();
             doc.Save("..\\xml\\Updatelist.xml");
          }
       }
    catch (XmlException ex)
    {
       //Catch xml exception
       //in your case: root element is missing
    }
}

I get this error

Data at the root level is invalid. Line 1, position 1.

Please tell me how can I check if mine is empty Updatelist.xmlor not?

Now i get this error

Answer 1

Two ways to do this.

- , , - . , ChildNodes XML DOM.

XmlDocument xDoc = new XmlDocument();
if (xDoc.ChildNodes.Count == 0) { 
    // It is empty 
}else if (xDoc.ChildNodes.Count == 1) { 
    // There is only one child, probably the declaration node at the beginning
}else if (xDoc.ChildNodes.Count > 1) { 
    // There are more children on the **root level** of the DOM
}

- XMLException, .

try
{
    XmlDocument doc = new XmlDocument();
    doc.Load("test.xml");
}
catch (XmlException exc)
{
    //invalid file
}

, !

Answer 2

XML XML- . :

var doc = new XmlDocument();
try {
  doc.LoadXml(content);
} catch (XmlException e) {
  // put code here that should be executed when the XML is not valid.
}

, .

()

( , ), :

public class MyXmlDocument: XmlDocument
{
  bool TryParseXml(string xml){
    try{
      ParseXml(xml);
      return true;
    }catch(XmlException e){
      return false;
    }
 }

, , .