Help with XML element editing

[Darkmatter5]

I have an applications that I'm writing that has an XML file with defined elements. I simply want to take input from textboxes and put the data into the appropriate XML elements.

How would I go about doing this?

Thanks!

[BigEd781]

Look at the System.Xml namespace (particulary, XmlTextWriter)

[Darkmatter5]

Here's the code I'm come up with.

XDocument xmlWorldFile = XDocument.Load(@strProjectsPath + "\\" + strFolderName + "\\world_file.xml");

XElement elmWorld = xmlWorldFile.Descendants("world").FirstOrDefault();
if (elmWorld != null)
{
XElement elmWorldName = elmWorld.Element("name");
elmWorldName.SetAttributeValue("VALUE", tbWorldName.Text);

XElement elmWorldGenre = elmWorld.Element("genre");
elmWorldGenre.SetAttributeValue("VALUE", cbWorldGenre.SelectedText);

XElement elmWorldDesc = elmWorld.Element("description");
elmWorldDesc.SetAttributeValue("VALUE", tbWorldDesc.Text);

elmWorldDesc.Save(@strProjectsPath + "\\" + strFolderName + "\\world_file.xml");
}

Here's the XML file being used.


<?xml version='1.0' encoding='UTF-8'?>
<!-- This document was created with Syntext Serna Free. -->
<WORLD>
<NAME><NAME/>
<GENRE><GENRE/>
<DESCRIPTION><DESCRIPTION/>
</WORLD>

Now I'm getting the following error "The 'DESCRIPTION' start tag on line 6 position 4 does not match the end tag of 'WORLD'. Line 7, position 3.

What is causing this error??

[TechGnome]

your three inner tags are wrong... they should be

<name></name>
<genere></genre>
<description></description>

OR

<name />
<genre />
<description />

but not both.

As a side note... you're creating elements, but not adding them to the world element... they need to be appended. Additionally, you're creating the value as a VALUE ATTRIBUTE... which will make it look like this:

<genre VALUE="Some value here"/>

I think what you really mean to do is set the VALUE PROPERTY of the ELEMENT

XElement elmWorldGenre = elmWorld.Element("genre");
elmWorldGenre.value = "Some value here";

Which will give you:

<genre>Some value here</genre>

-tg

[Darkmatter5]

Thanks for the update. It mostly worked.

Here's what I got:

XDocument xmlWorldFile = XDocument.Load(strProjectsPath + "\\" + strFolderName + "\\world_file.xml");

XElement elmWorld = xmlWorldFile.Descendants("world").FirstOrDefault();
if (elmWorld != null)
{
XElement elmWorldName = elmWorld.Element("name");
elmWorldName.Value = tbWorldName.Text;

XElement elmWorldGenre = elmWorld.Element("genre");
elmWorldGenre.Value = cbWorldGenre.SelectedText;

XElement elmWorldDesc = elmWorld.Element("description");
elmWorldDesc.Value = tbWorldDesc.Text;

elmWorldDesc.Save(strProjectsPath + "\\" + strFolderName + "\\world_file.xml");
}

Here's my new XML file:

<?xml version='1.0' encoding='UTF-8'?>
<!-- This document was created with Syntext Serna Free. -->
<world>
<name></name>
<genre></genre>
<description></description>
</world>

After the code is run, here's what happens to the XML file:

<?xml version="1.0" encoding="utf-8"?>
<description>asdgsag</description>

What did I do wrong?

[TechGnome]

As I siad the first time: "you're creating elements, but not adding them to the world element" ... To create an xml document in this manner, you create a root element... child nodes, and append the child nodes to the root node.

-tg

[[email protected]]

Hi it's my first post on code guru hope it would be useful.

May I suggest to you my version of solving this problem? Of course this code is ugly but it does what you want.

Thanks for the update. It mostly worked.

XDocument xmlWorldFile = XDocument.Load(strProjectsPath + "\\" + strFolderName + "\\world_file.xml");

XElement elmWorld = xmlWorldFile.Descendants("world").FirstOrDefault();


if (elmWorld != null)
{
//Loops among all existing elements inside of element "world" (in your case)
foreach(XElement elm in elmWorld.Elements())
{
if (elm.Name == "name")
{
elm.Value = tbWorldName.Text;
}
else if (elm.Name == "genre")
{
elm.Value = cbWorldGenre.SelectedText;
}
else if (elm.Name == "description")
{
elm.Value = tbWorldDesc.Text;
}
}
// In your last code post your save only last element "description", here you
// call method Save() for entire document
xmlWorldFile.Save(strProjectsPath + "\\" + strFolderName + "\\world_file.xml");
}

[Rammf]

But in that case, be aware that if you put in element "world" more than one set of "name-genre-description" last code sample will erase all set to last inputtet.

If you plan to store in xml file more than one set of name-genre-description you probably want to use some sing like this:

<world>

<firstItem>
<name></name>
<genre></genre>
<description></description>
</firstItem>

<secondItem>
<name></name>
<genre></genre>
<description></description>
</secondItem>

</world>