Editing XML lines using C#

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I’m still getting into the whole automation stuff and there are still areas that I am unfamiliar with – Today it turns out to be XML editing.
I haven’t worked much with XML files so I’m struggling slightly with what I’m trying to do.

I need to edit the 3 versions lines in the XML file, incrementing the version number of "PhoneVersion", "TabletVersion" & "DesktopVersion" by 1.

See XML below

<configuration>
  <appSettings>
    <add key="PhoneVersion" value="36.999.1" />
    <add key="TabletVersion" value="36.999.1" />
    <add key="DesktopVersion" value="36.999.1" />
    <add key="ToolsEnabledKey" value="tokolosheQA" />
    <add key="ToolsURL" value="" />
    <add key="DbCommandTimeOut" value="60" />
  </appSettings>
</configuration>

I haven’t had much luck actually reading or accessing the individual elements/attributes.

What I have tried:

This is what i have tried

XDocument doc = XDocument.Load(webconfig);

foreach (XElement add in doc.Descendants("add"))
 {
    string[] values = add.Attribute("value").Value.Split(new char[] { '.' });
    values[values.Length - 1] = (int.Parse(values[values.Length - 1]) + 1).ToString();
    add.SetAttributeValue("value", string.Join(".", values));
 }

Posted 13-Jul-18 0:24am

Member 11546646

Updated 13-Jul-18 6:40am

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Leo Chapiro · Answer 1 · 2018-07-13T01:57:00

Solution 1

Try this, assuming your XML is in _strXml:

C#

using System.Xml;


XmlDocument oDom = new XmlDocument();
oDom.LoadXml(_strXml);

XmlNode oXmlNode = oDom.FirstChild; // node "configurartion"
oXmlNode = oXmlNode.FirstChild;     // node "appSettings"

foreach (XmlNode oNode in oXmlNode.ChildNodes)
{
    if (oNode.Attributes["key"].Value == "PhoneVersion")
        oNode.Attributes["value"].Value = "whatever";
    // ... and so long ...
}

Posted 13-Jul-18 1:57am

Leo Chapiro

Updated 13-Jul-18 1:59am

v3

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Member 11546646 13-Jul-18 8:22am

So this makes perfect sense! However i keep getting an error

"CMLException was unhandled - Data at the root level is invalid. Line 1, position 1."

string webconfig = BuildLocation + "\\Web.config";

XmlDocument oDom = new XmlDocument();
oDom.LoadXml(webconfig);

XmlNode oXmlNode = oDom.FirstChild;
oXmlNode = oXmlNode.FirstChild;

foreach (XmlNode oNode in oXmlNode.ChildNodes)
{
if (oNode.Attributes["key"].Value == "PhoneVersion")
oNode.Attributes["value"].Value = "36.999.0.01";

}

Maciej Los · Answer 2 · 2018-07-13T02:17:00

Xml file does not contain lines! Xml[^] content is a set of nodes!

Try this:

C#

XDocument xdoc = XDocument.Load(webconfig);
var nodes = xdoc.Descendants("add")
	.Select(x=> new
	{
		NodeName = x.Name,
		Key = (string)x.Attribute("key").Value,
		Value = (string)x.Attribute("value").Value
	})
	.ToList();

Result:

NodeName  Key               Value
add       PhoneVersion      36.999.1 
add       TabletVersion     36.999.1 
add       DesktopVersion    36.999.1 
add       ToolsEnabledKey   tokolosheQA 
add       ToolsURL   
add       DbCommandTimeOut  60

to select single node:

C#

XElement singlenode = xdoc.Descendants("add")
	.Where(x=> (string)x.Attribute("key").Value == "DesktopVersion")
	.SingleOrDefault();

singlenode.Attribute("value").Value = "Bla bla bla";

//save changes
xdoc.Save(webconfig)

For further details about manipulating xml content, please see: XDocument Class (System.Xml.Linq)[^]

Member 11546646 · Answer 3 · 2018-07-13T03:34:00

SO AFTER TINKERING WITH SOME IDEAS YOU GAVE ME - THIS WORKED GUY!!

string newValue = string.Empty;
     XmlDocument xmlDoc = new XmlDocument();

     xmlDoc.Load(webconfig);

     XmlNode PhoneVersionNode =
     xmlDoc.SelectSingleNode("configuration/appSettings/add[@key='PhoneVersion']");
     PhoneVersionNode.Attributes[1].Value = "newValue";


     xmlDoc.Save(webconfig);

THANKS FOR THE HELP

Gerry Schmitz · Answer 4 · 2018-07-13T06:41:00

Solution 4

Use the "configuration manager" to manage "configuration settings":

ConfigurationManager.AppSettings Property (System.Configuration)[^]

Posted 13-Jul-18 6:41am

Gerry Schmitz

Editing XML lines using C#

4 solutions

Solution 1

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