Solved

Write XML Log

Posted on 2006-10-31
5
577 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

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

708 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

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now