Is there an equivalent XmlDocument node locator for Elements in XDocument?
private const string InvalidDateTest =
"[text() = \"0000-00-00\" or text() = \" - - \" or text() = \"- - \"]";
xmlDocument.SelectNodes("//DeterminedDate/Value" + InvalidDateTest);
sauced it out myself:
using System.Xml.XPath;
xDocument.XPathSelectElements("//DeterminedDate/Value" + InvalidDateTest);
XDocument + Xpath sample :
using(var stream = new StringReader(xml))
{
XDocument xmlFile = XDocument.Load(stream);
var query = (IEnumerable) xmlFile.XPathEvaluate("/REETA/AFFIDAVIT/COUNTY_NAME");
foreach(var band in query.Cast < XElement > ())
{
Console.WriteLine(band.Value);
}
xmlFile.Save("books.xml");
}
To discriminate the nodes you need to simply chain extensions to the descendant call which will filter out what is needed:
string Data = #"<?xml version=""1.0""?>
<Notifications>
<Alerts>
<Alert>1</Alert>
<Alert>2</Alert>
<Alert>3</Alert>
</Alerts>
</Notifications>";
XDocument.Parse(Data)
.Descendants("Alert")
.Where (node => int.Parse(node.Value) > 1 && int.Parse(node.Value) < 3)
.ToList()
.ForEach(al => Console.WriteLine ( al.Value ) ); // 2 is the result
Related
I get a string which has CDATA and I want to remove that.
Input : "<Text><![CDATA[Hello]]></Text><Text><![CDATA[World]]></Text>"
Output I want : <text>Hello</text>
<text>World</text>
I want to take all data between <text> and </text> and add it to a list.
The code I try is :
private List<XElement> Foo(string input)
{
string pattern = "<text>(.*?)</text>";
input = "<Text><![CDATA[Hello]]></Text><Text><![CDATA[World]]></Text>" //For Testing
var matches = Regex.Matches(input, pattern, RegexOptions.IgnoreCase);
var a = matches.Cast<Match>().Select(m => m.Groups[1].Value.Trim()).ToArray();
List<XElement> li = new List<XElement>();
XElement xText;
for (int i = 0; i < a.Length; i++)
{
xText = new XElement("text");
xText.Add(System.Net.WebUtility.HtmlDecode(a[i]));
li.Add(xText);
}
return li;
}
But, Here I get output as :
<text><![CDATA[Hello]]></text>
<text><![CDATA[World]]></text>
Can anyone please help me up.
It seems to me that you shouldn't be using a regular expression at all. Instead, construct a valid XML document be wrapping it all in a root element, then parse it and extract the elements you want.
You also want to replace all CDATA nodes with their equivalent text nodes. You can do that before or after you extract the elements into a list, but I've chosen to do it before:
using System;
using System.Linq;
using System.Xml.Linq;
class Test
{
static void Main()
{
string input = "<Text><![CDATA[Hello]]></Text><Text><![CDATA[World]]></Text>";
string xml = "<root>" + input + "</root>";
var doc = XDocument.Parse(xml);
var nodes = doc.DescendantNodes().OfType<XCData>().ToList();
foreach (var node in nodes)
{
node.ReplaceWith(new XText(node.Value));
}
var elements = doc.Root.Elements().ToList();
elements.ForEach(Console.WriteLine);
}
}
I would use XDocument instead of Regex:
var value = "<root><Text><![CDATA[Hello]]></Text><Text><![CDATA[World]]></Text></root>";
var doc = XDocument.Parse(value);
Console.WriteLine (doc.Root.Elements().ElementAt(0).Value);
Console.WriteLine (doc.Root.Elements().ElementAt(1).Value);
Ouput:
Hello
World
I'm almost getting there, but I need some help.
This is the code that I use to process our XML file. I'm able to find the section that I need to store; I just don't know how to save it.
XmlDocument doc = new XmlDocument();
doc.XmlResolver = null;
doc.Load(#"c:\xml\Sales.xml");
XmlElement root = doc.DocumentElement;
XmlNodeList nodes = root.SelectNodes("nd/ni/nv/noid");
foreach (XmlNode node in nodes)
{
if (node.OuterXml.IndexOf("Server=1,Function=1,Location=") > 0)
{
Console.WriteLine(node.OuterXml);
// This prints out "<noid>Server=1,Function=1,Location=24</noid>"
// How do I read the four <r> nodes within this <noid>?
