Develop Reference

Unable to parse xml string using Xdocument and Linq

I would like to parse the below xml using XDocument in Linq.
<?xml version="1.0" encoding="UTF-8"?>
<string xmlns="http://tempuri.org/">
<Sources>
<Item>
<Id>1</Id>
<Name>John</Name>
</Item>
<Item>
<Id>2</Id>
<Name>Max</Name>
</Item>
<Item>
<Id>3</Id>
<Name>Ricky</Name>
</Item>
</Sources>
</string>
My parsing code is :
var xDoc = XDocument.Parse(xmlString);
var xElements = xDoc.Element("Sources")?.Elements("Item");
if (xElements != null)
foreach (var source in xElements)
{
Console.Write(source);
}
xElements is always null. I tried using namespace as well, it did not work. How can I resolve this issue?

Try below code:
string stringXml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><string xmlns=\"http://tempuri.org/\"><Sources><Item><Id>1</Id><Name>John</Name></Item><Item><Id>2</Id><Name>Max</Name></Item><Item><Id>3</Id><Name>Ricky</Name></Item></Sources></string>";
XDocument xDoc = XDocument.Parse(stringXml);
var items = xDoc.Descendants("{http://tempuri.org/}Sources")?.Descendants("{http://tempuri.org/}Item").ToList();
I tested it and it correctly shows that items has 3 lements :) Maybe you used namespaces differently (it's enough to inspect xDoc objct in object browser and see its namespace).

You need to concatenate the namespace and can directly use Descendants method to fetch all Item nodes like:
XNamespace ns ="http://tempuri.org/";
var xDoc = XDocument.Parse(xmlString);
var xElements = xDoc.Descendants(ns + "Item");
foreach (var source in xElements)
{
Console.Write(source);
}
This prints on Console:
<Item xmlns="http://tempuri.org/">
<Id>1</Id>
<Name>John</Name>
</Item><Item xmlns="http://tempuri.org/">
<Id>2</Id>
<Name>Max</Name>
</Item><Item xmlns="http://tempuri.org/">
<Id>3</Id>
<Name>Ricky</Name>
</Item>
See the working DEMO Fiddle

Parse Xml with multiple namespaces with C#

I have been unable to parse an Xml which contains multiple namespaces as below:
<?xml version="1.0" encoding="UTF-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Header>
<h:ServerVersionInfo xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" MajorVersion="14" MinorVersion="3" MajorBuildNumber="352" MinorBuildNumber="0" Version="Exchange2010_SP2" />
</s:Header>
<s:Body xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<GetMailTipsResponse xmlns="http://schemas.microsoft.com/exchange/services/2006/messages" ResponseClass="Success">
<ResponseCode>NoError</ResponseCode>
<ResponseMessages>
<MailTipsResponseMessageType ResponseClass="Success">
<ResponseCode>NoError</ResponseCode>
<m:MailTips xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages">
<t:RecipientAddress xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<t:Name />
<t:EmailAddress>emailaddress#organization.com</t:EmailAddress>
<t:RoutingType>SMTP</t:RoutingType>
</t:RecipientAddress>
<t:PendingMailTips xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" />
<t:OutOfOffice xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<t:ReplyBody>
<t:Message />
</t:ReplyBody>
</t:OutOfOffice>
</m:MailTips>
</MailTipsResponseMessageType>
</ResponseMessages>
</GetMailTipsResponse>
</s:Body>
</s:Envelope>
I tried the following code but as you can see the first node with Soap Name Space works fine but thereafter I am unable to retrieve the node information that I need which is the node -
/s:Envelope/s:Body/GetMailTipsResponse/ResponseMessages/MailTipsResponseMessageType/m:MailTips/t:RecipientAddress/t:Message
Here is the code that I tried:
string getXmlInfo (string resultXml)
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(resultXml);
XmlNamespaceManager soapNsManager = new XmlNamespaceManager(xmlDoc.NameTable);
soapNsManager.AddNamespace("s", "http://schemas.xmlsoap.org/soap/envelope/");
XmlNode xmlNode = xmlDoc.SelectSingleNode("//s:Envelope/s:Body", soapNsManager); //works fine - the node now contains the Xml starting with the node
XmlNode xmlNode1 = xmlDoc.SelectSingleNode("//s:Envelope/s:Body/GetMailTipsResponse/ResponseMessages/MailTipsResponseMessageType", soapNsManager); //returns NULL
XmlNode innerNode1 = xmlNode.SelectSingleNode("//GetMailTipsResponse/ResponseMessages/MailTipsResponseMessageType"); // returns NULL
XmlNode innerNode2 = xmlNode.SelectSingleNode("//GetMailTipsResponse", soapNsManager); //returns NULL
// the next line throws an exception
//XmlNode messageNode = xmlDoc.SelectSingleNode("/s:Envelope/s:Body/GetMailTipsResponse/ResponseMessages/MailTipsResponseMessageType/m:MailTips/t:RecipientAddress/t:Message", manager);
}
Here is what I tried based on response from #LocEngineer:
XmlNamespaceManager manager = new XmlNamespaceManager(xmlDoc.NameTable);
manager.AddNamespace("s", "http://schemas.xmlsoap.org/soap/envelope/");
manager.AddNamespace("blank", "http://schemas.microsoft.com/exchange/services/2006/types");
manager.AddNamespace("m", "http://schemas.microsoft.com/exchange/services/2006/types");
manager.AddNamespace("t", "http://schemas.microsoft.com/exchange/services/2006/types");
XmlNode messageNode = xmlDoc.SelectSingleNode("/s:Envelope/s:Body/blank:GetMailTipsResponse/blank:ResponseMessages/blank:MailTipsResponseMessageType/m:MailTips/t:OutOfOffice/t:ReplyBody/t:Message", manager);
The messageNode shows up as NULL

