Delphi - 创建SuperDll 持续更新 - Powered by Discuz! Archiver

萝吉萝 發表於 2019-9-5 08:40:00

Delphi - 创建SuperDll 持续更新

Delphi SuperDll
作为一名5年的Delpher，一直认为Delphi是桌面应用的王者，我相信其他的Delpher也这么认为。
但是，慢慢的我发现普通方式的Delphi开发会造成代码的严重臃肿，特别是MDI类大型项目、多人同时开发的情况下。
举个例子，一个Delphi常用的业务逻辑，数据导出到Excel，完全可以写成一个公用的模块放置在业务单元，子窗体用到时直接调用即可，但是一般情况下，事情并不止想象的那么简单，维护人员的思想真的一言难尽。
后来，我有了将Delphi中常用的业务逻辑功能封装成DLL的想法，所有的业务逻辑只能在DLL中实现，系统中不允许直接写业务逻辑，只能调用DLL。
这么做的好处是，相同的业务功能不会被重复开发，大大减少了代码的臃肿，同时，业务逻辑开发人员和前台开发人员独立开来，提高了开发效率。
这里就是SuperDLL的由来，后续将持续更新。
请看如下代码：
更新日志：
//初始化
//邮件发送
//FTP上传、下载
//cxGrid数据导出
<div class="cnblogs_code">
<pre>1 library SuperDll;
2
3 { Important note about DLL memory management: ShareMem must be the
4 first unit in your library's USES clause AND your project's (select
5 Project-View Source) USES clause if your DLL exports any procedures or
6 functions that pass strings as parameters or function results. This
7 applies to all strings passed to and from your DLL--even those that
8 are nested in records and classes. ShareMem is the interface unit to
9 the BORLNDMM.DLL shared memory manager, which must be deployed along
 10 with your DLL. To avoid using BORLNDMM.DLL, pass string information
 11 using PChar or ShortString parameters. }
 12
 13 uses
 14 SysUtils, Classes, Variants, Graphics, Controls, IdBaseComponent, IdComponent, IdFTP,
 15 IdFTPCommon, IdTCPConnection, IdTCPClient, IdMessage, IdMessageClient, IdSMTP, cxGrid,
 16 cxGridExportLink, ComObj,
 17 cxCustomData, cxGraphics,
 18 cxData, cxDataStorage, cxEdit, cxDBData, cxGridLevel,
 19 cxClasses, cxControls, cxGridCustomView, cxGridCustomTableView,
 20 cxGridTableView, cxGridDBTableView;
 21
 22 {$R *.res}
 23
 24 function SuperDll_Init: Boolean; stdcall;
 25 begin
 26 Result := True;
 27 end;
 28
 29 function SuperDll_Ftp_PutOrGet(vType: string; var vUserName: string; var vPassWord: string; var vHost: string; var vDir: string; var vDesFilePath: string; vSouFilePath: string): Boolean; stdcall; //2: FTP文件上传下载
 30 var
 31 IdFtp: TIdFTP;
 32 begin
 33 IdFtp := TIdFTP.Create(nil);
 34 Result := False;
 35 try
 36 with IdFtp do
 37 begin
 38 if Connected then Disconnect;
 39 Username := vUserName;
 40 Password := vPassWord;
 41 Host := vHost;
 42 Port := 21;
 43 Connect;
 44 ChangeDir(vDir);
 45 TransferType := ftBinary;
 46 if vType = 'Put' then
 47 begin
 48 Put(vSouFilePath, ExtractFileName(vSouFilePath));
 49 end
 50 else if vType = 'Get' then
 51 begin
 52 Get(ExtractFileName(vDesFilePath), vDesFilePath, True);
 53 end;
 54 end;
 55 finally
 56 IdFtp.Disconnect;
 57 IdFtp.Free;
 58 Result := True;
 59 end;
 60 end;
 61
 62 function SuperDll_EMail_Send(vSubject: string; var vFrom: string; var vRecipients: string; var vCCList: string; var vBccList: string; var vBody: string; var vAttachment: string; var vUsername: string; var vPassword: string; var vHost: string): Boolean; stdcall;
 63 var
 64 IdSMTP: TIdSMTP;
 65 IdMessage: TIdMessage;
 66 begin
 67 Result := False;
 68 IdSMTP := TIdSMTP.Create(nil);
 69 IdMessage := TIdMessage.Create(nil);
 70 try
 71 with IdMessage do
 72 begin
 73 Clear;
 74 Subject := vSubject;
 75 From.Text := vFrom;
 76 Recipients.EMailAddresses := vRecipients;
 77 CCList.EMailAddresses := vCCList;
 78 BccList.EMailAddresses := vBccList;
 79 Priority := TIdMessagePriority(4);
 80 if Trim(vAttachment) <> '' then
 81 begin
 82 TIdAttachment.Create(MessageParts, Trim(vAttachment));
 83 end;
 84 vBody := vBody + #13#10;
 85 vBody := vBody + #13#10;
 86 vBody := vBody + #13#10;
 87 vBody := vBody + #13#10;
 88 vBody := vBody + 'It is Auto Mail System,please do not reply this mail directly,thank you!';
 89 Body.Add(vBody);
 90 end;
 91
 92 with IdSMTP do
 93 begin
 94 if Connected then Disconnect;
 95 AuthenticationType := atLogin;
 96 Port := 25;
 97 UserName := vUsername;
 98 Password := vPassword;
 99 Host := vHost;
100 Connect;
101 end;
102
103 IdSMTP.Send(IdMessage);
104 IdSMTP.Disconnect;
105
106 Result := True;
107 finally
108 IdSMTP.Free;
109 IdMessage.Free;
110 end;
111 end;
112
113 function SaveCxGridToExcel(vCxGrid: TcxGrid; var vFullPathName: string): Boolean; stdcall;
114 begin
115 Result := False;
116 vCxGrid := TcxGrid.Create(nil);
117 ExportGridToExcel(vFullPathName, vCxGrid);
118 vCxGrid.Free;
119 Result := True;
120 end;
121
122 function SaveCxGridToCSV(vCxGrid: TcxGrid; var vFullPathName: string): Boolean; stdcall;
123 begin
124 Result := False;
125
126 ExportGridToText(vFullPathName + '.XLS', vCxGrid, True, True, ',', '', '', 'CSV');
127 Result := True; ;
128 end;
129
130 exports
131 SuperDll_Init,
132 SuperDll_Ftp_PutOrGet,
133 SuperDll_EMail_Send,
134 SaveCxGridToExcel,
135 SaveCxGridToCSV;
136
137 begin
138 end.</pre>
</div>
 
<div id="AllanboltSignature">
<p id="PSignature" style="padding: 10px 10px 10px 60px; background: url("https://images.cnblogs.com/cnblogs_com/jeremywucnblog/1607637/o_191206011825obs.png") 1% no-repeat rgba(229, 241, 244, 1); font-family: 微软雅黑; font-size: 11px; border: 1px dashed rgba(224, 224, 224, 1)">  作者：Jeremy.Wu   出处：https://www.cnblogs.com/jeremywucnblog/
   本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
 

</div> 
来源：https://www.cnblogs.com/jeremywucnblog/p/11462839.html

頁: [1]

琼殿技术论坛's Archiver

Delphi - 创建SuperDll 持续更新