在Delphi.net中调用COM/COM+

王朝delphi·作者佚名  2006-01-08
窄屏简体版  字體: |||超大  

客户的系统是C/S和B/S的结合,B/S部分原来计划用IntraWeb,

刚好Delphi.net出现,所以B/S部分改用Delphi.net;

在开发过程中出现了一个问题:加密算法是Delphi 7开发的,

时间太紧不可能用Delphi.net重写加密算法,于是想到COM/COM+,

只可惜Delphi.net资料很少,与COM/COM+互操作的资料就更少了。

于是自己摸索,便有下文(源码附后):

1,在Delphi 7中建立COM/COM+

(1)在IDE中File -> New -> Other -> ActiveX -> ActiveX Library,

将工程文件保存为ComProject;

(2)在IDE中File -> New -> Other -> ActiveX -> COM Object,

在Class Name栏填上Test,该单元保存为Test;

(3)在IDE中View -> Type Library给ITest加一个名为GetMsg的过程;

(4)Ctrl + F9;

(5)在IDE中Run -> Register ActiveX Server; // 注册COM/COM+也可用命令行

2, 在Delphi.net中调用COM/COM+

(1)在IDE中File -> New -> ASP.NET Web Application,

可能会遇到很多麻烦要你自己搞定哦!

(2)添加COM/COM+的引用:

在IDE中Project ->Add Reference -> COM Imports,

选中刚才注册的ComProject,点击Add Reference 添加引用,

单击OK(要注意你的项目文件(ASP.NET Web Application)

的路径(Path)不能使用中文哦);

(3)在WebForm1得uses中添加ComProject;

(4)调用COM/COM+

在WebForm1上方上两个Web Control:一个Button,一个Label;

双击Button,在过程中写上:

var

Msg: string;

Obj: TObject;

begin

Obj := Server.CreateObject('ComProject.Test'); // 建立COM/COM+

Test(Obj).GetMsg(Msg); // 将Obj转换为Test,调用GetMsg方法;

Label1.Text := Msg;

end;

(5)在WebForm1.aspx的Page行中加上Aspcompat="true",

如:<%@ Page language="c#" Debug="true" Codebehind="WebForm1.pas" AutoEventWireup="false" Inherits="WebForm1.TWebForm1" Aspcompat="true"%>

(6)Ctrl + F9,Run ->Run(或者Run Without Debugging);

(7)在网页中点击Button,是不是搞定了!

// 以下为源码部分:

COM/COM+工程文件(ComProject.dpr):

library ComProject;

uses

ComServ,

ComProject_TLB in 'ComProject_TLB.pas',

Test in 'Test.pas' {Test: CoClass};

exports

DllGetClassObject,

DllCanUnloadNow,

DllRegisterServer,

DllUnregisterServer;

{$R *.TLB}

{$R *.RES}

begin

end.

//COM/COM+的Test单元(Test.pas):

unit Test;

{$WARN SYMBOL_PLATFORM OFF}

interface

uses

Windows, ActiveX, Classes, ComObj, ComProject_TLB, StdVcl;

type

TTest = class(TTypedComObject, ITest)

protected

function GetMsg(out Msg: WideString): HResult; stdcall;

{Declare ITest methods here}

end;

implementation

uses ComServ;

function TTest.GetMsg(out Msg: WideString): HResult;

begin

Msg := 'Com/Com+测试成功!';

end;

initialization

TTypedComObjectFactory.Create(ComServer, TTest, Class_Test,

ciMultiInstance, tmApartment);

end.

//COM/COM+的类型库t单元(ComProject_TLB.pas):

unit ComProject_TLB;

// ************************************************************************ //

// WARNING

// -------

// The types declared in this file were generated from data read from a

// Type Library. If this type library is explicitly or indirectly (via

// another type library referring to this type library) re-imported, or the

// 'Refresh' command of the Type Library Editor activated while editing the

// Type Library, the contents of this file will be regenerated and all

// manual modifications will be lost.

// ************************************************************************ //

// PASTLWTR : 1.2

// File generated on 2004-2-6 13:28:46 from Type Library described below.

// ************************************************************************ //

// Type Lib: D:\Program Files\Borland\Delphi7\Projects\comtest2\ComProject.tlb (1)

// LIBID: {92B46A1D-8A31-46C5-98FE-C03FEA98DC21}

// LCID: 0

// Helpfile:

// HelpString: ComProject Library

// DepndLst:

// (1) v2.0 stdole, (D:\WINDOWS\system32\stdole2.tlb)

// ************************************************************************ //

{$TYPEDADDRESS OFF} // Unit must be compiled without type-checked pointers.

