Updating XML Using Linq

[=?Utf-8?B?VGVycmFuY2U=?=]

I'm trying to update an xml file but seem to be having problems. My xml file
is in the following format:
<main>
<site name="mysite" username="user" password="pass" />
<site ... />
</main>
The code I have is:
XDocument mydoc =
XDocument.Load(this.txtFilePath.Text,LoadOptions.P reserveWhitespace);

XElement myElem = mydoc.Elements("site").Where(e =(string)
e.Attribute("name") == fieldArray[0]).FirstOrDefault();

if (myElem == null) Console.WriteLine("myElem is null");

//myElem.SetAttributeValue("name",this.txtSite.Text) ;
myElem.Attribute("name").Value = this.txtSite.Text;
//myElem.SetAttributeValue("login", this.txtUsername.Text);
myElem.Attribute("login").Value = this.txtUsername.Text;
//myElem.SetAttributeValue("password", this.txtPassword.Text);
myElem.Attribute("password").Value = this.txtPassword.Text;

It doesn't seem to be working. myElem variable seems to be null. Any
suggestions?
--
TC

[Martin Honnen]

Terrance wrote:

I'm trying to update an xml file but seem to be having problems. My xml file
is in the following format:
<main>
<site name="mysite" username="user" password="pass" />
<site ... />
</main>
The code I have is:
XDocument mydoc =
XDocument.Load(this.txtFilePath.Text,LoadOptions.P reserveWhitespace);

XElement myElem = mydoc.Elements("site").Where(e =(string)
e.Attribute("name") == fieldArray[0]).FirstOrDefault();

if (myElem == null) Console.WriteLine("myElem is null");

//myElem.SetAttributeValue("name",this.txtSite.Text) ;
myElem.Attribute("name").Value = this.txtSite.Text;
//myElem.SetAttributeValue("login", this.txtUsername.Text);
myElem.Attribute("login").Value = this.txtUsername.Text;
//myElem.SetAttributeValue("password", this.txtPassword.Text);
myElem.Attribute("password").Value = this.txtPassword.Text;

It doesn't seem to be working. myElem variable seems to be null. Any
suggestions?

The 'site' elements are descendants of the XDocument node so either use
mydoc.Descendants("site")
or access the root element first
mydoc.Root.Elements("site")

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[=?Utf-8?B?VGVycmFuY2U=?=]

Thanks a bunch. That worked.
--
TC
"Terrance" wrote:

I'm trying to update an xml file but seem to be having problems. My xml file
is in the following format:
<main>
<site name="mysite" username="user" password="pass" />
<site ... />
</main>
The code I have is:
XDocument mydoc =
XDocument.Load(this.txtFilePath.Text,LoadOptions.P reserveWhitespace);

XElement myElem = mydoc.Elements("site").Where(e =(string)
e.Attribute("name") == fieldArray[0]).FirstOrDefault();

if (myElem == null) Console.WriteLine("myElem is null");

//myElem.SetAttributeValue("name",this.txtSite.Text) ;
myElem.Attribute("name").Value = this.txtSite.Text;
//myElem.SetAttributeValue("login", this.txtUsername.Text);
myElem.Attribute("login").Value = this.txtUsername.Text;
//myElem.SetAttributeValue("password", this.txtPassword.Text);
myElem.Attribute("password").Value = this.txtPassword.Text;

It doesn't seem to be working. myElem variable seems to be null. Any
suggestions?
--
TC