Having an issue grabbing values in an XML file
The structure is as followed
<configuration>
<settings>
<add key="folder" value = "c:\...." />
</settings>
</configuration>
i want to be able to read the value from folder.
string val = string.Empty;
foreach (XElement element in XElement.Load(file).Elements("configuration"))
{
foreach (XElement element2 in element.Elements("settings"))
{
if (element2.Name.Equals("folder"))
{
val = element2.Attribute(key).Value;
break;
}
}
}
return val;
The name of the element isn't folder... that's the value of the key attribute. Also note that as you've used XElement.Load, the element is the configuration element - asking for Elements("configuration") will give you an empty collection. You could either load an XDocument instead, or just assume you're on a configuration element and look beneath it for settings.
I think you want:
return XElement.Load(file)
.Elements("settings")
.Elements("add")
.Where(x => (string) x.Attribute("key") == "folder")
.Select(x => (string) x.Attribute("value"))
.FirstOrDefault();
You can use XPath:
var folder = XElement.Load(file)
.XPathSelectElements("/settings/add[#key='folder']")
.Select(a => (string)a.Attribute("value"))
.FirstOrDefault();
Related
I have XML Code Block as below (it is part of similar lines of hundreds..):
<specs>
<spec name='fald' value = '100'>
<name></name>
<value></value>
</spec>
</specs>
I need to convert code as seen below:
<specs>
<spec name ='fald' value = '100'/>
</specs>
Using following code I am able to delete child nodes:
foreach (XElement child in doc.Descendants().Reverse())
{
if (child.HasAttributes)
{
foreach (var attribute in child.Attributes())
{
if (string.IsNullOrEmpty(attribute.Value) && string.IsNullOrEmpty(child.Value))
child.Remove();
}
}
}
But this process also deletes parent node ('spec') which is expected to take place there. Any help is appreciated, thanks...
It's a little unclear what the criteria for deleting an element is, but to get you started, perhaps this is somewhere along the lines of what you are looking for?
var xml =
#"<specs>
<spec name='fald' value='100'>
<name></name>
<value></value>
</spec>
</specs>";
var doc = XElement.Parse(xml);
var childrenToDelete = doc.XPathSelectElements("//spec/*")
.Where(elem => string.IsNullOrEmpty(elem.Value)
&& (!elem.HasAttributes
|| elem.Attributes().All(attr => string.IsNullOrEmpty(attr.Value))))
.ToList();
foreach (var child in childrenToDelete)
{
child.Remove();
}
// Produces:
// <specs>
// <spec name="fald" value="100" />
// </specs>
Check this fiddle for a test run.
I have an XML file with subelements of elements:
<Root>
<Location>
<DepartureBoundary>
<DepartureBoundaryRadius>600</DepartureBoundaryRadius>
</DepartureBoundary>
</Location>
<Location>
<DepartureBoundary>
<DepartureBoundaryRadius>600</DepartureBoundaryRadius>
</DepartureBoundary>
</Location>
</Root>
Currently, I am doing the following to access the value for DepartureBoundaryRadius:
XDocument locationsDoc = XDocument.Load("file.xml");
DepartureLocationBoundaryRadius = null;
List<DepartureBoundaryRadius> radiusList = new List<DepartureBoundaryRadius>();
foreach (XElement locationElement in locationsDoc.Descendants("Root"))
{
foreach (XElement locationSubElement in locationsDoc.Descendants("Location"))
{
foreach (XElement departureElement in locationsDoc.Descendants("DepartureBoundary"))
{
DepartureLocationBoundaryRadius = departureElement.Element("DepartureRadius").Value));
radiusList.Add(DepartureLocationBoundaryRadius);
}
}
}
Is there an easier way to do this? I would rather assign the value of DepartureLocationBoundaryRadius in one line or one statement -- especially since each Location has only one DepartureBoundaryRadius value. Any thoughts? Thanks!
I think you mean Elements in your question . Descendants already gives what you want
var values = locationsDoc.Descendants("DepartureBoundaryRadius")
.Select(x => x.Value)
.ToList();
var list = xdoc.Document.Descendants("DepartureBoundaryRadius").Select(x=>x.Value);
I am trying to figure out the code to extract xml child (I think this is worded correctly) elements. I have searched and tried many samples but cannot find how to drill down to pick out the section I want and return the information I need. Maybe I all I need is someone to define the data I am trying to pull so I can read up on the issue, of course any code would be very helpful and I will figure it out from there. Thanks in advanced for any help!
