A few days ago, I was engaged in RSS analysis and encountered some problems.

RSS is now very popular and once popular on the Internet. Indeed, it has brought us great changes and convenience! There are also many RSS versions, including rss.1.0.rss2.0 and Atom!
I encountered a lot of problems when parsing, because I have not studied XML and related parsing work, so I have encountered a lot of problems and can successfully parse rss2.0 at present.
Some resolutions on the top (for now, I don't know what it is)

1 Private   Void Getrsshead (xmldocument DOC)
2 {
3 // Xmldocument Doc = new xmldocument ();
4 // Doc. loadxml (this. rssxmlstr );
5 Xmlelement ELEM = (Xmlelement) Doc. documentelement. firstchild;
6 This . Headtitle = ELEM. selectsinglenode ( " Title " ). Innertext;
7 This . Headurl = ELEM. selectsinglenode ( " Link " ). Innertext;
8 This . Headdescription = ELEM. selectsinglenode ( " Description " ). Innertext;
9
10 }

Content parsing:

1 Private   Void Parseitems ()
2 {
3 Xmldocument Doc =   New Xmldocument ();
4 Doc. loadxml ( This . Rssxmlstr );
5 Xmlnodelist nodelist;
6 Xmlelement Root = Doc. documentelement;
7 Nodelist = Root. getelementsbytagname ( " Item " );
8 For ( Int N = 0 ; N < Nodelist. Count; n ++ )
9 {
10 Listtitle. Add (nodelist [N]. selectsinglenode ( " Title " ). Innertext );
11 Listlink. Add (nodelist [N]. selectsinglenode ( " Link " ). Innertext );
12 Listdescription. Add (nodelist [N]. selectsinglenode ( " Description " ). Innertext );
13 }
14 }

However, for rss1.0, I can only handle this currently: 1 // Header
2 Nodelist = Root. getelementsbytagname ( " Channel " );
3 This . Headtitle = Nodelist [ 0 ]. Childnodes [ 0 ]. Innertext;
4 This . Headurl = Nodelist [ 0 ]. Childnodes [ 1 ]. Innertext;
5 This . Headdescription = Nodelist [ 0 ]. Childnodes [ 2 ]. Innertext;
6

You cannot use selectsinglenode to retrieve elements. In this way, RSS cannot change the order, and the atom format cannot be processed well!