Please explain how to handle

Question

iam reading some value from a file and write to another file.In the reading file contains
<edm:fromReference>268520629#268771030</edm:fromReference>
<edm:OrderItem>
<edm:Order orderID="1024560"/>
<edm:fromReference>1024560</edm:fromReference>
<edm:fromLegalEntity legalEntityID="01000908">
<edm:Identifier>01000908</edm:Identifier>
</edm:fromLegalEntity>
</edm:OrderItem>
these following i want output 1024560 (<edm:fromReference>) inside order item .......in the above case(<edm:fromReference>) comes two times but inside<edm:OrderItem>&</edm:OrderItem>i only need.....these are differnt lines.....can any body please help with code

Answer 1

OK...do you know what XML is? Are you aware that the text you posted in XML?
Well, it is.
OK, now what you're asking for is a way to get data out of the XML you posted. Well, that's called parsing! What you're doing is parsing! Even if you don't want to call it parsing, that's what you're doing!
So the question isn't, do you want or need an XML parser; the question is whether you're going to write your own or reuse another.
It looks like you're dead set on writing your own, presumably with lots of hardcoded stuff for the issue at hand. Fair enough. The way a person would do this is by searching the text for strings that have special meaning, then keeping track of the data you tease out of it, until you find the data you're looking for. You've already started to do that.
Given the requirements you've described, you're going to have to keep track of tags you've already seen, in a boolean variable that indicates whether you're "inside" a particular pair of opening and closing tags. Then you get to keep track of whether you've found a particular datum. Combine that datum with the flag and you've got your output. I've already told you how to do this.
You can use regular expressions to make this easier. I've already told you about that too.
Personally, I have no desire to write poor code. So I'm not going to do this for you. But I've given you plenty of information to learn how to do it yourself, and you're free to ask about the details.
So good luck!