Develop Reference

Unsure of how to use LINQ to access this particular element

* I'm completely new to this, and this is a personal project I am doing. *
So I have an XML document structured like this
<Licensing key="20325">
<Organization Org="500">
<Constraints>
<MaximumOrgsInSecurity>2</MaximumOrgsInSecurity>
<MaximumUsersInSecurity>999</MaximumUsersInSecurity>
<MaximumLoggedInUsers>999</MaximumLoggedInUsers>
<MaximumLenders>1</MaximumLenders>
<OptOutofPasswordPolicy>FALSE</OptOutofPasswordPolicy>
</Constraints>
<Modules>
<Module registered="true" name="DV" id="1" />
<Module registered="true" name="DP" id="2" />
<Module registered="true" name="DCC" id="3" />
<Module registered="false" name="DRE" id="4" />
</Modules>
</Organization>
</Licensing>
and I am trying to read it using LINQ in my C# code, and although I am attempting to following this tutorial on LINQ (http://www.dotnetcurry.com/linq/564/linq-to-xml-tutorials-examples), I just can't seem to access the elements I would like. For example, how would I use LINQ to get the key number of 20325, Org number of 500, id/name/registered of each module, and stuff like that? The XML document has to be in this format. Any help or walkthroughs would be appreciated, thank you!
EDIT:
For example, I've tried doing
IEnumerable<XElement> Licensing = xelement.Elements();
foreach (var Organization in Licensing)
{
System.Diagnostics.Debug.Write(Organization.Element("Constraints").Value);
}
to see what this would give me, and it gives 29999991FALSE, when I was hoping it would give something along the lines of
MaximumOrgsInSecurity
MaximumUsersInSecurity
MaximumLoggedInUsers
MaximumLenders
OptOutofPasswordPolicy
or at least
2
999
999
1
False
I've also tried doing
IEnumerable<XElement> Licensing = xelement.Elements();
foreach (var Organization in Licensing)
{
System.Diagnostics.Debug.Write(Organization.Element("Modules").Value);
}
to see what this would give, and it gives absolutely nothing.
If there is a better way than LINQ to do this, then I am all ears. The only reason I am saying LINQ is because based on what I've found so far, LINQ would be my best bet to achieve what I am attempting to do.

Those key values are called Attributes and here's a few different ways to access them:
Debug.WriteLine(xelement.Attribute("key").Value);
Debug.WriteLine(xelement.Element("Organization").Attribute("Org").Value);
Debug.WriteLine(((XElement)xelement.FirstNode).Attribute("Org").Value);
For the constraints you're selecting a level to high, need to select the child nodes with .Elements():
foreach (var constraint in xelement.Descendants("Constraints").Elements())
{
Debug.WriteLine(constraint.Name + ": " + constraint.Value);
}
foreach (var constraint in xelement.Element("Organization").Element("Constraints").Elements())
{
Debug.WriteLine(constraint.Name + ": " + constraint.Value);
}
You can also add using System.Diagnostics; to the top of the file so you don't need to add it before every Debug too.

So based on what #mattmanser said, and further looking into LINQ and Xelement/Xdocument, I figured out how to do what I'm looking to do.
For example, say I want to know all of the "registered" booleans within the modules element and store them in an array of booleans, Id do this:
string Name = FileUpload1.FileName;
bool[] ModuleBools = new bool[4];
for (int moduleID = 1; moduleID < 5; moduleID++)
{
var quotes = XDocument.Load("C:/Users/.../Created XMLs/" + Name)
.Descendants("Module")
.Where(x => (string)x.Attribute("id") == moduleID.ToString())
.Select(x => (string)x.Attribute("registered"))
.ToList();
ModuleBools[moduleID-1] = bool.Parse(quotes.First());
}

