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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