Here is the xml file. I am trying to run an if statement to find the section named <STATISTICTYPE>PVCAP_CharactersSaved</STATISTICTYPE> and return the <JOBNAME>,<TIMEDELTA>,<VALUESUM>.
<?xml version="1.0" encoding="utf-8"?>
<PVCAPTURESTATISTICCONTAINTER xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<PVCAPTUREJOBSTATISTICS>
<PVCAPTURESTATISTICSUMMARY>
<STATISTICTYPE>PVCAP_CharactersSaved</STATISTICTYPE>
<STATISTICNAME>Characters saved</STATISTICNAME>
<JOBID>24</JOBID>
<JOBNAME>HEAT FILES</JOBNAME>
<TIMEDELTA>422</TIMEDELTA>
<VALUESUM>25432</VALUESUM>
</PVCAPTURESTATISTICSUMMARY>
<PVCAPTURESTATISTICSUMMARY>
<STATISTICTYPE>PVCAP_CharactersSaved_NoMM</STATISTICTYPE>
<STATISTICNAME>Characters saved (no match and merge)</STATISTICNAME>
<JOBID>24</JOBID>
<JOBNAME>HEAT FILES</JOBNAME>
<TIMEDELTA>422</TIMEDELTA>
<VALUESUM>25432</VALUESUM>
</PVCAPTURESTATISTICSUMMARY>
</PVCAPTUREJOBSTATISTICS>
<DOCUMENTCOUNT>762</DOCUMENTCOUNT>
<PAGECOUNT>3194</PAGECOUNT>
<IMAGECOUNT>3194</IMAGECOUNT>
<VERSION>2.0</VERSION>
</PVCAPTURESTATISTICCONTAINTER>
You can use LINQ to XML, particularly the XElement class.
var element = XElement.Parse(xmlStr).Element("PVCAPTUREJOBSTATISTICS")
.Elements("PVCAPTURESTATISTICSUMMARY")
.First(c => c.Element("STATISTICTYPE").Value == "PVCAP_CharactersSaved")
var jobName = element.Element("JOBNAME").Value;
var timeDelta = element.Element("TIMEDELTA").Value;
var valueSum = element.Element("VALUESUM").Value;
You'll want to add in some error handling and whatnot here, but this should get you going in the right direction.
You can do something like this:
XElement res = XElement.Parse(xmlResult);
foreach(var elem in res.Element("PVCAPTUREJOBSTATISTICS").Elements("PVCAPTURESTATISTICSUMMARY"))
{
if (elem.Element("STATISTICTYPE").Value.Equals("PVCAP_CharactersSaved", StringComparison.Ordinal))
{
string jobName = elem.Element("JOBNAME").Value;
string timeDelta = elem.Element("TIMEDELTA").Value;
string valueSum = elem.Element("VALUESUM").Value;
}
}
You can use XDocument and LINQ-to-XML to do that quite easily, for example :
string xml = "your xml content here";
XDocument doc = XDocument.Parse(xml);
//or if you have the xml file instead :
//XDocument doc = XDocument.Load("path_to_xml_file.xml");
var result = doc.Descendants("PVCAPTURESTATISTICSUMMARY")
.Where(o => (string) o.Element("STATISTICTYPE") == "PVCAP_CharactersSaved")
.Select(o => new
{
jobname = (string) o.Element("JOBNAME"),
timedelta = (string) o.Element("TIMEDELTA"),
valuesum = (string) o.Element("VALUESUM")
});
foreach (var r in result)
{
Console.WriteLine(r);
}
I have an xml document (actually a config file) loaded into an XDocument object, that contains an element like this:
<ScheduledTasks>
<add key="RelativePath" value="..\Scheduler\Tasks"/>
<add key="SearchPauseInSeconds" value="10"/>
<add key="MatrixAccount" value="95755UE93ZEb3fRZUSZ753K9FRS3O9DaDrJxtdiiZnm"/>
<add key="MatrixPassword" value="95755UE93ZEb3fRZUSZ753K9FRS3O9DaDgKrn2e71"/>
</ScheduledTasks>
How can I best retrieve (and update) the value of RelativePath, SeachPauseInseconds etc? They aren't XElements.