Excuse the VB. With the given example, here is how you would access each item. The variable names, though the same as the elements, are just names.
Dim someXE As XElement
' someXE = XElement.Load("path here") 'to load from file / uri
' for testing we can do this
someXE = <Licensing key="20325">
<Organization Org="500">
<Constraints>
<MaximumOrgsInSecurity>2</MaximumOrgsInSecurity>
<MaximumUsersInSecurity>999</MaximumUsersInSecurity>
<MaximumLoggedInUsers>999</MaximumLoggedInUsers>
<MaximumLenders>1</MaximumLenders>
<OptOutofPasswordPolicy>FALSE</OptOutofPasswordPolicy>
</Constraints>
<Modules>
<Module registered="true" name="DV" id="1"/>
<Module registered="true" name="DP" id="2"/>
<Module registered="true" name="DCC" id="3"/>
<Module registered="false" name="DRE" id="4"/>
</Modules>
</Organization>
</Licensing>
Dim key As String = someXE.#key
Dim MaximumOrgsInSecurity As String = someXE.<Organization>.<Constraints>.<MaximumOrgsInSecurity>.Value
Dim MaximumUsersInSecurity As String = someXE.<Organization>.<Constraints>.<MaximumOrgsInSecurity>.Value
Dim MaximumLoggedInUsers As String = someXE.<Organization>.<Constraints>.<MaximumLoggedInUsers>.Value
Dim MaximumLenders As String = someXE.<Organization>.<Constraints>.<MaximumLenders>.Value
Dim OptOutofPasswordPolicy As String = someXE.<Organization>.<Constraints>.<OptOutofPasswordPolicy>.Value

How to load SharePoint lists from anywhere in site collection via TemplateID with CSOM?

Background:
I am trying to create a C# command line utility to extract list item information from lists that may exist anywhere within a particular site collection. All lists that I am trying to extract from were created from a particular template with ID 10003 (Custom template).
The powers that be are still deciding how frequently this thing is supposed to be run, but I'm expecting an answer on the order of every few minutes or so, so I need execution time to be no more than a minute, and don't think that's achievable with my current approach.
I have a site collection with 7 immediate children and ~200 total descendant sub-sites, and these lists may appear in any one of them. Most instances will only have a couple of items, but some of them will have a few thousand. I'm expecting ~10-20k results total.
This utility will be run on a remote server, and internally we'd prefer to use the CSOM over rest. I'm familiar with SP web part development but this is the first time I've needed to use the CSOM.
The Farm is a SP 2010 On Prem with 3 WFEs, updated with latest CU.
Immediate Issues:
I'm throwing a "Cannot complete this action." on a call to context.ExecuteQuery(), and I'm not sure why.
I am aware that I'm probably over-calling context.ExecuteQuery(), and would like to know a better way to load all of these lists.
My current code only gets the immediate child webs, when I need all descendants of the root.
Code:
My current attempt looks like this:
using (var ctxt = new ClientContext(url))
{
var webs = ctxt.Web.Webs;
ctxt.Load(webs);
ctxt.ExecuteQuery();
var allItems = new List<ListItem>();
foreach (var web in webs)
{
ctxt.Load(web.Lists);
ctxt.ExecuteQuery();
foreach (var list in web.Lists)
{
if (list.BaseTemplate == 10003)
{
ctxt.Load(list);
ctxt.ExecuteQuery();
var items = list.GetItems(query);
ctxt.Load(items);
ctxt.ExecuteQuery(); // <- **throws "Cannot complete this action." on first iteration of loop.**
allItems.AddRange(items);
}
}
}
results = allItems.Select(ConvertToNeededResultType).ToList();
}
The Query looks like:
<View Scope='RecursiveAll'>
<Webs Scope='SiteCollection' /> <!--**If I omit this line, I get a CollectionNotInitialized exception on allitems.AddRange(items)**--/>
<Lists ServerTemplate='10003' />
<Query>
<OrderBy>
<FieldRef Name='CreatedOn' Ascending='False' />
</OrderBy>
<Where>
<And>
<Eq>
<FieldRef Name='FSObjType' />
<Value Type='Integer'>0</Value>
</Eq>
<Geq>
<FieldRef Name='CreatedOn'/>
<Value Type='DateTime' IncludeTimeValue='FALSE'>{0}</Value>
</Geq>
</And>
</Where>
<Query>
<ViewFields>
<FieldRef Name='Title' Nullable='TRUE' />
<FieldRef Name='URL' Nullable='TRUE' />
<FieldRef Name='CreatedOn' Nullable='TRUE' />
<FieldRef Name='Category' Nullable='TRUE' />
<FieldRef Name='Attachments' Nullable='TRUE' />
<FieldRef Name='ID' />
<ProjectProperty Name='Title' />
<ListProperty Name='Title' />
</ViewFields>
</View>
where the {0} contains a date that is the number of days I want to go back with the list in format: "yyyy-MM-ddTHH:mm:ssZ"
What I am looking for:
I am looking for either advice on how to resolve the specific issues enumerated above with my current code, or a suggestion with examples of how to more efficiently achieve the same result.

