zoukankan      html  css  js  c++  java
  • 通过InstallShield 还原数据库的DLL

    library DBInstall;

    { Important note about DLL memory management: ShareMem must be the
      first unit in your library's USES clause AND your project's (select
      Project-View Source) USES clause if your DLL exports any procedures or
      functions that pass strings as parameters or function results. This
      applies to all strings passed to and from your DLL--even those that
      are nested in records and classes. ShareMem is the interface unit to
      the BORLNDMM.DLL shared memory manager, which must be deployed along
      with your DLL. To avoid using BORLNDMM.DLL, pass string information
      using PChar or ShortString parameters. }

    uses
      ComServ,
      SysUtils,
      Classes,
      Forms,
      uFrmMain in 'uFrmMain.pas' {FrmMain};

    { Open the MainForm, the entertance of Library}
    function OpenForm():integer; stdcall;
    var
      FrmMain: TFrmMain;
    begin
      FrmMain:=TFrmMain.Create(nil);
      FrmMain.ShowModal();
      result:=0;
      FrmMain.Free;
    end;

    exports
      DllGetClassObject,
      DllCanUnloadNow,
      DllRegisterServer,
      DllUnregisterServer,
      OpenForm;
    {$R *.res}

    begin
    end.

    unit uFrmMain;

    interface

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

    type
      TFrmMain = class(TForm)
        GroupBox1: TGroupBox;
        Label1: TLabel;
        Label2: TLabel;
        txtUserName: TEdit;
        txtPassword: TEdit;
        btnOK: TButton;
        dbConn: TADOConnection;
        ADOQuery1: TADOQuery;
        procedure FormShow(Sender: TObject);
        procedure btnOKClick(Sender: TObject);
      private
        { Private declarations }
      public
        { Public declarations }
      end;

    implementation

    {$R *.dfm}

    procedure TFrmMain.FormShow(Sender: TObject);
    begin
      txtUserName.Text:='sa';
      txtPassword.Text:='';
    end;

    procedure TFrmMain.btnOKClick(Sender: TObject);
    var
      isErrRetry: bool;
    begin
      isErrRetry:=false;
      dbConn.ConnectionString:='Provider=SQLOLEDB.1;'
            +'Password='+Trim(txtPassword.Text)+';Persist Security Info=True;User ;Data Source=localhost';
      try
        dbConn.Open();
        ADOQuery1.SQL.Text:='RESTORE DATABASE MyNwind FROM MyNwind_1';
        ADOQuery1.ExecSQL;
      except on E:Exception do
      begin
        if MessageDlg('存在错误:'+E.Message+'是否忽略',mtError,[mbRetry,mbIgnore],0)=mrRetry then
          isErrRetry:=true
        else
          isErrRetry:=false;
        end;
      end;
      dbConn.Close();

      if not isErrRetry then ModalResult:=mrOK;
    end;

    end.

  • 相关阅读:
    网络编程中 TCP 半开连接和TIME_WAIT 学习
    redis中的小秘密和持久化小细节
    排序
    Es官方文档整理-3.Doc Values和FieldData
    Es官方文档整理-2.分片内部原理
    Elasticsearch doc_value认识
    路边停靠 贴边停车不蹭轮胎的技巧
    mybatis 连接数据库
    putIfAbsent
    Hive与HBase区别 大墨垂杨
  • 原文地址:https://www.cnblogs.com/martian6125/p/9631562.html
Copyright © 2011-2022 走看看