Dushengjun — Wed, 20 Sep 2006 14:00:00 GMT

在��用windows�pȝ��Ӟ��我们�?x��)发玎ͼ�一�U�类型的文�g��L��可以用指定的应用�E�序打开�Q�如:doc文�g�Q�双��d��以打开文�g�Q�在使用delphi开发应用程序时�Q�同样需要实��C��边的功能�Q�其核心?y��u)��p��取系�l�当前的文�g�Q�而ParamStr函数起到了非帔R��要的作用�Q�先面我们简单用 Delphi开发以个应用程序来说明问题:
首先�Q�用 delphi新徏立一个工�E?然后分别创徏�H�体MainFrm,MyMDIChildForm,��d��相应的控�?如下�?/p>

                                           MainFrm


                                          MyMDIChildForm

代码如下:
Unit1.pas(对应于MainFrm�H�体)
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Menus,Unit2, ComCtrls;

type
TMainFrm = class(TForm)
    MainMenu1: TMainMenu;
    ItemNew: TMenuItem;
    N1: TMenuItem;
    N2: TMenuItem;
    N3: TMenuItem;
    OpenDialog1: TOpenDialog;
    StatusBar1: TStatusBar;
    procedure ItemNewClick(Sender: TObject);
    procedure N3Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
    function CreateMDI():TMyMDIChildForm;
private
    { Private declarations }
public
    { Public declarations }
end;

var
MainFrm: TMainFrm;

implementation

{$R *.dfm}

procedure TMainFrm.ItemNewClick(Sender: TObject);
var
child: TMyMDIChildForm;
begin
child:= TMyMDIChildForm.create(Self);
end;

procedure TMainFrm.N3Click(Sender: TObject);

begin
if opendialog1.Execute then
begin

      CreateMDI.RichEdit1.Lines.LoadFromFile(opendialog1.FileName);
      Self.StatusBar1.Panels[1].Text:=opendialog1.FileName;
   end;

end;

procedure TMainFrm.FormShow(Sender: TObject);
var
FileName:String;
begin
   FileName:=ParamStr(1);
   if FileExists(FileName) then
    begin
      CreateMDI.RichEdit1.Lines.LoadFromFile(FileName);
    end;
end;

function TMainFrm.CreateMDI: TMyMDIChildForm;
var
child: TMyMDIChildForm;
begin
child:= TMyMDIChildForm.create(Self);
Result:=child;
end;

end.
unit2.pas(对应于MyMDIChildForm�H�体)
unit Unit2;

interface

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

type
TMyMDIChildForm = class(TForm)
    RichEdit1: TRichEdit;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
    { Private declarations }
public
    { Public declarations }
end;

var
MyMDIChildForm: TMyMDIChildForm;

implementation

{$R *.dfm}

procedure TMyMDIChildForm.FormClose(Sender: TObject;
var Action: TCloseAction);
begin
Action:=caFree;
end;

end.
�q�样我们实现了一个简单的��C��本程�?�q�行�l�果如下�?

然后,我们��工�E�保�?�q�生成最�l�的EXE文�g,然后我们在Windows�pȝ��目录��L��创徏一个文�?
如下图ResumeAction.java文�g



然后��它的打开方式讄��成我们自��q��可执行程�?br />

然后再双�?y��n)L��文�g,�E�序正确�q�行,�q�将它打开�?


�E�序的核心就�?font color="#ff0000">paramStr函数,它获得了�pȝ��接口,得到了当前的文�g名称!

点击下蝲

Dushengjun 2006-09-20 22:00 发表评论

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