//TStringList 常用方法与属性: var List: TStringList; i: Integer; begin List := TStringList.Create; List.Add('Strings1'); {添加} List.Add('Strings2'); List.Exchange(0,1); {置换} List.Insert(0,'Strings3'); {插入} i := List.IndexOf('Strings1'); {第一次出现的位置} List.Sort; {排序} List.Sorted := True; {指定排序} List.Count; {总数} List.Text; {文本集合} List.Delete(0); {删除, 0是第一个数据} List.LoadFromFile('c:\tmp.txt');{打开} List.SaveToFile('c:\tmp.txt'); {保存} List.Clear; {清空} List.Free; {释放} end;
//读入字符串 var List: TStringList; begin List := TStringList.Create; List.CommaText := 'aaa,bbb,ccc,ddd'; //相当于: List.Text := 'aaa' + #13#10 + 'bbb' + #13#10' + 'ccc' + '#13#10' + 'ddd'; ShowMessage(IntToStr(List.Count)); //4 ShowMessage(List[0]); //aaa List.Free; end;
//置换分隔符 var List: TStringList; begin List := TStringList.Create; List.Delimiter := '|'; List.DelimitedText := 'aaa|bbb|ccc|ddd'; ShowMessage(IntToStr(List.Count)); //4 ShowMessage(List[0]); //aaa List.Free; end;
//类似的哈希表操作法 var List: TStringList; begin List := TStringList.Create; List.Add('aaa=111'); List.Add('bbb=222'); List.Add('ccc=333'); List.Add('ddd=444'); ShowMessage(List.Names[1]); //bbb ShowMessage(List.ValueFromIndex[1]); //222 ShowMessage(List.Values['bbb']); //222 //ValueFromIndex 可以赋值: List.ValueFromIndex[1] := '2'; ShowMessage(List[1]); //bbb=2 //可以通过 Values 赋值: List.Values['bbb'] := '22'; ShowMessage(List[1]); //bbb=22 List.Free; end;
//避免重复值 var List: TStringList; begin List := TStringList.Create; List.Add('aaa'); List.Sorted := True; //需要先指定排序 List.Duplicates := dupIgnore; //如有重复值则放弃 List.Add('aaa'); ShowMessage(List.Text); //aaa //Duplicates 有3个可选值: //dupIgnore: 放弃; //dupAccept: 结束; //dupError: 提示错误. List.Free; end;
//排序与倒排序 {排序函数} function DescCompareStrings(List: TStringList; Index1, Index2: Integer): Integer; begin Result := -AnsiCompareText(List[Index1], List[Index2]); end; procedure TForm1.Button1Click(Sender: TObject); var List: TStringList; begin List := TStringList.Create; List.Add('bbb'); List.Add('ccc'); List.Add('aaa'); //未排序 ShowMessage(List.Text); //bbb ccc aaa //排序 List.Sort; ShowMessage(List.Text); //aaa bbb ccc //倒排序 List.CustomSort(DescCompareStrings); //调用排序函数 ShowMessage(List.Text); //ccc bbb aaa //假如: List.Sorted := True; List.Add('999'); List.Add('000'); List.Add('zzz'); ShowMessage(List.Text); //000 999 aaa bbb ccc zzz end;
转自万一老师:http://www.cnblogs.com/del/archive/2007/12/10/990040.html