XML exercises (1)

Understanding: XML has several verification methods, DTD and mode. That is, the pattern is used to verify whether the XML meets the requirements.

081223

1. // Write
2. // Dataset DS = oledbhelper. executeds ("select * From userinfo ");
3. // Ds. writexml (server. mappath (@"~ /Xmlstudy/") +" 123.xml ");
5. // Read
6. Dataset DS = new dataset ();
7. DS. readxml (server. mappath (@"~ /Xmlstudy/") +" 123.xml ");

081222

Boyi helps implement a small function

1. Xmldocument Doc = new xmldocument ();
2. Doc. Load (@ "../test. xml"); // load the XML document
3. Xmlnode root = Doc. documentelement; // get the document root node
4. If (root. haschildnodes)
5. {
6. Xmlnode ELEM = Doc. createnode (xmlnodetype. element, "category", null );
7. String XPath = "Descendant: level-1 node [/root node/level-1 node [name = 'tree']";
8. Xmlnodelist xnlist = Doc. selectnodes (XPath );
9. Foreach (xmlnode item in xnlist)
10. {
11. ELEM. appendchild (item );
12. }
13. Root. prependchild (ELEM );
14. Doc. Save (@ "../test. xml ");
15. Console. Write (Doc. innerxml );
16. }

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Root node>
3. <Category>
4. <Level 1 node id = "001">
5. <Name> tree </Name>
6. <Sex> male </sex>
7. </Primary node>
8. <Level 1 node id = "002">
9. <Name> Boyi </Name>
10. <Sex> female </sex>
11. </Primary node>
12. </Category>
13. </Root node>
14. <! -- Modified data
15. <Root node>
16. <Level 1 node id = "001">
17. <Name> tree </Name>
18. <Sex> male </sex>
19. </Primary node>
20. <Level 1 node id = "002">
21. <Name> Boyi </Name>
22. <Sex> female </sex>
23. </Primary node>
24. </Root node>
25. -->

End