// The values would be [124, 2, 43, 90]
}
}
The xml looks something like this:
<nd>
<ni>
<nv>
<noid>Managed=1,Network=1,smtp=1</noid>
<r>27</r>
<r>4</r>
</nv>
<nv>
<noid>Managed=1,Network=1,Ibc=1</noid>
<r>8</r>
<r>2</r>
</nv>
<nv>
<noid>Server=1,Function=1,Location=24</noid>
<r>124</r>
<r>2</r>
<r>43</r>
<r>90</r>
</nv>
<nv>
<noid>Unmanaged=9,Label=7,Place=5</noid>
<r>10</r>
<r>20</r>
</nv>
</ni>
</nd>
Console.WriteLine prints the correct <noid> text, so I know that I've already found the section with the relevant data.
My question is, how can I read the four <r> inside this <noid>? Ideally, within the IF statement, how can I read all the <r> elements that are between the <nv></nv>?
Thanks.
Using Linq-to-xml
var xmlText = File.ReadAllText(#"C:\YourDirectory\YourFile.xml");
var xDoc = XDocument.Parse(xmlText);
var rValues = new List<string>(); //THIS IS YOUR RESULT
var nvNodes = xDoc.Descendants("nv");
foreach(var el in nvNodes)
{
if (el.Element("noid").Value.Contains("Server=1,Function=1,Location="))
rValues = el.Elements("r").Select(e => e.Value).ToList();
}
Or, replacing the foreach with Linq (fails if First() is not satisfied)
var rValues = nvNodes.
First(nv => nv.Value.Contains("Server=1,Function=1,Location="))
.Elements("r")
.Select(r => r.Value);
A non-optimized, non-linq solution
XmlDocument doc = new XmlDocument();
doc.XmlResolver = null;
doc.Load(#"C:\YourDirectory\YourFile.xml");
var rValues = new List<string>(); //THIS IS YOUR RESULT
XmlElement root = doc.DocumentElement;
XmlNodeList nodes = root.SelectNodes("//nd/ni/nv");
foreach (XmlNode node in nodes)
{
if (node.FirstChild.InnerText.Contains("Server=1,Function=1,Location="))
{
foreach(XmlNode childnode in node.ChildNodes)
{
if (childnode.Name == "r")
rValues.Add(childnode.InnerText);
}
}
}
Try this
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string input =
"<nd>" +
"<ni>" +
"<nv>" +
"<noid>Managed=1,Network=1,smtp=1</noid>" +
"<r>27</r>" +
"<r>4</r>" +
"</nv>" +
"<nv>" +
"<noid>Managed=1,Network=1,Ibc=1</noid>" +
"<r>8</r>" +
"<r>2</r>" +
"</nv>" +
"<nv>" +
"<noid>Server=1,Function=1,Location=24</noid>" +
"<r>124</r>" +
"<r>2</r>" +
"<r>43</r>" +
"<r>90</r>" +
"</nv>" +
"<nv>" +
"<noid>Unmanaged=9,Label=7,Place=5</noid>" +
"<r>10</r>" +
"<r>20</r>" +
"</nv>" +
"</ni>" +
"</nd>";
XElement nd = XElement.Parse(input);
var results = nd.Descendants("nv").Select(x => new
{
noid = (string)x.Element("noid"),
r = x.Elements("r").Select(y => (int)y).ToList()
}).ToList();
}
}
}
A short, but difficult to understand XPath expression:
XmlNodeList rNodes = root.SelectNodes(
"nd/ni/nv[noid/text()[contains(.,'Server=1,Function=1,Location=')]]/r");
foreach (XmlNode rNode in rNodes)
Console.WriteLine(rNode.InnerText);
I've spent so much time with this already, still can't get the value of NTE attribute. Can someone please help?
C#
StreamReader sr = new StreamReader(resp.GetResponseStream());
XPathDocument xmlDoc = new XPathDocument(sr); // holds xml document
XPathNavigator xmlNav = xmlDoc.CreateNavigator(); //evaluates XPath expressions
XPathNodeIterator node = xmlNav.Select("/DATA2SC/CALL");
string dne = xmlNav.GetAttribute("NTE", "");
Console.WriteLine(dne);
sr.Close();
XML
<?xml version="1.0"?>
<DATA2SC PIN="00000">
<CALL
TR_NUM="00000001"
STATUS="WAITING_FOR_APPROVAL"
NTE="$15.00">
<PROBLEM>
Text
</PROBLEM>
</CALL>
</DATA2SC>
Can you try this code please ?
