ASP. NET XML

Xmldocument Doc = New  Xmldocument ();  //  Selectsinglenote and selectnodes Doc. Load ( "  Data. xml  "  ); Xmlnodelist xnlist = Doc. selectnodes ( "  Books/book  "  );  Foreach (Xmlnode XN In Xnlist) {console. writeline (Xn. outerxml); xmlnode titlenode = Xn. selectsinglenode ( "  Title  "  ); Console. writeline (Xn. innertext); console. writeline (  "    "  );}  //  Add xmlnode attribute and get attributornote Doc. Load ( "  Data5.xml "  ); Xmlnodelist xn1list = Doc. selectnodes ( "  Books/book  "  );  Foreach (Xmlnode XN In  Xn1list) {xmlattribute xmlattr = Doc. createattribute ( "  Author  "  ); Xmlattr. Value ="  Gzh4455  "  ; XN. Attributes. append (xmlattr );  //  Xmlattribute idattributor = xn. attributes ["ID"];  //  Console. writeline (idattributor. value );  //  Console. writeline ("");  } Doc. Save (  "  Data5.xml  " ); Console. readkey ();  //  Loadxml and createnode and save xmldocument Doc. loadxml ( "  <Book> <title> morning </title> <price> 20.5 </price> </book>  "  ); Xmlnode xne = Doc. createnode ( "  Element  " , "  Pages  " ,""  ); Xne. innertext = "  290  "  ; Xmlelement rootelement = Doc. documentelement; rootelement. appendchild (xne); console. Write (Doc. outerxml); Doc. Save (  "  Data. xml  "  ); Console. readkey ();  //  Doc. Load ("data4.xml "); //  Xmlnode xn = Doc. selectsinglenode ("book/person/age ");  //  XN. innertext = "30 ";  //  Doc. Save ("data4.xml ");  //  Console. writeline (Xn. innertext );  //  Appendchild Doc. Load ( "  Data. xml  " ); Console. writeline (Doc. outerxml); xmlnode xn2 = Doc. createnode ( "  Element  " , "  Person  " , ""  ); Xmlnode age = Doc. createnode ( "  Element  " , "  Age " , ""  ); Age. innertext = "  28  "  ; Xn2.appendchild (AGE); Doc. documentelement. appendchild (xn2); Doc. Save (  "  Data. xml  "  );  //  Xmltextwriter writer = new xmltextwriter ("data4.xml", null );  // Writer. Formatting = formatting. indented;  //  Doc. Save (writer );  Console. readkey (); 

 

The following are some methods that have been tried