You also need an XmlNamespaceManager prefix for the prefix-less namespace introduced in GetMailTipsResponse node, which contains the nodes without prefix in XML:
GetMailTipsResponse xmlns="http://schemas.microsoft.com/exchange/services/2006/messages"
And then use that in your XPath appropriately, using "m" as prefix for the prefix-less nodes:
XmlNamespaceManager soapNsManager = new XmlNamespaceManager(xmlDoc.NameTable);
soapNsManager.AddNamespace("s", "http://schemas.xmlsoap.org/soap/envelope/");
soapNsManager.AddNamespace("m", "http://schemas.microsoft.com/exchange/services/2006/messages");
XmlNode xmlNode1 = xmlDoc.SelectSingleNode("/s:Envelope/s:Body/m:GetMailTipsResponse/m:ResponseMessages/m:MailTipsResponseMessageType", soapNsManager);

Read element from SOAP message

I'm trying to read the APP_DATE element in this xml message. Tried using LINQ but unable to read MyResult
<?xml version="1.0" encoding="utf-8" ?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<MyResponse xmlns="http://tempuri.org/">
<MyResult>
<APP_TYPE>I</APP_TYPE>
<APP_NO>152240</APP_NO>
<APP_DATE>10/03/2016</APP_DATE>
</MyResult>
</MyResponse>
</soap:Body>
</soap:Envelope>

Can't be sure because you didn't supply any example code but I assume you struggle because of the namespaces. So try this:
XmlDocument doc = new XmlDocument();
doc.Load("data.xml");
XmlNamespaceManager ns = new XmlNamespaceManager(doc.NameTable);
ns.AddNamespace("soap", "http://www.w3.org/2003/05/soap-envelope");
ns.AddNamespace("x", "http://tempuri.org/");
var result = doc.SelectSingleNode("//soap:Envelope/soap:Body/x:MyResponse/x:MyResult/x:APP_DATE", ns).InnerText;
For deeper understanding you can read this question
Using Linq it will be like this:
var result = XDocument.Load("data.xml").Root
.Descendants(XName.Get("APP_DATE", "http://tempuri.org/"))
.FirstOrDefault()?.Value;
See how in both examples I have to specify the namespaces of what I'm looking for

Reading an innertext from an xml document

How do I get the innertext of the OverallResult element using SelectSingleNode?
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<ProcessResp xmlns="http://www.w3.org/2005/Atom">
<Result>
<OverallResult>Success</OverallResult>

var doc = new XmlDocument();
doc.LoadXml(xml);
var text = doc.SelectSingleNode("Example/Node/text()").InnerText; // or .Value
returns
"Some text here\r\n "
and text.Trim() returns
"Some text here"
Please go through the below link for XML related queries its very useful for begginers!
http://www.dotnetcurry.com/ShowArticle.aspx?ID=564
for your answer(i havnt tried it though try by changing like this in ur code)
doc.SelectSingleNode("soap/ProcessResp/ Result/OverallResult/text()").InnerText;

XMLDocument Access To Last Child

i'm developing sitemap project and have a problem;
this is my xml file
<?xml version="1.0" encoding="UTF-8"?>
<urlset>
<url ID="1">
<loc>http://www.serkancamur.com/Site/Index/sayfa/Hakkimda</loc>
<changefreq>Daily</changefreq>
<priority>0,9</priority>
</url>
</urlset>
this is my c# code:
int ID = Convert.ToInt32(doc.SelectSingleNode("urlset").LastChild.Attributes["ID"].Value);
this works but look to urlset element attributes:
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" schemaLocation="http://www.serkancamur.com/sitemap.xsd">
<url ID="1">
<loc>http://www.serkancamur.com/Site/Index/sayfa/Hakkimda</loc>
<changefreq>Daily</changefreq>
<priority>0,9</priority>
</url>
</urlset>
i only added attributes to urlset element,so why this doesn't work?

You need to use XmlNamespaceManager
Try this
int id = 0;
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("x", "http://www.sitemaps.org/schemas/sitemap/0.9");
var urlset = doc.SelectSingleNode("//x:urlset", nsmgr);
id = Convert.ToInt32(urlset.LastChild.Attributes["ID"].Value);
Hope this helps