用Delphi开发报表打印的ASP组件

2019-11-18 18:47:35

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asp在对数据库操作方面提供了很好的内嵌对象。但是，其他方面的功能有所欠缺，如：报表打印。特别是国内的复杂的报表，用ASP很难实现。

不过，ASP支持插件，这就可以根据需要开发ASP插件，笔者用Delphi5.0开发了ASP打印组件。下面笔者将分步来开发一个通用的报表打印的ASP组件。

第一步：新建一个Activex Library,命名为PRintT,然后再新建一个Active Server Object Class，命名为Print，即建立了一个名为Print的ASP组件，文件命名为Unit1.pas。

第二步：打开Type Library，新建一个方法Print1，用于传递报表打印。

第三步：新建一个DataModule，放入Adoconnection组件和AdoTable组件，文件名为Unit2.pas。

第四步：新建一个TQuickRep，设计你要打印的报表，文件名为文件名为Unit23.pas。以下是个文件的详细代码：
{=============Unit1.pas===============}

unit Unit1;

interface

uses
ComObj, ActiveX, AspTlb, PrintT_TLB, StdVcl;

type
TPrint = class(TASPObject, iprint)
protected
    procedure OnEndPage; safecall;
    procedure OnStartPage(const AScriptingContext: IUnknown); safecall;
    procedure Print1; safecall;
end;

implementation

uses ComServ,unit2,unit23;

procedure TPrint.OnEndPage;
begin
inherited OnEndPage;
end;

procedure TPrint.OnStartPage(const AScriptingContext: IUnknown);
begin
inherited OnStartPage(AScriptingContext);
end;

procedure TPrint.Print1;
begin
IdearRpt.Print;
end;

initialization
TAutoObjectFactory.Create(ComServer, TPrint, Class_Print,
ciMultiInstance, tmApartment);
end.

{===============Unit2.pas===============}

unit Unit2;

interface

uses
SysUtils, Windows, Messages, Classes, Graphics, Controls, Forms,
Dialogs, DBTables, DB, ADODB;

type
TCustomerData = class(TDataModule)
    ADOConnection1: TADOConnection;
    ADOTable1: TADOTable;
    DataSource1: TDataSource;
    ADOTable1NIANH: TStringField;
    ADOTable1XUH: TStringField;
    ADOTable1SHENQDW: TStringField;
    ADOTable1SHENQRQ: TDateTimeField;
    ADOTable1FARDB: TStringField;
    ADOTable1FARDH: TStringField;
    ADOTable1LIANXR: TStringField;
    ADOTable1LIANXRDH: TStringField;
    ADOTable1DANWZCDZ: TStringField;
    ADOTable1JIANSXZDM: TStringField;
    ADOTable1JIANSGM: TBCDField;
    ADOTable1ZHIGRS: TBCDField;
    ADOTable1YONGDFH: TBCDField;
    ADOTable1RIYSL: TBCDField;
    ADOTable1RIPSL: TBCDField;
    ADOTable1JIANZSJGD: TBCDField;
    ADOTable1RANQYL: TBCDField;
    ADOTable1YONGDYQ: TStringField;
    ADOTable1RELYL: TBCDField;
    ADOTable1JIANSXM: TStringField;
    ADOTable1PIZWH: TStringField;
    ADOTable1JIANSGM2: TBCDField;
    ADOTable1YONGDXZDM: TStringField;
    ADOTable1YONGDWZ: TStringField;
    ADOTable1DONGL: TStringField;
    ADOTable1XIL: TStringField;
    ADOTable1NANL: TStringField;
    ADOTable1BEIL: TStringField;
    ADOTable1CHANG: TBCDField;
    ADOTable1KUAN: TBCDField;
    ADOTable1ZONGMJ1: TBCDField;
    ADOTable1ZONGMJ2: TBCDField;
    ADOTable1YOUXRQ1: TDateTimeField;
    ADOTable1YOUXRQ2: TDateTimeField;
    ADOTable1BEIZ: TStringField;
    ADOTable1JINGB: TStringField;
    ADOTable1SHENH: TStringField;
    ADOTable1SHEND: TStringField;
    ADOTable1SHENDRQ: TDateTimeField;
    ADOTable1PICTURE: TBlobField;

private
{ Private declarations }
public
{ Public declarations }
end;

var
CustomerData: TCustomerData;

implementation

{$R *.DFM}

end.

{===========Unit23.pas===============}

unit Unit23;

interface

uses Windows, SysUtils, Messages, Classes, Graphics, Controls,
StdCtrls, ExtCtrls, Forms, Quickrpt, QRCtrls;

