Solved

Write XML Log

Posted on 2006-10-31
5
583 Views
Last Modified: 2008-01-09
Hi,

I want to write a log in xml format...a simple log...just recording date and time and some context...
This is what I do...

WriteLog("Start Program...");
WriteLog("Testing 1...");
WriteLog("Testing 2...");

public void WriteLog(string logstr)
{
            XmlTextWriter   xmlWriter = new XmlTextWriter("HttpListenerLog.xml", System.Text.Encoding.UTF8);
            DateTime        dt = DateTime.Now;

            xmlWriter.Formatting = Formatting.Indented;
            xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
            xmlWriter.WriteStartElement("MSG");
            xmlWriter.WriteAttributeString("Time", dt.ToString());
            xmlWriter.WriteAttributeString("Msg", logstr);
           
            xmlWriter.Close();
}

Here is what I wanna see...
<?xml version='1.0' encoding='UTF-8'?>
<MSG>
<INFO Time="2006/11/1 AM 11:08:48" Msg="Start Program..." />
<INFO Time="2006/11/1 AM 11:08:50" Msg="Testing 1..."/>
</MSG>

Something like this.  How can I modify my code to do this?
0
Comment
Question by:xenia27
  • 3
  • 2
5 Comments
 
LVL 2

Expert Comment

by:NewMom2Brandon
ID: 17862134
public void WriteLog(string logstr)
{
        DateTime        dt = DateTime.Now;

        XmlTextWriter   xmlWriter = new XmlTextWriter("HttpListenerLog.xml", System.Text.Encoding.UTF8);
       
         //This is the start of the document      
            xmlWriter.Formatting = Formatting.Indented;
            xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");

            xmlWriter.WriteStartElement("MSG");
            xmlWriter.WriteStartElement("INFO");
            xmlWriter.WriteAttributeString("Time", dt.ToString());
            xmlWriter.WriteAttributeString("Msg", logstr);
            xmlWriter.WriteEndElement();
            xmlWriter.WriteEndElement();

         //this is the end of the document
         xmlWriter.WriteEndDocument();              
         xmlWriter.Flush();
         xmlWriter.Close();

}
0
 
LVL 2

Expert Comment

by:NewMom2Brandon
ID: 17862304

you will need to do a foreach inside your function to get all of the INFO fields.

public void WriteLog(string logstr)
{
        DateTime        dt = DateTime.Now;

        XmlTextWriter   xmlWriter = new XmlTextWriter("HttpListenerLog.xml", System.Text.Encoding.UTF8);
       
         //This is the start of the document      
            xmlWriter.Formatting = Formatting.Indented;
            xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");

            xmlWriter.WriteStartElement("MSG");
****Do a foreach here
            xmlWriter.WriteStartElement("INFO");
            xmlWriter.WriteAttributeString("Time", dt.ToString());
            xmlWriter.WriteAttributeString("Msg", logstr);
            xmlWriter.WriteEndElement();
*** end foreach
            xmlWriter.WriteEndElement();

         //this is the end of the document
         xmlWriter.WriteEndDocument();              
         xmlWriter.Flush();
         xmlWriter.Close();

}
0
 

Author Comment

by:xenia27
ID: 17863618
If I have something existed in HttpListenerLog.xml file and I would like to keep it in my file and add new context, how can I do so?
Thanks for your help~
0
 
LVL 2

Accepted Solution

by:
NewMom2Brandon earned 500 total points
ID: 17866597
You can do several different things you can so

1. you can move all of your data into a hashtable, then add what you need then have it write back out.

2. You can add your data into a dataset. then add to the dataset and then write it backout

3. http://www.c-sharpcorner.com/xml/InsertDatatoXMLDocument.asp

4. You can use XPath

5. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconinsertingnodesintoxmldocument.asp

6.

XmlDocument doc = new XmlDocument();
FileStream myFile = new FileStream(@"C:\blabla.xml", FileMode.Open);
doc.Load(myFile);
XmlNode root = doc.FirstChild;
//create new node
XmlElement elem = doc.CreateElement("INFO");
elem.InnerText = "this is my text to add";
//add node to the document
root.InsertAfter(elem, root.FirstChild);
0
 

Author Comment

by:xenia27
ID: 17878470
Thanks for your help~ ^^
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question