C# adding an XML node to an existed XML file

Question

0.00/5 (No votes)

See more:

I want to create "User" node to this xml file:

XML

<User PIN ="5111">
    <ID>123450</ID>
    <tcounter>1</tcounter>
    <Name>Adam Lin</Name>
    <CheckingACCNum>8565478</CheckingACCNum>
    <CheckingACCBalance>4500</CheckingACCBalance>
    <SavingACCNum>741844</SavingACCNum>
    <SavingACCBalance>0</SavingACCBalance>
    <Address>1120 Virginia Ave., Nashville, TN 37210</Address>
    <Phone>(615) 963-4444</Phone>
    <current>1</current>
    <t1> </t1>
    <t2> </t2>
    <t3> </t3>
    <t4> </t4>
    <t5> </t5>
    <t6> </t6>
    <t7> </t7>
    <t8> </t8>
    <t9> </t9>
    <t10> </t10>
    <t11> </t11>
    <t12> </t12>
    <t13> </t13>
    <t14> </t14>
    <t15> </t15>
    <t16> </t16>
    <t17> </t17>
    <t18> </t18>
    <t19> </t19>
    <t20> </t20>
    </User>

What I have tried:

C#

using (XmlTextWriter write = new XmlTextWriter("USERS.xml", Encoding.UTF8))
            {
                write.WriteStartElement("User");
                write.WriteAttributeString("PIN", userPIN.Text);
                write.WriteElementString("ID",usrid.Text);
                write.WriteElementString("Name", usrname.Text);
                write.WriteElementString("CheckingACCNum", usrcheckingaccnum.Text);
                write.WriteElementString("CheckingACCBalance",      usrcheckingaccBalance.Text);
                write.WriteElementString("Name", usrname.Text);
                write.WriteElementString("SavingACCNum", usrsavingaccNum.Text);
                write.WriteElementString("SavingACCBalance", usrcsavingaccBalance.Text);
                write.WriteElementString("Address", useraddress.Text);
                write.WriteElementString("Phone", usrphone.Text);
                write.WriteElementString("tcounter", "1");
                write.WriteElementString("current", "1");
                write.WriteEndElement();
                doc11.Save("USERS.xml");

Posted 21-Mar-16 19:51pm

coding star

Updated 21-Mar-16 20:39pm

v3

Add a Solution

3 solutions

Solution 2

I think XMLDocument class will help you more than XMLWriter, it is very easy just create new node and append it to existing xml
see below sample snippet

C#

XmlDocument doc = new XmlDocument();
doc.Load("file.xml");
XmlElement foo = doc.CreateElement("foo");
XmlElement bar = doc.CreateElement("bar");
bar.InnerText = "whatever";
foo.AppendChild(bar);
doc.DocumentElement.AppendChild(foo);
doc.Save("file.xml");

Posted 21-Mar-16 20:26pm

koolprasad2003

Solution 3

Quote:
I want to create "User" node to this xml file:

The file you show is wrong afainst what you want to do.
In order to add a user to the file, I think you need a root node.
Your file

XML

<user pin="5111">
...
</user>

must look like

XML

<rootnode>
  <user pin="5111">
  ...
  </user>
</rootnode>

in order to add User nodes

XML

<rootnode>
  <user pin="5111">
  ...
  </user>
  <user pin="5112">
  ...
  </user>
</rootnode>

To change an XML file, one need to load the file in memory (with an XMLReader object/class). Add nodes as you want. Save the file when finished. Like shown in Solution 1.
XML Tutorial[^]

Posted 21-Mar-16 20:39pm

Patrice T

Updated 21-Mar-16 20:42pm

v2

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

VR Karthikeyan · Accepted Answer · 2016-03-21T20:11:00

Its very simple. Check the following code,

C#

DataSet objDataSet = new DataSet();
objDataSet.ReadXml(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\users.xml");

DataRow objNewRow = objDataSet.Tables[0].NewRow();
objNewRow["PIN"] = "012345";
objNewRow["ID"] = "98765";
objNewRow["Name"] = "Testing User";
objNewRow["CheckingACCNum"] = "258741369";
objNewRow["CheckingACCBalance"] = "50000";
objNewRow["SavingACCNum"] = "789456123";
objNewRow["SavingACCBalance"] = "45000";
objNewRow["Address"] = "United States";
objNewRow["Phone"] = "1231231230";
objNewRow["tcounter"] = "10";
objNewRow["current"] = "565";

objDataSet.Tables[0].Rows.Add(objNewRow);
objDataSet.Tables[0].AcceptChanges();

objDataSet.Tables[0].WriteXml(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\new_users.xml");

I have used your user.xml file from my desktop folder. You just provide your own xml file path in the following functions.

C#

objDataSet.ReadXml("Your XML file path");
objDataSet.Tables[0].WriteXml("Your XML file path");