合并两个xml文件LINQ

Question

I have problem merging two XML files. I loaded both files into two objects, located the target nodes in both objects and tried to merge.

Here is a sample:

var nodes1 = XResult1.Descendants("subject");
var nodes2 = XResult2.Descendants("subject");

//nodes1.Add(nodes2.Nodes());

// * Code to merge** Can somebody pls help me. Thanks in advance... BB

Here is my XResult1:

<subjects>
    <subject>
        <node id="1">
            Hi
        </node>
        <node id="2">
            Hi again
        </node>
        <node id="3">
            Hi once more
        </node>
    </subject>
</subjects>

Here is my XResult2 :

<subjects>
    <subject>
        <node id="4">
            Hello
        </node>
        <node id="5">
            Hello again
        </node>
    </subject>
</subjects>

And my final Result should be :

<subjects>
    <subject>
        <node id="1">
            Hi
        </node>
        <node id="2">
            Hi again
        </node>
        <node id="3">
            Hi once more
        </node>
        <node id="4">
            Hello
        </node>
        <node id="5">
            Hello again
        </node>

    </subject>
</subjects>

Answer 1

You want to change:

XResult1.Descendants("subjects").FirstOrDefault(); 
XResult2.Descendants("subjects").FirstOrDefault();

to

XResult1.Descendants("subject").FirstOrDefault();
XResult2.Descendants("subject").FirstOrDefault(); 

Here is a more complete example:

XDocument document = XDocument.Load(@"C:\XResult1.xml");
XElement subjectElement = document.Descendants("subject").FirstOrDefault();

XDocument document2 = XDocument.Load(@"C:\XResult2.xml");
XElement subjectElement2 = document2.Descendants("subject").FirstOrDefault();

subjectElement.Add(subjectElement2.Nodes());

Answer 2

如果要合并subject元素内的元素，则需要在树中进一步下移，因此将nodes1和nodes2设置为以下内容：

XElement nodes2 = XResult2.Descendants("subjects").Descendants("subject").FirstOrDefault();