How can I update my xml file (existing) data using c#

[patilrajesh81]

my file is like:

<?xml version="1.0" encoding="utf-8"?> <CarList 
    xmlns="http://tempuri.org"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://tempuri.org carSchema.xsd"
 > 
<cars car_Id="1"> 
<car_make>MARUTI</car_make> 
<car_model>WAGONR</car_model> 
<car_year>2000</car_year> 
<car_price>400000</car_price> 
<reg_num>MA123</reg_num> 
<prev_owner>SAMEER</prev_owner> 
</cars> 
<cars car_Id="2" > 
<car_make>MARUTI</car_make>
 <car_model>WAGONR</car_model> 
<car_year>2000</car_year> 
<car_price>400000</car_price> 
<reg_num>MA123</reg_num> 
<prev_owner>SAMEER</prev_owner> 
</cars>  </CarList>

How i can update my xml file(existing) data using c#

[adriancs]

Read the whole file.
load it into Dictionary, Class or whatever.
Modify as need.
Rewrite the whole file.

[leecorp]

This code can Access the XML File

Then Add some new Elements to it

Then Append the XML File

string fileName = RemoveSpecialCharacters(DateTime.Now.ToString()) + FileUpload1.FileName;
        XmlWriterSettings st = new XmlWriterSettings();
        st.Indent = true; ;

        st.OmitXmlDeclaration = true;
        st.Encoding = Encoding.ASCII;
       
        
        // to append to the existing files 
        try
        {
            XElement xml = XElement.Load(Server.MapPath(".\\XML\\data.xml"));
            xml.Add(new XElement("Software", new XAttribute("Name",TextBox1.Text) ));
            xml.Save(Server.MapPath(".\\XML\\data.xml"));

        }
        catch(Exception ex){}

Hope this Works
Good Day