I am writing to ask you about such question. So i have method which writes exception's info into xml file, but if some exception processed, this method replace all that it is in that file. I want that method write to end file a new info about exception
Code of my method is given below:
public void WriteIntoFile()
{
XDocument xdoc = new XDocument(
new XElement("Exceptions",
new XElement("Exception",
new XElement("Message",this.ErrorMessage.ToString())
)));
xdoc.Save("1.xml");
}
Please, help me with it
This should do the Job, assuming the file exists and you create a new node call "Exceptions".
public void WriteIntoFile(string Message)
{
const string Path = "C:\\Temp\\Log.xml";
XmlDocument MyDocument = new XmlDocument();
MyDocument.Load(Path);
XmlNode ExceptionsNode = MyDocument.CreateElement("Exceptions");
XmlNode ExceptionNode = MyDocument.CreateElement("Exception");
XmlNode MessageNode = MyDocument.CreateElement("Message");
MessageNode.InnerText = Message;
ExceptionNode.AppendChild(MessageNode);
ExceptionsNode.AppendChild(ExceptionNode);
MyDocument.AppendChild(ExceptionsNode);
}
if you want the "Exception"- Node append to a existing "Exceptions" node, use this:
XmlNode ExceptionsNode = MyDocument.SelectSingleNode("/Exceptions");
Greetings from Austria.
Related
I've read the other question and apply the answer to my code, but it still doesn't work.
I use xml to read the csproj file to read/write something into it body.
This is my csproject file if anyone care!
My code:
static void Main(string[] args)
{
string file = #"D:\Project\svn_longnx\LearnSvnRevision\ConsoleApp1\WindowsFormsApp1\WindowsFormsApp1.csproj";
XmlDocument xdoc = new XmlDocument();
xdoc.Load(file);
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xdoc.NameTable);
nsmgr.AddNamespace("default", "http://schemas.microsoft.com/developer/msbuild/2003");
XmlElement root = xdoc.DocumentElement;
XmlNode node = root.SelectSingleNode("Project/PropertyGroup/ApplicationVersion",nsmgr);
Console.WriteLine(node.Value);
}
This dummy code failed either:
static void Main(string[] args)
{
string file = #"D:\Project\svn_longnx\LearnSvnRevision\ConsoleApp1\WindowsFormsApp1\WindowsFormsApp1.csproj";
XmlDocument xdoc = new XmlDocument();
xdoc.Load(file);
XmlElement root = xdoc.DocumentElement;
XmlNode node = root.SelectSingleNode("Project/PropertyGroup/ApplicationVersion");
Console.WriteLine(node.Value);
}
It's much easier to use XDocument and associated objects instead of the older XmlDocument bits. Also, you're probably falling down because of namespaces. Instead, try this code:
var doc = XDocument.Load(#"D:\Project\svn_longnx\Lear...\WindowsFormsApp1.csproj");
var ns = XNamespace.Get("http://schemas.microsoft.com/developer/msbuild/2003");
var applicationVersionElements = doc.Element(ns + "Project")
.Descendants(ns + "PropertyGroup")
.Descendants(ns + "ApplicationVersion");
foreach (var element in applicationVersionElements)
{
Console.WriteLine(element.Name);
}
This is just one way as an example of how to get that specific element to demonstrate how easy it is to use.
Note, you may need to add using System.Xml.Linq;
I have a simple c# function that creates a basic XML file and saves:
private void CreateXMlFile(string Filename, string Name, string Company)
{
XmlDocument doc = new XmlDocument();
XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
doc.AppendChild(docNode);
XmlNode licenseNode = doc.CreateElement("license");
doc.AppendChild(licenseNode);
XmlNode node = doc.CreateElement("Name");
node.AppendChild(doc.CreateTextNode(Name));
licenseNode.AppendChild(node);
node = doc.CreateElement("Company");
node.AppendChild(doc.CreateTextNode(Company));
licenseNode.AppendChild(node);
doc.Save(Filename);
}
When I try to edit or delete the file I always get following error:
The process cannot access the file because it is being used by another
process.
XmlDocument doesnt have any inbuilt dispose or close routines and wondered how I can force the file to close before later editing or deleting it.
I have tried to save the file using StreamWriter:
StreamWriter outStream = System.IO.File.CreateText(outfile);
outStream.Write(data);
outStream.Close();
But this didnt make a difference with the same error.
Your advice is greatly accepted.
Thank you
Send Stream to XmlDocument's Save method instead of file name.
private static void Main(string[] args)
{
CreateXMlFile("c:\\test.xml", "testName", "testCompany");
}
private static void CreateXMlFile(string Filename, string Name, string Company)
{
XmlDocument doc = new XmlDocument();
XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
doc.AppendChild(docNode);
XmlNode licenseNode = doc.CreateElement("license");
doc.AppendChild(licenseNode);
XmlNode node = doc.CreateElement("Name");
node.AppendChild(doc.CreateTextNode(Name));
licenseNode.AppendChild(node);
node = doc.CreateElement("Company");
node.AppendChild(doc.CreateTextNode(Company));
licenseNode.AppendChild(node);
StreamWriter outStream = System.IO.File.CreateText(Filename);
doc.Save(outStream);
outStream.Close();
}
I tried executing above code and it is working fine at my end.