TIA.
var attribute =
xDocument.Root.Elements()
.Single(element => element.Attribute("key").Value == "RelativePath")
.Attribute("value");
string oldValue = attribute.Value; // to retrieve
attribute.Value = newValue; // to update
They are attributes. Use XElement.Attribute("attributeName") to get them.
var items = (from i in scheduledTasksElement.Elements("add")
select new
{
KeyAttribute = i.Attribute("key"),
Key = (string)i.Attribute("key"),
ValueAttribute = i.Attribute("value"),
Value = (string)i.Attribute("value")
}).ToList();
As you can see, you can easily cast XAttribute to other types like you can do with XElement.
You can also update the value:
items[0].KeyAttribute.Value = "newValue";
You can, for example, create an extension method that will do it
public static void FindAndReplace(this XDocument doc, string key, string newValue)
{
var elem = doc.Descendants("add")
.FirstOrDefault(d => d.Attribute("key").Value == key);
if (elem != null)
elem.Attribute("value").Value = newValue;
}
and use it like
doc.FindAndReplace("RelativePath", "..\Tasks");
Here's my XML File:
<Applications>
<Application Name="Abc">
<Section Name="xyz">
<Template Name="hello">
...
....
</Template>
</Section>
</Application>
<Application Name="Abc1">
<Section Name="xyz1">
<Template Name="hello">
...
....
</Template>
</Section>
</Application>
What I need to do is get the Template XElement from the given structure based upon the Name attribute of Template tag. The problem is there can be multiple template tags with same attribute Name. The Distinguishing factor is Application Name attribute value and section attribute value.
Currently I'm able to get the XElement by first getting Application Element based upon it's attribute, then Section based upon it's attribute and then finally template based upon it' name.
I wanted to know if there is a way to get it in one go.
I would use the fact that you can call Elements or an existing sequence, so:
var template = doc.Descendants("Application")
.Where(x => (string) x.Attribute("Name") == applicationName)
.Elements("Section")
.Where(x => (string) x.Attribute("Name") == sectionName)
.Elements("Template")
.Where(x => (string) x.Attribute("Name") == templateName)
.FirstOrDefault();
You might even want to add an extension method somewhere:
public static IEnumerable<XElement> WithName(this IEnumerable<XElement> elements,
string name)
{
this elements.Where(x => (string) x.Attribute("Name") == name);
}
Then you can rewrite the query as:
var template = doc.Descendants("Application").WithName(applicationName)
.Elements("Section").WithName(sectionName)
.Elements("Template").WithName(templateName)
.FirstOrDefault();
... which I think you'll agree is quite readable :)
Note that the use of casting XAttribute to string instead of using the Value property means that any elements without the Name attribute are just effectively ignored rather than causing a NullReferenceException.
The following code should do the trick:
var template = doc.Descendants("Template")
.Where(x => x.Attribute("Name").Value == "hello"
&& x.Parent.Attribute("Name").Value == "xyz1"
&& x.Parent.Parent.Attribute("Name").Value == "Abc1");
Please note that this code throws exceptions if the XML doesn't conform to the specification. Specifically, there will be a NullReferenceException if any of the tags in question don't contain an attribute named "Name". Or if the Template tag doesn't have two levels of parents.
XDocument doc = XDocument.Load("Path of xml");
var selection =
doc.Descendants("Section").Select(item => item).Where(
item => item.Attribute("Name").Value.ToString().Equals("Section Name Value")).ToList();
if(null != selection)
{
var template =
selection.Descendants("Template").Select(item => item).Where(
item => item.Attribute("Name").Value.ToString().Equals("Template name value"));
}
XPath should help you. Use the Extensions.XPathSelectElement Method (XNode, String) :
XDocument xdoc = XDocument.Load("yourfile.xml");
string xPathQuery = string.Format(
"/Applications/Application[#Name='{0}']/Section[#Name='{1}']/Template[#Name='{2}']",
"MyApplication",
"MySection",
"MyTemplate"
);
XElement template = xdoc.Root.XPathSelectElement(xPathQuery);