I never did figure out the "Cannot complete this action" bit, but I've solved the requirements another way: I needed two methods, recursive for crawling the webs and retrieving items:
public static IEnumerable<WebLocation> GetWebLocations(string rootWebUrl)
{
List<WebLocation> results;
using (var cntxt = new ClientContext(rootWebUrl))
{
var web = cntxt.Web;
cntxt.Load(web, w => w.Webs, w => w.Id, w => w.ServerRelativeUrl, w => w.Lists);
cntxt.ExecuteQuery();
results = GetWebLocations(cntxt, web, Guid.Empty);
}
return results;
}
private static List<WebLocation> GetWebLocations(ClientContext cntxt, Web currentWeb, Guid parentId)
{
var results = new List<WebLocation>();
var currentId = currentWeb.Id;
var url = currentWeb.ServerRelativeUrl;
var location = new WebLocation { ParentSiteID = parentId, SiteID = currentId, WebUrl = url, HotLinksItems = new List<HotLinksItem>() };
foreach (var list in currentWeb.Lists)
{
cntxt.Load(list, l => l.BaseTemplate, l => l.RootFolder.ServerRelativeUrl);
cntxt.ExecuteQuery();
if (list.BaseTemplate == 10003)
{
var itemCollection =
list.GetItems(new CamlQuery
{
ViewXml = "<View Scope='RecursiveAll'><ViewFields><FieldRef Name='Title' Nullable='TRUE' /><FieldRef Name='ID' /><ProjectProperty Name='Title' /><ListProperty Name='Title' /></ViewFields></View>"
});
cntxt.Load(itemCollection);
cntxt.ExecuteQuery();
foreach (var item in itemCollection)
{
var hotlink = new HotLinksItem
{
Title = item["Title"] != null ? item["Title"].ToString() : null,
ID = item["ID"] != null ? item["ID"].ToString() : null,
};
location.HotLinksItems.Add(hotlink);
}
}
}
}
It still feels like I'm doing too many calls, but trimming them down with the sub selections has helped performance a lot, All in all, against my farm this thing runs in a little over 30 seconds. (Before trimming down return items, it ran in about 3 minutes.)

How to find specific value of the node in xml file

I am making windows phone 8 app based the webservices. This is my xml code:
- <response>
<timestamp>2013-10-31T08:30:56Z</timestamp>
<resultsOffset>0</resultsOffset>
<status>success</status>
<resultsLimit>8</resultsLimit>
<resultsCount>38</resultsCount>
- <headlines>
- <headlinesItem>
<headline>City edge past Toon</headline>
<keywords />
<lastModified>2013-10-30T23:45:22Z</lastModified>
<audio />
<premium>false</premium>
+ <links>
- <api>
- <news>
<href>http://api.espn.com/v1/sports/news/1600444?region=GB</href>
</news>
</api>
- <web>
<href>http://espnfc.com/uk/en/report/381799/city-edge-toon?ex_cid=espnapi_public</href>
</web>
- <mobile>
<href>http://m.espn.go.com/soccer/gamecast?gameId=381799&lang=EN&ex_cid=espnapi_public</href>
</mobile>
</links>
<type>snReport</type>
<related />
<id>1600444</id>
<story>Alvardo Negredo and Edin Dzeko struck in extra-time to book Manchester City's place in the last eight of the Capital One Cup, while Costel Pantilimon kept a clean sheet in the 2-0 win to keep the pressure on Joe Hart. </story>
<linkText>Newcastle 0-2 Man City</linkText>
- <images>
- <imagesItem>
<height>360</height>
<alt>Man City celebrate after Edin Dzeko scored their second extra-time goal at Newcastle.</alt>
<width>640</width>
<name>Man City celeb Edin Dzeko goal v nufc 20131030 [640x360]</name>
<caption>Man City celebrate after Edin Dzeko scored their second extra-time goal at Newcastle.</caption>
<type>inline</type>
<url>http://espnfc.com/design05/images/2013/1030/mancitycelebedindzekogoalvnufc20131030_640x360.jpg</url>
</imagesItem>
</images>
Code behind:
myData = XDocument.Parse(e.Result, LoadOptions.None);
var data = myData.Descendants("headlines").FirstOrDefault();
var data1 = from query in myData.Descendants("headlinesItem")
select new UpdataNews
{
News = (string)query.Element("headline").Value,
Desc = (string)query.Element("description"),
Newsurl = (string)query.Element("links").Element("mobile").Element("href"),
Imageurl = (string)query.Element("images").Element("imagesItem").Element("url").Value,
};
lstShow.ItemsSource = data1;
I am trying to get value from xml tags and assign them to News,Desc, etc. Everything works fine except Imageurl, it shows NullException. I tried same method for Imageurl, I don't know what's going wrong.