I already check and it's work
StreamReader sr = new StreamReader("c:\\x.xml");
XPathDocument xmlDoc = new XPathDocument(sr); // holds xml document
XPathNavigator xmlNav = xmlDoc.CreateNavigator(); //evaluates XPath expressions
var node = xmlNav.SelectSingleNode("/DATA2SC/CALL");
string dne = node.GetAttribute("NTE", "");
Console.WriteLine(dne);
OR
XDocument docXmlWorld = XDocument.Load("c:\\x.xml");
foreach (var node1 in docXmlWorld.Descendants("DATA2SC"))
{
foreach (var node2 in node1.Descendants("CALL"))
{
string dne = node2.Attribute("NTE").Value;
Console.Out.WriteLine(dne);
}
}
Or you can do like this too:
XDocument docXmlWorld = XDocument.Load("c:\\x.xml");
//Get the first child => [DATA2SC]
XElement elementNodeDATA2SC = docXmlWorld.Element("DATA2SC");
//Get the first child => [CALL]
XElement elementNodeCALL = elementNodeDATA2SC.Element("CALL");
//Get the attribute NTE from [CALL] node
string dne = elementNodeCALL.Attribute("NTE").Value;
Console.Out.WriteLine(dne);
The Select method, returns a collection of all nodes with the specified XPath.
You can use SelectSingleNode, to select the first node.
var node = xmlNav.SelectSingleNode("/DATA2SC/CALL");
string dne = node.GetAttribute("NTE", "");
I am trying to remove the last node from an XML file, but cannot find any good answers for doing this. Here is my code:
XmlReader x = XmlReader.Create(this.PathToSpecialFolder + #"\" + Application.CompanyName + #"\" + Application.ProductName + #"\Recent.xml");
int c = 0;
while (x.Read())
{
if (x.NodeType == XmlNodeType.Element && x.Name == "Path")
{
c++;
if (c <= 10)
{
MenuItem m = new MenuItem() { Header = x.ReadInnerXml() };
m.Click += delegate
{
};
openRecentMenuItem.Items.Add(m);
}
}
}
x.Close();
My XML node structure is as follows...
<RecentFiles>
<File>
<Path>Text Path</Path>
</File>
</RecentFiles>
In my situation, there will be ten nodes maximum, and each time a new one is added, the last must be removed.
You can try this
XmlDocument doc = new XmlDocument();
doc.Load(fileName);
XmlNodeList nodes = doc.SelectNodes("/RecentFiles/File");
nodes[nodes.Count].ParentNode.RemoveChild(nodes[nodes.Count]);
doc.Save(fileName);
It sounds like you want something like:
var doc = XDocument.Load(path);
var lastFile = doc.Descendants("File").LastOrDefault();
if (lastFile != null)
{
lastFile.Remove();
}
// Now save doc or whatever you want to do with it...
<Sections>
<Classes>
<Class>VI</Class>
<Class>VII</Class>
</Classes>
<Students>
<Student>abc</Student>
<Student>def</Student>
</Students>
</Sections>
I have to loop through Classes to get 'Class' into an array of strings. I have to also loop through 'Students' to get 'Student' put into an array of strings.
XDocument doc.Load("File.xml");
string str1;
foreach(XElement mainLoop in doc.Descendants("Sections"))
{
foreach(XElement classLoop in mainLoop.Descendants("Classes"))
str1 = classLoop.Element("Class").Value +",";
//Also get Student value
}
is not working to get all the classes. Also, I need to rewrite this without using LINQ to XML, i.e using XmlNodeList and XmlNodes.
XmlDocument doc1 = new XmlDocument();
doc1.Load("File.xml");
foreach(XmlNode mainLoop in doc.SelectNodes("Sections")) ??
Not sure how to go about it.
The XPath is straightforward. To get the results into an array you can either use LINQ or a regular loop.
var classNodes = doc.SelectNodes("/Sections/Classes/Class");
// LINQ approach
string[] classes = classNodes.Cast<XmlNode>()
.Select(n => n.InnerText)
.ToArray();
var studentNodes = doc.SelectNodes("/Sections/Students/Student");
// traditional approach
string[] students = new string[studentNodes.Count];
for (int i = 0; i < studentNodes.Count; i++)
{
students[i] = studentNodes[i].InnerText;
}
Not sure about rewriting it for XmlNodes but for your Classes and Students you can simply:
XDocument doc.Load("File.xml");
foreach(XElement c in doc.Descendants("Class"))
{
// do something with c.Value;
}
foreach(XElement s in doc.Descendants("Student"))
{
// do something with s.Value;
}
With LINQ to XML:
XDocument doc = XDocument.Load("file.xml");
var classNodes = doc.Elements("Sections").Elements("Classes").Elements("Class");
StringBuilder result = new StringBuilder();
foreach( var c in classNodes )
result.Append(c.Value).Append(",");
With XPath:
XmlDocument doc = new XmlDocument();
doc.Load("file.xml");
var classNodes = doc.SelectNodes("/Sections/Classes/Class/text()");
StringBuilder result = new StringBuilder();
foreach( XmlNode c in classNodes )
result.Append(c.Value).Append(",");