Your code is fine. I tested it on my machine and there is no lock left after Save().
Try to use Unlocker (http://www.softpedia.com/get/System/System-Miscellaneous/Unlocker.shtml) to check whether you are really the one who holds the lock.
Which .NET framework do you use? Theres also a report (http://bytes.com/topic/net/answers/467028-xmldocument-save-does-not-close-file-properly) which was not reproducable too.
I have this code :
string m_strFilePath = "http://www.google.com/ig/api?weather=12414&hl=it";
XmlDocument myXmlDocument = new XmlDocument();
myXmlDocument.LoadXml(m_strFilePath);
foreach (XmlNode RootNode in myXmlDocument.ChildNodes)
{
}
but when I try to execute it, I get this error :
Exception Details: System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1.
Why? Where am I wrong? And how can I fix this problem on C#?
Also tried with :
myXmlDocument.Load(m_strFilePath);
but I get :
Exception Details: System.Xml.XmlException: Invalid character in the given encoding. Line 1, position 503.
NOTE: You're really better off using XDocument for most XML parsing needs nowadays.
It's telling you that the value of m_strFilePath is not valid XML. Try:
string m_strFilePath = "http://www.google.com/ig/api?weather=12414&hl=it";
XmlDocument myXmlDocument = new XmlDocument();
myXmlDocument.Load(m_strFilePath); //Load NOT LoadXml
However, this is failing (for unknown reason... seems to be choking on the à of Umidità). The following works (still trying to figure out what the difference is though):
var m_strFilePath = "http://www.google.com/ig/api?weather=12414&hl=it";
string xmlStr;
using(var wc = new WebClient())
{
xmlStr = wc.DownloadString(m_strFilePath);
}
var xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlStr);
You need to use Load() instead of LoadXML(). LoadXML tries to parse a string into XML, in this case your URL.
how we can create new xml file by C# in the following situation:
its winform.
our xml code is in a string str = "<><><><>...etc"
now i want to create an xml file myxml.xml which contains everything in str,
please answer in the context and thanks...
need simple source code
XmlDocument.LoadXml
using System;
using System.Xml;
public class Sample {
public static void Main() {
// Create the XmlDocument.
XmlDocument doc = new XmlDocument();
doc.LoadXml("<item><name>wrench</name></item>"); //Your string here
// Save the document to a file and auto-indent the output.
XmlTextWriter writer = new XmlTextWriter("data.xml",null);
writer.Formatting = Formatting.Indented;
doc.Save(writer);
}
}
Hi how about creating a method just for this:
private static void CreateXMLFile(string xml, string filePath)
{
// Create the XmlDocument.
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml); //Your string here
// Save the document to a file and auto-indent the output.
XmlTextWriter writer = new XmlTextWriter(filePath, null);
writer.Formatting = Formatting.Indented;
doc.Save(writer);
}
If the only thing you want to do is to save the string as a file (and you don't want to do do XML-specific stuff like checking well-formedness or automatic indenting), you can simply use File.WriteAllText().
I'm having some trouble using a combination of XElement and XslCompiledTransform. I've put the sample code I'm using below. If I get my input XML using the GetXmlDocumentXml() method, it works fine. If I use the GetXElementXml() method instead, I get an InvalidOperationException when calling the Transform method of XslComiledTransform:
Token Text in state Start would result in an invalid XML document. Make sure that the ConformanceLevel setting is set to ConformanceLevel.Fragment or ConformanceLevel.Auto if you want to write an XML fragment.
The CreateNavigator method on both XElement and XmlDocument returns an XPathNavigator. What extra stuff is XmlDocument doing so this all works, and how can I do the same with XElement? Am I just doing something insane?
static void Main(string[] args)
{
XslCompiledTransform stylesheet = GetStylesheet(); // not shown for brevity
IXPathNavigable input = this.GetXElementXml();
using (MemoryStream ms = this.TransformXml(input, stylesheet))
{
XmlReader xr = XmlReader.Create(ms);
xr.MoveToContent();
}
}
private MemoryStream TransformXml(
IXPathNavigable xml,
XslCompiledTransform stylesheet)
{
MemoryStream transformed = new MemoryStream();
XmlWriter writer = XmlWriter.Create(transformed);
stylesheet.Transform(xml, null, writer);
transformed.Position = 0;
return transformed;
}
private IXPathNavigable GetXElementXml()
{
var xml = new XElement("x", new XElement("y", "sds"));
return xml.CreateNavigator();
}
private IXPathNavigable GetXmlDocumentXml()
{
var xml = new XmlDocument();
xml.LoadXml("<x><y>sds</y></x>");
return xml.CreateNavigator();
}
Oh, that was easy. The solution was to wrap the XElement in an XDocument object. Problem solved!