You arelooking for:
Imageurl=(string)query.Element("images").Element("imagesItem").Element("url").Value
but "imagesItem" is not a child element to "images", it's a sibling.
Edited
Ok, it is probably because the <"url"> element is missing from one of the paths. So, take that into account.
Imageurl=query.Element("images").Element("imagesItem").Element("url") != null ? Imageurl=(string)query.Element("images").Element("imagesItem").Element("url").Value : "no image",

Unknown XML error

I'm trying to read in some XML data but I'm getting an error I've never spotted before. Can anyone shed some light on this?
The error:
Screen name: System.Xml.Linq.Extensions+c__Iterator5
UnityEngine.Debug:Log(Object)
HV_ReadSettingsFile:Update() (at Assets/_scripts/HV_ReadSettingsFile.cs:64)
Here is my code reading in the XML and is ultimately generating the error:
var xdoc = XDocument.Load(#"C:\\Test.xml");
var screen = xdoc.Descendants("Screen");
foreach (var Screen in screen)
{
HV_Screen _screen = new HV_Screen();
_screen.Name = Convert.ToString(Screen.Descendants("Name").Attributes("Name"));
Debug.Log("Screen name: " + _screen.Name);
}
And my XML sheet:
<Settings>
<Display_Settings>
<Screen>
<Name Name="Screen" />
<ScreenTag Tag="Screen Tag" />
<LocalPosition X="12" Y="81" Z="28" />
<Width Width="54" />
<Height Height="912" />
</Screen>
<Screen>
<Name Name="Screen" />
<ScreenTag Tag="Screen Tag" />
<LocalPosition X="32" Y="21" Z="28" />
<Width Width="54" />
<Height Height="912" />
</Screen>
</Display_Settings>
</Settings>

That's not an error. That's logging exactly what you've asked for. You've asked for all the Name attributes in all the Name elements... but then you're trying to log that sequence as a single value.
I think you want:
var screens = xdoc.Descendants("Screen");
foreach (var screen in screens)
{
HV_Screen _screen = new HV_Screen();
_screen.Name = (string) screen.Element("Name").Attribute("Name");
Debug.Log("Screen name: " + _screen.Name);
}
This is now looking for one element and one attribute per Screen element. Note that I've changed the variable names to follow normal .NET conventions, other than _screen as I don't know what HV_Screen is meant to be.
It's not really clear why you've got separate elements for Width, Height and Name, each with an attribute matching the element name - and ScreenTag nearly doing so. If the XML is under your control, you might consider either:
<Screen Name="Screen" Width="54" Height="912" Tag="Screen Tag">
<LocalPosition X="12" Y="81" Z="28" />
</Screen>
or perhaps:
<Screen>
<Name>Screen</Name>
<ScreenTag>Screen Tag</ScreenTag>
<LocalPosition X="12" Y="81" Z="28" />
<Width>54</Width>
<Height>912</Height>
</Screen>
Also, if you're trying to build a collection of HV_Screen items, you probably want to use a query rather than a foreach loop - but it's not clear what you're actually trying to do beyond logging debug information at the moment.

You can try to do:
var xdoc = XDocument.Load(#"C:\\test.xml");
List<string> lstScreen = xdoc.Descendants("Screen").Select(x => x.Element("Name").Attribute("Name").Value).ToList();
foreach (string name in lstScreen)
{
...
I hope help you!!

How can I merge XML files?

