Question

I have two Nodes node1 and nod2 which have different parent documents, now I want to call

node1.appendChild(node2);

function for this nodes but my application crashes, below you can see owner documents and XMLs of nodes.

Document document1 = node1.getOwnerDocument();
Document document2 = node2.getOwnerDocument();

Both nodes have different owner documents. node1 owner document described below

<?xml version="1.0" encoding="UTF-8"?>
<ClientGetOTPSeedMessage>
    <UserID>userID</UserID>
    <DeviceInfo/>
</ClientGetOTPSeedMessage>

and node2 owner document is as follow:

<?xml version="1.0" encoding="UTF-8"?>
<Desc>
    <Desc1>First name</Desc1>
    <Desc2>Second name</Desc2>
</Desc>

Now I want to get </Desc> node from document2 and put it to <DeviceInfo/> node in the document1 how I can do it. And I want to say that node1 and node2 keep the nodes which I want to add one to another, but when I write

node1.appendChild(node2); 

my application crashes, I guess the main reason is that they have different owner documents.

Answer 1

The reason the application crashes is, as you said,the different owner documents (see this for more details). To solve the problem you should import node2 in document1, like this:

n2 = document1.importNode(n2, true);

and then:

 n1.appendChild(n2);

More info about import here.