Add a new element to an XML file

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hi friends, I have an XML file

XML

<?xml version="1.0" encoding="utf-8" ?>
<HEDDERS>
  <HEDDER>
    <Name>AAAAA</Name>
  </HEDDER>
  <HEDDER>
    <Name>BBBBB</Name>
  </HEDDER>
  <HEDDER>
    <Name>CCCCC</Name>
  </HEDDER>
  <HEDDER>
    <Name>DDDDD</Name>
  </HEDDER>
  <HEDDER>
    <Name>EEEEE</Name>
  </HEDDER>
</HEDDERS>

I want to add a new element

XML

<HEDDER>
    <Name>FFFFFF</Name>
  </HEDDER>

after the last <HEADDER> element.
using ASP.Net C#

Posted 22-May-12 19:16pm

arun.m.mr

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Comments

VJ Reddy 23-May-12 2:10am

Thank you for accepting the solution :)

5 solutions

Solution 3

I write code like this

C#

XDocument doc;

       //Verify whether a file is exists or not
       if (!System.IO.File.Exists(file))
       {
           doc = new XDocument(new XDeclaration("1.0", "UTF-8", "yes"),
               new System.Xml.Linq.XElement("HEADDERS"));
       }
       else
       {
           doc = XDocument.Load(file);
           XElement ele = new XElement("Name", TextBox1.Text);
           doc.Root.Element("HEADDER").Add(ele);
           doc.Save(file);
       }

But this shows an error. " Object reference not set to an instance of an object."

Posted 22-May-12 20:09pm

arun.m.mr

Updated 22-May-12 20:10pm

v2

Comments

VJ Reddy 23-May-12 2:11am

Edit: pre tag for C# code added.

VJ Reddy 23-May-12 2:14am

doc.Root returns the root element i.e. HEDDERS in this case. Hence, doc.Root.Add(ele) will suffice

Solution 4

thank you Reddy. It works .. but the output is

XML

<HEDDERS>
  <HEDDER>
    <Name>AAAAA</Name>
  </HEDDER>
  <HEDDER>
    <Name>BBBBB</Name>
  </HEDDER>
  <HEDDER>
    <Name>CCCCC</Name>
  </HEDDER>
  <HEDDER>
    <Name>DDDDD</Name>
  </HEDDER>
  <HEDDER>
    <Name>EEEEE</Name>
  </HEDDER>
  <Name>XXXXXX</Name>
</HEDDERS>

see the last name tag. It comes out HEDDER ..

Posted 22-May-12 20:19pm

arun.m.mr

Solution 5

Any Ideas......?
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Posted 22-May-12 20:53pm

arun.m.mr

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Wendelius · Accepted Answer · 2012-05-22T19:23:00

Solution 1

You can use the AppendChild[^] to add a new child to HEDDERS. Please see the small example in the MSDN documentation.

Posted 22-May-12 19:23pm

Wendelius

Comments

VJ Reddy 23-May-12 1:31am

Good answer. 5!
I have seen your answer after posting my solution.

Wendelius 23-May-12 1:40am

Thanks :)

Mohamed Mitwalli 23-May-12 3:41am

5+

VJ Reddy · Accepted Answer · 2012-05-22T19:30:00

The following code can be used to add the element

C#

string xmlText = @"<?xml version=""1.0"" encoding=""utf-8"" ?>
                        <HEDDERS>
                        <HEDDER>
                            <Name>AAAAA</Name>
                        </HEDDER>
                        <HEDDER>
                            <Name>BBBBB</Name>
                        </HEDDER>
                        <HEDDER>
                            <Name>CCCCC</Name>
                        </HEDDER>
                        <HEDDER>
                            <Name>DDDDD</Name>
                        </HEDDER>
                        <HEDDER>
                            <Name>EEEEE</Name>
                        </HEDDER>
                        </HEDDERS>";
    XElement element = XElement.Parse(xmlText);

    element.Add(new XElement("HEDDER",
                                     new  XElement("Name","FFFFFF")
                                ));

//<HEDDERS>
//  <HEDDER>
//    <Name>AAAAA</Name>
//  </HEDDER>
//  <HEDDER>
//    <Name>BBBBB</Name>
//  </HEDDER>
//  <HEDDER>
//    <Name>CCCCC</Name>
//  </HEDDER>
//  <HEDDER>
//    <Name>DDDDD</Name>
//  </HEDDER>
//  <HEDDER>
//    <Name>EEEEE</Name>
//  </HEDDER>
//  <HEDDER>
//    <Name>FFFFFF</Name>
//  </HEDDER>
//</HEDDERS>

Add a new element to an XML file

5 solutions

Solution 1

Solution 2

Solution 3

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Solution 5

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