I have two xml files that both have the same schema and I would like to merge into a single xml file. Is there an easy way to do this?
For example,
<Root>
<LeafA>
<Item1 />
<Item2 />
</LeafA>
<LeafB>
<Item1 />
<Item2 />
</LeafB>
</Root>
+
<Root>
<LeafA>
<Item3 />
<Item4 />
</LeafA>
<LeafB>
<Item3 />
<Item4 />
</LeafB>
</Root>
= new file containing
<Root>
<LeafA>
<Item1 />
<Item2 />
<Item3 />
<Item4 />
</LeafA>
<LeafB>
<Item1 />
<Item2 />
<Item3 />
<Item4 />
</LeafB>
</Root>

"Automatic XML merge" sounds like a relatively simple requirement, but when you go into all the details, it gets complex pretty fast. Merge with c# or XSLT will be much easier for more specific task, like in the answer for EF model. Using tools to assist with a manual merge can also be an option (see this SO question).
For the reference (and to give an idea about complexity) here's an open-source example from Java world: XML merging made easy
Back to the original question. There are few big gray-ish areas in task specification: when 2 elements should be considered equivalent (have same name, matching selected or all attributes, or also have same position in the parent element); how to handle situation when original or merged XML have multiple equivalent elements etc.
The code below is assuming that
we only care about elements at the moment
elements are equivalent if element names, attribute names, and attribute values match
an element doesn't have multiple attributes with the same name
all equivalent elements from merged document will be combined with the first equivalent element in the source XML document.
.
// determine which elements we consider the same
//
private static bool AreEquivalent(XElement a, XElement b)
{
if(a.Name != b.Name) return false;
if(!a.HasAttributes && !b.HasAttributes) return true;
if(!a.HasAttributes || !b.HasAttributes) return false;
if(a.Attributes().Count() != b.Attributes().Count()) return false;
return a.Attributes().All(attA => b.Attributes(attA.Name)
.Count(attB => attB.Value == attA.Value) != 0);
}
// Merge "merged" document B into "source" A
//
private static void MergeElements(XElement parentA, XElement parentB)
{
// merge per-element content from parentB into parentA
//
foreach (XElement childB in parentB.DescendantNodes())
{
// merge childB with first equivalent childA
// equivalent childB1, childB2,.. will be combined
//
bool isMatchFound = false;
foreach (XElement childA in parentA.Descendants())
{
if (AreEquivalent(childA, childB))
{
MergeElements(childA, childB);
isMatchFound = true;
break;
}
}
// if there is no equivalent childA, add childB into parentA
//
if (!isMatchFound) parentA.Add(childB);
}
}
It will produce desired result with the original XML snippets, but if input XMLs are more complex and have duplicate elements, the result will be more... interesting:
public static void Test()
{
var a = XDocument.Parse(#"
<Root>
<LeafA>
<Item1 />
<Item2 />
<SubLeaf><X/></SubLeaf>
</LeafA>
<LeafB>
<Item1 />
<Item2 />
</LeafB>
</Root>");
var b = XDocument.Parse(#"
<Root>
<LeafB>
<Item5 />
<Item1 />
<Item6 />
</LeafB>
<LeafA Name=""X"">
<Item3 />
</LeafA>
<LeafA>
<Item3 />
</LeafA>
<LeafA>
<SubLeaf><Y/></SubLeaf>
</LeafA>
</Root>");
MergeElements(a.Root, b.Root);
Console.WriteLine("Merged document:\n{0}", a.Root);
}
Here's merged document showing how equivalent elements from document B were combined together:
<Root>
<LeafA>
<Item1 />
<Item2 />
<SubLeaf>
<X />
<Y />
</SubLeaf>
<Item3 />
</LeafA>
<LeafB>
<Item1 />
<Item2 />
<Item5 />
<Item6 />
</LeafB>
<LeafA Name="X">
<Item3 />
</LeafA>
</Root>

If the format is always exactly like this there is nothing wrong with this method:
Remove the last two lines from the first file and append the second files while removing the first two lines.
Have a look at the Linux commands head and tail which can delete the first and last two lines.

