ini 文件操作记要(1): 使用 TIniFile

转自：http://www.cnblogs.com/del/archive/2007/12/17/1003755.html

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    Button7: TButton;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses IniFiles;  {uses 包含 TIniFile 的单元}

var
  ini: TIniFile;
  path: string;         {ini 文件路径}
  Section,Key: string;  {分别表示 ini 文件的小节与关键字}

{
  ini文件结构:
  ;注释
  [小节名]
  关键字=值

  INI文件支持: string、integer、boolean、Date、Time、DateTime、Double 与二进制类型
  string 值没有引号
  boolean 的真假用 1、0 表示
}

procedure TForm1.FormCreate(Sender: TObject);
begin
  path := ChangeFileExt(ParamStr(0),'.ini');
  ini := TIniFile.Create(path);  {ini 对象建立需要文件路径参数, 如果缺少路径会默认Windows目录}
end;

//写入 ini 文件:
procedure TForm1.Button1Click(Sender: TObject);
begin
  Section := 'AAA';
  Key := 'AString';
  ini.WriteString(Section,Key,'AAA-String');

  Key := 'AInteger';
  ini.WriteInteger(Section,Key,111);

  Key := 'ABoolean';
  ini.WriteBool(Section,Key,True);

  Key := 'ADate';
  ini.WriteDate(Section,Key,Now);

  Key := 'ATime';
  ini.WriteTime(Section,Key,Now);

  Key := 'ADateTime';
  ini.WriteDateTime(Section,Key,Now);

  Key := 'ADouble';
  ini.WriteFloat(Section,Key,Pi);


  Section := 'BBB';
  Key := 'BString';
  ini.WriteString(Section,Key,'BBB-String');

  Key := 'BInteger';
  ini.WriteInteger(Section,Key,222);

  Key := 'BBoolean';
  ini.WriteBool(Section,Key,True);

  Key := 'BDate';
  ini.WriteDate(Section,Key,Now);

  Key := 'BTime';
  ini.WriteTime(Section,Key,Now);

  Key := 'BDateTime';
  ini.WriteDateTime(Section,Key,Now);

  Key := 'BDouble';
  ini.WriteFloat(Section,Key,Pi);


  Section := 'CCC';
  Key := 'CString';
  ini.WriteString(Section,Key,'CCC-String');

  Key := 'CInteger';
  ini.WriteInteger(Section,Key,333);

  Key := 'CBoolean';
  ini.WriteBool(Section,Key,False);

  Key := 'CDate';
  ini.WriteDate(Section,Key,Now);

  Key := 'CTime';
  ini.WriteTime(Section,Key,Now);

  Key := 'CDateTime';
  ini.WriteDateTime(Section,Key,Now);

  Key := 'CDouble';
  ini.WriteFloat(Section,Key,Pi);

{写入结果:
  [AAA]
  AString=AAA-String
  AInteger=111
  ABoolean=1
  ADate=2007-12-17
  ATime=22:06:23
  ADateTime=2007-12-17 22:06:23
  ADouble=3.14159265358979
  [BBB]
  BString=BBB-String
  BInteger=222
  BBoolean=1
  BDate=2007-12-17
  BTime=22:06:23
  BDateTime=2007-12-17 22:06:23
  BDouble=3.14159265358979
  [CCC]
  CString=CCC-String
  CInteger=333
  CBoolean=0
  CDate=2007-12-17
  CTime=22:06:23
  CDateTime=2007-12-17 22:06:23
  CDouble=3.14159265358979
}
end;

//读取 ini 文件:
procedure TForm1.Button2Click(Sender: TObject);
var
  s: string;
  i: Integer;
  b: Boolean;
  f: Double;
  d: TDate;
  t: TTime;
  dt: TDateTime;
begin
  s := ini.ReadString('BBB','BString','');  {最后一个参数是默认值}
  i := ini.ReadInteger('BBB','BInteger',0);
  b := ini.ReadBool('BBB','BBoolean',False);
  f := ini.ReadFloat('BBB','BDouble',0);
  d := ini.ReadDate('BBB','BDate',Now);
  t := ini.ReadTime('BBB','BTime',Now);
  dt := ini.ReadDateTime('BBB','BDateTime',Now);

  ShowMessage(s);                 {BBB-String}
  ShowMessage(IntToStr(i));       {222}
  ShowMessage(BoolToStr(b));      {-1(True)}
  ShowMessage(FloatToStr(f));     {3.14159265358979}
  ShowMessage(DateToStr(d));      {2007-12-17}
  ShowMessage(TimeToStr(t));      {22:06:23}
  ShowMessage(DateTimeToStr(dt)); {2007-12-17 22:06:23}
end;

//读入所有小节名到 TStrings:
procedure TForm1.Button3Click(Sender: TObject);
var
  List: TStrings;
begin
  List := TStringList.Create;
  ini.ReadSections(List);
  ShowMessage(List.Text);
  {
    AAA
    BBB
    CCC
  }
  List.Free;
end;

//读入指定小节的所有关键字到 TStrings:
procedure TForm1.Button4Click(Sender: TObject);
var
  List: TStrings;
begin
  List := TStringList.Create;
  ini.ReadSection('AAA',List);
  ShowMessage(List.Text);
  {
    AString
    AInteger
    ABoolean
    ADate
    ATime
    ADateTime
    ADouble
  }
  List.Free;
end;

//读入指定小节的所有关键字与值到 TStrings:
procedure TForm1.Button5Click(Sender: TObject);
var
  List: TStrings;
begin
  List := TStringList.Create;
  ini.ReadSectionValues('BBB',List);
  ShowMessage(List.Text);
  {
    BString=BBB-String
    BInteger=222
    BBoolean=1
    BDate=2007-12-17
    BTime=22:06:23
    BDateTime=2007-12-17 22:06:23
    BDouble=3.14159265358979
  }
  List.Free;
end;

//删除与添加
procedure TForm1.Button6Click(Sender: TObject);
begin
  ini.DeleteKey('BBB','BString');  {删除关键字}
  ini.EraseSection('CCC');         {删除小节}
//  ini.UpdateFile;                {保存到文件}

{添加小节与关键字或修改值, 直接写入即可}
end;

//其他功能
procedure TForm1.Button7Click(Sender: TObject);
var
  b: Boolean;
  s: string;
begin
  b := ini.SectionExists('DDD');         {判断某个小节是否存在}
  b := ini.ValueExists('AAA','AString'); {判断某个关键字的值是否存在}
  s := ini.FileName;                     {获取文件名}
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  ini.Free;
end;

end.