C# how to add a new attribute in a XML config file

Question

0.00/5 (No votes)

See more:

Hello friends,
One quick question.
I need to do the following modification in a xml config file.
Need to replace the following:

<security mode="TransportCredentialOnly"><transport clientCredentialType="Windows"/>

with

<security mode="Transport">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />

How to do this. Please help.

What I have tried:

I tried googling and done something like this...
XmlAttribute formId = (XmlAttribute)xmlDoc.SelectSingleNode("//security[@mode='TransportCredentialOnly'];
if (formId != null)
{
formId.Value = "Transport"; // Set to new value.
}
xmlDoc.Save("C:\\temp\\web.config");

But not getting a clue how to add the following attributes: proxyCredentialType, clientCredentialType, algorithmSuite

Posted 8-Aug-18 2:32am

Dinesh Kumar Dora

Updated 8-Aug-18 4:56am

v2

Add a Solution

1 solution

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)

Eric Lynch · Answer 1 · 2018-08-08T04:56:00

Solution 1

Something like the following should work.

XmlNode node = doc.SelectSingleNode("//security");
XmlAttribute attr = doc.CreateAttribute("proxyCredential");
attr.Value = "attribute-value";
node.Attributes.Append(attr);

Posted 8-Aug-18 4:56am

Eric Lynch

Comments

Dinesh Kumar Dora 9-Aug-18 1:54am

Super Thanks Eric.

Dinesh Kumar Dora 9-Aug-18 5:44am

Eric, i tried your method but getting the output like this:
<security mode="Transport" proxyCredential="None" realm="">
<transport clientCredentialType="Windows" />

I want it in this way:
<security mode="Transport">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />

Please help. how can i get this.

Eric Lynch 9-Aug-18 7:46am

In your question, you didn't mention that you wanted to change the "transport" node. To change the "transport" node, you want the following:

XmlNode node = doc.SelectSingleNode("//security/transport");

You should really take the time to learn XPATH. This is the syntax for the parameter to SelectSingleNode. Then, you can answer this question for yourself. I'll leave changing the message node as a learning exercise :)

For information on XPATH syntax, see the following:

https://www.w3schools.com/xml/xpath_syntax.asp

For information on SelectSingleNode, see the following:

https://docs.microsoft.com/en-us/dotnet/api/system.xml.xmlnode.selectsinglenode

Also, if you'll be dealing with XML longer term, you may want to check out LINQ to XML. While the XmlDocument API continues to work fine, LINQ to XML offers many advantages. For more information on LINQ to XML, check out:

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/linq/basic-queries-linq-to-xml
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/linq/getting-started-linq-to-xml

With LINQ, if you're unfamiliar, you can choose between query syntax and method syntax. Query syntax is shown in many of the examples. Method syntax is more like traditional C# syntax. Any query syntax can also be expressed as method syntax. The reverse is not true.

Personally, I prefer method syntax. Either is fine, its up to you which works better for you. Basically, method syntax is a series of extensions to the IEnumerable interface. The following article summarizes the available methods:

https://www.codeproject.com/Articles/1240219/LINQ-Part-Standard-Methods-Tools-in-the-Toolbox