It's a simple XSLT transformation something like this (which you apply to document a.xml):
<xsl:variable name="docB" select="document('b.xml')"/>
<xsl:template match="Root">
<Root><xsl:apply-templates/></Root>
</xsl:template>
<xsl:template match="Root/LeafA">
<xsl:copy-of select="*"/>
<xsl:copy-of select="$docB/Root/LeafA/*"/>
</xsl:template>
<xsl:template match="Root/LeafB">
<xsl:copy-of select="*"/>
<xsl:copy-of select="$docB/Root/LeafB/*"/>
</xsl:template>

vimdiff file_a file_b as just one example
BeyondCompare is a favorite when I'm on windows http://www.scootersoftware.com/

I ended up using C# and created myself a script. I knew I could do it when I asked the question, but I wanted to know if there was a faster way to do this since I've never really worked with XML.
The script went along the lines of this:
var a = new XmlDocument();
a.Load(PathToFile1);
var b = new XmlDocument();
b.Load(PathToFile2);
MergeNodes(
a.SelectSingleNode(nodePath),
b.SelectSingleNode(nodePath).ChildNodes,
a);
a.Save(PathToFile1);
And MergeNodes() looked something like this:
private void MergeNodes(XmlNode parentNodeA, XmlNodeList childNodesB, XmlDocument parentA)
{
foreach (XmlNode oNode in childNodesB)
{
// Exclude container node
if (oNode.Name == "#comment") continue;
bool isFound = false;
string name = oNode.Attributes["Name"].Value;
foreach (XmlNode child in parentNodeA.ChildNodes)
{
if (child.Name == "#comment") continue;
// If node already exists and is unchanged, exit loop
if (child.OuterXml== oNode.OuterXml&& child.InnerXml == oNode.InnerXml)
{
isFound = true;
Console.WriteLine("Found::NoChanges::" + oNode.Name + "::" + name);
break;
}
// If node already exists but has been changed, replace it
if (child.Attributes["Name"].Value == name)
{
isFound = true;
Console.WriteLine("Found::Replaced::" + oNode.Name + "::" + name);
parentNodeA.ReplaceChild(parentA.ImportNode(oNode, true), child);
}
}
// If node does not exist, add it
if (!isFound)
{
Console.WriteLine("NotFound::Adding::" + oNode.Name + "::" + name);
parentNodeA.AppendChild(parentA.ImportNode(oNode, true));
}
}
}
Its not perfect - I have to manually specify the nodes I want merged, but it was quick and easy for me to put together and since I have almost no knowledge of XML, I'm happy :)
It actually works out better that it only merges the specified nodes since I'm using it to merge Entity Framework's edmx files, and I only really want to merge the SSDL, CDSL, and MSL nodes.

The way you could do it, is load a dataset with the xml and merge the datasets.
Dim dsFirst As New DataSet()
Dim dsMerge As New DataSet()
' Create new FileStream with which to read the schema.
Dim fsReadXmlFirst As New System.IO.FileStream(myXMLfileFirst, System.IO.FileMode.Open)
Dim fsReadXmlMerge As New System.IO.FileStream(myXMLfileMerge, System.IO.FileMode.Open)
Try
dsFirst.ReadXml(fsReadXmlFirst)
dsMerge.ReadXml(fsReadXmlMerge)
Dim str As String = "Merge Table(0) Row Count = " & dsMerge.Tables(0).Rows.Count
str = str & Chr(13) & "Merge Table(1) Row Count = " & dsMerge.Tables(1).Rows.Count
str = str & Chr(13) & "Merge Table(2) Row Count = " & dsMerge.Tables(2).Rows.Count
MsgBox(str)
dsMerge.Merge(dsFirst, True)
DataGridParent.DataSource = dsMerge
DataGridParent.DataMember = "rulefile"
DataGridChild.DataSource = dsMerge
DataGridChild.DataMember = "rule"
str = ""
str = "Merge Table(0) Row Count = " & dsMerge.Tables(0).Rows.Count
str = str & Chr(13) & "Merge Table(1) Row Count = " & dsMerge.Tables(1).Rows.Count
str = str & Chr(13) & "Merge Table(2) Row Count = " & dsMerge.Tables(2).Rows.Count
MsgBox(str)

reposting answer from https://www.perlmonks.org/?node_id=127848
Paste following into a perl script
use strict;
require 5.000;
use Data::Dumper;
use XML::Simple;
use Hash::Merge;
my $xmlFile1 = shift || die "XmlFile1\n";
my $xmlFile2 = shift || die "XmlFile2\n";
my %config1 = %{XMLin ($xmlFile1)};
my %config2 = %{XMLin ($xmlFile2)};
my $merger = Hash::Merge->new ('RIGHT_PRECEDENT');
my %newhash = %{ $merger->merge (\%config1, \%config2) };
# XMLout (\%newhash, outputfile => "newfile", xmldecl => 1, rootname => 'config');
print XMLout (\%newhash);