{$WARN SYMBOL_PLATFORM OFF}

{$WRITEABLECONST ON}

{$VARPROPSETTER ON}

interface

uses Windows, ActiveX, Classes, Graphics, StdVCL, Variants;

// *********************************************************************//

// GUIDS declared in the TypeLibrary. Following prefixes are used:

// Type Libraries : LIBID_xxxx

// CoClasses : CLASS_xxxx

// DISPInterfaces : DIID_xxxx

// Non-DISP interfaces: IID_xxxx

// *********************************************************************//

const

// TypeLibrary Major and minor versions

ComProjectMajorVersion = 1;

ComProjectMinorVersion = 0;

LIBID_ComProject: TGUID = '{92B46A1D-8A31-46C5-98FE-C03FEA98DC21}';

IID_ITest: TGUID = '{96CECA70-1438-4C54-982E-67C378F085E8}';

CLASS_Test: TGUID = '{CA54722F-C5EF-4814-A8DB-C1C357832F08}';

type

// *********************************************************************//

// Forward declaration of types defined in TypeLibrary

// *********************************************************************//

ITest = interface;

// *********************************************************************//

// Declaration of CoClasses defined in Type Library

// (NOTE: Here we map each CoClass to its Default Interface)

// *********************************************************************//

Test = ITest;

// *********************************************************************//

// Interface: ITest

// Flags: (256) OleAutomation

// GUID: {96CECA70-1438-4C54-982E-67C378F085E8}

// *********************************************************************//

ITest = interface(IUnknown)

['{96CECA70-1438-4C54-982E-67C378F085E8}']

function GetMsg(out Msg: WideString): HResult; stdcall;

end;

// *********************************************************************//

// The Class CoTest provides a Create and CreateRemote method to

// create instances of the default interface ITest exposed by

// the CoClass Test. The functions are intended to be used by

// clients wishing to automate the CoClass objects exposed by the

// server of this typelibrary.

// *********************************************************************//

CoTest = class

class function Create: ITest;

class function CreateRemote(const MachineName: string): ITest;

end;

implementation

uses ComObj;

class function CoTest.Create: ITest;

begin

Result := CreateComObject(CLASS_Test) as ITest;

end;

class function CoTest.CreateRemote(const MachineName: string): ITest;

begin

Result := CreateRemoteComObject(MachineName, CLASS_Test) as ITest;

end;

end.

/////////////////////////////////////以下为Delphi.net调用COM/COM+源码////////////////////////////

//WebForm1.pas单元:

unit WebForm1;

interface

uses

System.Collections, System.ComponentModel,

System.Data, System.Drawing, System.Web, System.Web.SessionState,

System.Web.UI, System.Web.UI.WebControls, System.Web.UI.HtmlControls,

ComProject;

type

TWebForm1 = class(System.Web.UI.Page)

{$REGION 'Designer Managed Code'}

strict private

procedure InitializeComponent;

procedure Button1_Click(sender: System.Object; e: System.EventArgs);

{$ENDREGION}

strict private

procedure Page_Load(sender: System.Object; e: System.EventArgs);

strict protected

Button1: System.Web.UI.WebControls.Button;

Label1: System.Web.UI.WebControls.Label;

procedure OnInit(e: EventArgs); override;

private

{ Private Declarations }

public

{ Public Declarations }

end;

implementation

{$REGION 'Designer Managed Code'}

/// <summary>

/// Required method for Designer support -- do not modify

/// the contents of this method with the code editor.

/// </summary>

procedure TWebForm1.InitializeComponent;

begin

Include(Self.Button1.Click, Self.Button1_Click);

Include(Self.Load, Self.Page_Load);

end;

{$ENDREGION}

procedure TWebForm1.Page_Load(sender: System.Object; e: System.EventArgs);

begin

// TODO: Put user code to initialize the page here

end;

procedure TWebForm1.OnInit(e: EventArgs);

begin

//

// Required for Designer support

//

InitializeComponent;

inherited OnInit(e);

end;

procedure TWebForm1.Button1_Click(sender: System.Object; e: System.EventArgs);

var

Msg: string;

Obj: TObject;

begin

Obj := Server.CreateObject('ComProject.Test');

Test(Obj).GetMsg(Msg);

Label1.Text := Msg;

end;

end.

///WebForm1.aspx单元:

<%@ Page language="c#" Debug="true" Codebehind="WebForm1.pas" AutoEventWireup="false" Inherits="WebForm1.TWebForm1" Aspcompat="true"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>

<head>

<title></title>

<meta name="GENERATOR" content="Borland Package Library 7.1">

</head>

<body ms_positioning="GridLayout">

<form runat="server">

<asp:button id=Button1

style="Z-INDEX: 1; LEFT: 238px; POSITION: absolute; TOP: 158px"

runat="server" text="Button">

</asp:button>

<asp:label id=Label1

style="Z-INDEX: 2; LEFT: 190px; POSITION: absolute; TOP: 54px"

runat="server">Label</asp:label>

</form>

</body>

</html>

 
 
 
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