delphi Éú³Éxml ·½·¨ Óë delphi txtÎļþ²Ù×÷

Procedure TForm1.Button1Click(Sender: TObject);
Var
xmlstr,FileName: String;
f: Textfile;
Begin
xmlStr := '<?xml version="1.0" encoding="gb2312"?>';
xmlstr := xmlstr + '<user><name>ÕÅÈý</name><sex>ÄÐ</sex></user>';
showmessage(xmlstr);
FileName:='a.xml';
If fileExists(FileName) Then DeleteFile(FileName); {¿´ÎļþÊÇ·ñ´æÔÚ,ÔÚ¾Í刪³ý}
AssignFile(F, FileName); {½«ÎļþÃûÓë±äÁ¿ F ¹ØÁª}
ReWrite(F); {´´½¨Ò»¸öеÄÎļþ²¢ÃüÃûΪ ek.txt}
Writeln(F, xmlstr);
Closefile(F); {¹Ø±ÕÎļþ F}
End;
Procedure NewTxt(FileName:String);
Var
F : Textfile;
Begin
if fileExists(FileName) then DeleteFile(FileName); {¿´ÎļþÊÇ·ñ´æÔÚ,ÔÚ¾Í刪³ý}
AssignFile(F, FileName); {½«ÎļþÃûÓë±äÁ¿ F ¹ØÁª}
ReWrite(F); {´´½¨Ò»¸öеÄÎļþ²¢ÃüÃûΪ ek.txt}
Writeln(F, '½«ÄúҪдÈëµÄÎı¾Ð´Èëµ½Ò»¸ö .txt Îļþ');
Closefile(F); {¹Ø±ÕÎļþ F}
End;
Procedure OpenTxt(FileName:String);
Var
F : Textfile;
Begin
AssignFile(F,FileName); {½«ÎļþÃûÓë±äÁ¿ F ¹ØÁª}
Append(F); {ÒԱ༭·½Ê½´ò¿ªÎļþ F }
Writeln(F, '½«ÄúҪдÈëµÄÎı¾Ð´Èëµ½Ò»¸ö .txt Îļþ');
Closefile(F); {¹Ø±ÕÎļþ F}
End;
Procedure ReadTxt(FileName:String);
Var
F : Textfile;
str : String;
Begin
AssignFile(F, FileName); {½«ÎļþÃûÓë±äÁ¿ F ¹ØÁª}
Reset(F); {´ò¿ª²¢¶ÁÈ¡Îļþ F }
Readln(F, str);
ShowMessage('ÎļþÓÐ:' +str + 'ÐС£');
Closefile(F); {¹Ø±ÕÎļþ F}
End;
Procedure AppendTxt(Str:String;FileName:String);
Var
F:Textfile;
Begin
AssignFile(F, FileName);
Append(F);
Writeln(F, Str);
Closefile(F);
End;