How to retrieve / get the childnodes in XML? C# linq to XML

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Hello Everyone,

I have a problem statement where I want to retrieve the child nodes of the Particular ID
using Linq to XML I am able to get the whole node data along with the other data, how can I extract the child node from Environment.

Here's my XML file structure :

<ProjectEnvironments>
<ProjectEnvironment>
    <ProjectId>22</ProjectId>
    <ProjectName>Proj22</ProjectName>
    <GroupName>Group</GroupName>
    <ProjectApIUrl>http://localhost.dell.com/PremierToolsUX#/Gvt/API</ProjectApIUrl>
    <ProjectUrl>http://localhost.dell.com/PremierToolsUX#/Gvt</ProjectUrl>
    <Environments>
      <Environment>
        <EnvId>22</EnvId>
        <EnvName>Proj22</EnvName>
      </Environment>
      <Environment>
        <EnvId>33</EnvId>
        <EnvName>Proj33</EnvName>
      </Environment>
    </Environments>
  </ProjectEnvironment>
</ProjectEnvironments>

using the below code I am able to get the whole XML data based on the ProjectId, how can I get the data of Environments i.e. all EnvId and EnvName for the same node of ProjectId ?

XDocument _XDocument = XDocument.Load(@"C:\test.xml");
var items = from item in _XDocument.Elements("ProjectEnvironments").Elements("ProjectEnvironment")
                                where item != null && (item.Element("ProjectId").Value == projectId)
                                select item;

to get the Environments I tried the below code which is giving object reference error

var Envs = from itemz in _XDocument.Descendants("ProjectEnvironments").Descendants("ProjectEnvironment").Descendants("Environments").Descendants("Environment")
           where item != null && (item.Element("EnvId").Value == _environments[0].EnvId)
           select item;

Could anyone help me in getting this solved?
Thanks in Advance

What I have tried:

Here's my XML file structure : 
<pre>
<ProjectEnvironments>
<ProjectEnvironment>
    <ProjectId>22</ProjectId>
    <ProjectName>Proj22</ProjectName>
    <GroupName>Group</GroupName>
    <ProjectApIUrl>http://localhost.dell.com/PremierToolsUX#/Gvt/API</ProjectApIUrl>
    <ProjectUrl>http://localhost.dell.com/PremierToolsUX#/Gvt</ProjectUrl>
    <Environments>
      <Environment>
        <EnvId>22</EnvId>
        <EnvName>Proj22</EnvName>
      </Environment>
      <Environment>
        <EnvId>33</EnvId>
        <EnvName>Proj33</EnvName>
      </Environment>
    </Environments>
  </ProjectEnvironment>
</ProjectEnvironments>

using the below code I am able to get the whole XML data based on the ProjectId, how can I get the data of Environments i.e. all EnvId and EnvName for the same node of ProjectId ?

XDocument _XDocument = XDocument.Load(@"C:\test.xml");
var items = from item in _XDocument.Elements("ProjectEnvironments").Elements("ProjectEnvironment")
                                where item != null && (item.Element("ProjectId").Value == projectId)
                                select item;

to get the Environments I tried the below code which is giving object reference error

var Envs = from itemz in _XDocument.Descendants("ProjectEnvironments").Descendants("ProjectEnvironment").Descendants("Environments").Descendants("Environment")
           where item != null && (item.Element("EnvId").Value == _environments[0].EnvId)
           select item;

Could anyone help me in getting this solved?

Posted 26-Dec-19 19:41pm

Nischal Bhatt

Updated 26-Dec-19 23:42pm

v2

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RickZeeland · Answer 1 · 2019-12-26T23:42:00

Solution 1

Try this:

XDocument xdoc = XDocument.Load(@"C:\test.xml");
var envs = from lv1 in xdoc.Descendants("Environment") where lv1.Element("EnvId").Value == "22" select new { lv1 };

foreach (var env in envs)
{
    Debug.Print("val = " + env.lv1.Element("EnvName").Value + Environment.NewLine);
}

Posted 26-Dec-19 23:42pm

RickZeeland

Updated 26-Dec-19 23:45pm

v2

Comments

Nischal Bhatt 27-Dec-19 10:16am

Thanks RickZeeland,

This will give me the data for single EnvId, how can I change this query so that It returns the list of EnvId and EnvName? I'm stuck at this scenario

RickZeeland 27-Dec-19 11:03am

Then you can use:
var envs = from lv1 in xdoc.Descendants("Environment") select new { lv1 };