type
TIdearRpt = class(TQuickRep)
    PageFooterBand1: TQRBand;
    PageHeaderBand1: TQRBand;
    QRLabel1: TQRLabel;
    QRLabel2: TQRLabel;
    QRLabel3: TQRLabel;
    QRDBText15: TQRDBText;
    QRDBText17: TQRDBText;
    QRDBText19: TQRDBText;
    QRDBText13: TQRDBText;
    QRLabel46: TQRLabel;
    QRLabel47: TQRLabel;
    TitleBand1: TQRBand;
    QRShape1: TQRShape;
    QRShape2: TQRShape;
    QRShape3: TQRShape;
    QRShape4: TQRShape;
    QRShape5: TQRShape;
    QRShape6: TQRShape;
    QRLabel4: TQRLabel;
    QRLabel5: TQRLabel;
    QRLabel6: TQRLabel;
    QRShape7: TQRShape;
    QRShape8: TQRShape;
    QRLabel7: TQRLabel;
    QRLabel8: TQRLabel;
    QRLabel11: TQRLabel;
    QRLabel12: TQRLabel;
    QRDBText1: TQRDBText;
    QRDBText2: TQRDBText;
    QRDBText4: TQRDBText;
    QRDBText6: TQRDBText;
    QRDBText3: TQRDBText;
    QRShape9: TQRShape;
    QRLabel9: TQRLabel;
    QRDBText5: TQRDBText;
    QRShape17: TQRShape;
    QRShape22: TQRShape;
    QRShape23: TQRShape;
    QRShape24: TQRShape;
    QRShape25: TQRShape;
    QRShape26: TQRShape;
    QRShape27: TQRShape;
    QRShape10: TQRShape;
    QRShape11: TQRShape;
    QRShape12: TQRShape;
    QRShape13: TQRShape;
    QRShape18: TQRShape;
    QRShape19: TQRShape;
    QRLabel10: TQRLabel;
    QRLabel13: TQRLabel;
    QRLabel14: TQRLabel;
    QRLabel15: TQRLabel;
    QRLabel16: TQRLabel;
    QRLabel17: TQRLabel;
    QRLabel18: TQRLabel;
    QRLabel19: TQRLabel;
    QRLabel20: TQRLabel;
    QRLabel21: TQRLabel;
    QRLabel22: TQRLabel;
    QRLabel23: TQRLabel;
    QRLabel24: TQRLabel;
    QRLabel32: TQRLabel;
    QRLabel33: TQRLabel;
    QRLabel34: TQRLabel;
    QRLabel35: TQRLabel;
    QRLabel36: TQRLabel;
    QRShape20: TQRShape;
    QRLabel37: TQRLabel;
    QRLabel38: TQRLabel;
    QRLabel41: TQRLabel;
    QRLabel42: TQRLabel;
    QRLabel43: TQRLabel;
    QRLabel44: TQRLabel;
    QRLabel45: TQRLabel;
    QRLabel48: TQRLabel;
    QRLabel49: TQRLabel;
    QRLabel50: TQRLabel;
    QRLabel51: TQRLabel;
    QRLabel52: TQRLabel;
    QRLabel53: TQRLabel;
    QRLabel54: TQRLabel;
    QRLabel55: TQRLabel;
    QRLabel56: TQRLabel;
    QRLabel57: TQRLabel;
    QRLabel58: TQRLabel;
    QRLabel59: TQRLabel;
    QRLabel60: TQRLabel;
    QRLabel61: TQRLabel;
    QRShape28: TQRShape;
    QRLabel62: TQRLabel;
    QRLabel63: TQRLabel;
    QRDBText7: TQRDBText;
    QRDBText8: TQRDBText;
    QRDBText9: TQRDBText;
    QRDBText10: TQRDBText;
    QRDBText11: TQRDBText;
    QRDBText12: TQRDBText;
    QRDBText14: TQRDBText;
    QRDBText16: TQRDBText;
    QRDBText18: TQRDBText;
    QRDBText20: TQRDBText;
    QRDBText21: TQRDBText;
    QRDBText22: TQRDBText;
    QRDBText23: TQRDBText;
    QRDBText24: TQRDBText;
    QRDBText25: TQRDBText;
    QRDBText26: TQRDBText;
    QRDBText27: TQRDBText;
    QRDBText28: TQRDBText;
    QRDBText29: TQRDBText;
    QRDBText30: TQRDBText;
    QRDBText31: TQRDBText;
    QRDBText32: TQRDBText;
    QRDBText33: TQRDBText;
    QRDBText34: TQRDBText;
    QRDBText35: TQRDBText;
    QRMemo4: TQRMemo;
    QRDBText36: TQRDBText;
    QRDBText37: TQRDBText;
    QRDBText38: TQRDBText;
private

public

end;

var
IdearRpt: TIdearRpt;

implementation
uses unit2;
{$R *.DFM}

end.

{=========PrintT.dpr============}

library PrintT;

{%File 'Print.asp'}

uses
ComServ,
PrintT_TLB in 'PrintT_TLB.pas',
Unit1 in 'Unit1.pas' {Print: CoClass},
Unit2 in 'Unit2.pas' {CustomerData: TDataModule},
Unit23 in 'Unit23.pas' {IdearRpt: TQuickRep};

exports
DllGetClassObject,
DllCanUnloadNow,
DllRegisterServer,
DllUnregisterServer;

{$R *.TLB}

{$R *.RES}

begin
IdearRpt := TIdearRPt.Create(NiL);{必不可少}
end.

第五步：编译并注册PrintT组件，即可在ASP代码中调用，调用示例如下：

<% Set DelphiASPObj = Server.CreateObject("PrintT.Print")
DelphiASPObj.Print1

通过以上步骤，我们就顺利地利用Delphi开发出了具有报表功能的ASP组件了。当然，笔者只是介绍了一个简单的思路，希望能起到抛砖引玉之功效。

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