DELPHI基础开发技巧
◇[DELPHI]网络邻居复制文件 uses shellapi; copyfile(pchar('newfile.txt'),pchar('//computername/direction/targer.txt'),false); ◇[DELPHI]产生鼠标拖动效果 通过MouseMove事件、DragOver事件、EndDrag事件实现，例如在PANEL上的LABEL： var xpanel,ypanel,xlabel,ylabel:integer; PANEL的MouseMove事件：xpanel:=x;ypanel:=y; PANEL的DragOver事件：xpanel:=x;ypanel:=y; LABEL的MouseMove事件：xlabel:=x;ylabel:=y; LABEL的EndDrag事件：label.left:=xpanel-xlabel;label.top:=ypanel-ylabel; ◇[DELPHI]取得WINDOWS目录 uses shellapi; var windir:array[0..255] of char; getwindowsdirectory(windir,sizeof(windir)); 或者从注册表中读取，位置： HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion SystemRoot键，取得如：C:\WINDOWS ◇[DELPHI]在FORM或其他容器上画线 var x,y:array [0..50] of integer; canvas.pen.color:=clred; canvas.pen.style:=psDash; form1.canvas.moveto(trunc(x[i]),trunc(y[i])); form1.canvas.lineto(trunc(x[j]),trunc(y[j])); ◇[DELPHI]字符串列表使用 var tips:tstringlist; tips:=tstringlist.create; tips.loadfromfile('filename.txt'); edit1.text:=tips[0]; tips.add('last line addition string'); tips.insert(1,'insert string at NO 2 line'); tips.savetofile('newfile.txt'); tips.free; ◇[DELPHI]简单的剪贴板操作 richedit1.selectall; richedit1.copytoclipboard; richedit1.cuttoclipboard; edit1.pastefromclipboard; ◇[DELPHI]关于文件、目录操作 Chdir('c:\abcdir');转到目录 Mkdir('dirname');建立目录 Rmdir('dirname');删除目录 GetCurrentDir;//取当前目录名，无'\' Getdir(0,s);//取工作目录名s:='c:\abcdir'; Deletfile('abc.txt');//删除文件 Renamefile('old.txt','new.txt');//文件更名 ExtractFilename(filelistbox1.filename);//取文件名 ExtractFileExt(filelistbox1.filename);//取文件后缀 ◇[DELPHI]处理文件属性 attr:=filegetattr(filelistbox1.filename); if (attr and faReadonly)=faReadonly then ... //只读 if (attr and faSysfile)=faSysfile then ... //系统 if (attr and faArchive)=faArchive then ... //存档 if (attr and faHidden)=faHidden then ... //隐藏 ◇[DELPHI]执行程序外文件 WINEXEC//调用可执行文件 winexec('command.com /c copy *.* c:\',SW_Normal); winexec('start abc.txt'); ShellExecute或ShellExecuteEx//启动文件关联程序 function executefile(const filename,params,defaultDir:string;showCmd:integer):THandle; ExecuteFile('C:\abc\a.txt','x.abc','c:\abc\',0); ExecuteFile('http://tingweb.yeah.net','','',0); ExecuteFile('mailto:tingweb@wx88.net','','',0); ◇[DELPHI]取得系统运行的进程名 var hCurrentWindow:HWnd;szText:array[0..254] of char; begin hCurrentWindow:=Getwindow(handle,GW_HWndFrist); while hCurrentWindow <> 0 do begin if Getwindowtext(hcurrnetwindow,@sztext,255)>0 then listbox1.items.add(strpas(@sztext)); hCurrentWindow:=Getwindow(hCurrentwindow,GW_HWndNext); end; end; ◇[DELPHI]关于汇编的嵌入 Asm End; 可以任意修改EAX、ECX、EDX；不能修改ESI、EDI、ESP、EBP、EBX。 ◇[DELPHI]关于类型转换函数 FloatToStr//浮点转字符串 FloatToStrF//带格式的浮点转字符串 IntToHex//整数转16进制 TimeToStr DateToStr DateTimeToStr FmtStr//按指定格式输出字符串 FormatDateTime('YYYY-MM-DD,hh-mm-ss',DATE); ◇[DELPHI]字符串的过程和函数 Insert(obj,target,pos);//字符串target插入在pos的位置。如插入结果大于target最大长度，多出字符将被截掉。如Pos在255以外，会产生运行错。例如，st:='Brian'，则Insert（'OK',st,2）会使st变为'BrOKian'。 Delete(st,pos,Num);//从st串中的pos（整型）位置开始删去个数为Num（整型）个字符的子字串。例如，st:='Brian'，则Delete(st,3,2)将变为Brn。 Str(value,st);//将数值value（整型或实型）转换成字符串放在st中。例如，a=2.5E4时，则str(a:10,st)将使st的值为' 25000'。 Val(st,var,code);//把字符串表达式st转换为对应整型或实型数值，存放在var中。St必须是一个表示数值的字符串，并符合数值常数的规则。在转换过程中，如果没有检测出错误，变量code置为0，否则置为第一个出错字符的位置。例如，st:=25.4E3,x是一个实型变量，则val(st,x,code)将使X值为25400，code值为0。 Copy(st.pos.num);//返回st串中一个位置pos（整型）处开始的，含有num（整型）个字符的子串。如果pos大于st字符串的长度，那就会返回一个空串，如果pos在255以外，会引起运行错误。例如，st:='Brian'，则Copy(st,2,2)返回'ri'。 Concat(st1,st2,st3……,stn);//把所有自变量表示出的字符串按所给出的顺序连接起来，并返回连接后的值。如果结果的长度255，将产生运行错误。例如，st1:='Brian',st2:=' ',st3:='Wilfred'，则Concat(st1,st2,st3)返回'Brian Wilfred'。 Length(st);//返回字符串表达式st的长度。例如，st:='Brian'，则Length(st)返回值为5。 Pos(obj,target);//返回字符串obj在目标字符串target的第一次出现的位置，如果target没有匹配的串，Pos函数的返回值为0。例如，target:='Brian Wilfred'，则Pos('Wil',target)的返回值是7，Pos('hurbet',target)的返回值是0。 ◇[DELPHI]关于处理注册表 uses Registry; var reg:Tregistry; reg:=Tregistry.create; reg.rootkey:='HKey_Current_User'; reg.openkey('Control Panel\Desktop',false); reg.WriteString('Title Wallpaper','0'); reg.writeString('Wallpaper',filelistbox1.filename); reg.closereg; reg.free; ◇[DELPHI]关于键盘常量名 VK_BACK/VK_TAB/VK_RETURN/VK_SHIFT/VK_CONTROL/VK_MENU/VK_PAUSE/VK_ESCAPE /VK_SPACE/VK_LEFT/VK_RIGHT/VK_UP/VK_DOWN F1--F12：$70(112)--$7B(123) A-Z：$41(65)--$5A(90) 0-9：$30(48)--$39(57) ◇[DELPHI]初步判断程序母语 DELPHI软件的DOS提示：This Program Must Be Run Under Win32. VC++软件的DOS提示：This Program Cannot Be Run In DOS Mode. ◇[DELPHI]操作Cookie response.cookies("name").domain:='http://www.086net.com'; with response.cookies.add do begin name:='username'; value:='username'; end ◇[DELPHI]增加到文档菜单连接 uses shellapi,shlOBJ; shAddToRecentDocs(shArd_path,pchar(filepath));//增加连接 shAddToRecentDocs(shArd_path,nil);//清空 ◇[杂类]备份智能ABC输入法词库 windows\system\user.rem windows\system\tmmr.rem ◇[DELPHI]判断鼠标按键 if GetAsyncKeyState(VK_LButton)<>0 then ... //左键 if GetAsyncKeyState(VK_MButton)<>0 then ... //中键 if GetAsyncKeyState(VK_RButton)<>0 then ... //右键 ◇[DELPHI]设置窗体的最大显示 onFormCreate事件 self.width:=screen.width; self.height:=screen.height; ◇[DELPHI]按键接受消息 OnCreate事件中处理：Application.OnMessage:=MyOnMessage; procedure TForm1.MyOnMessage(var MSG:TMSG;var Handle:Boolean); begin if msg.message=256 then ... //ANY键 if msg.message=112 then ... //F1 if msg.message=113 then ... //F2 end; ◇[杂类]隐藏共享文件夹 共享效果：可访问，但不可见（在资源管理、网络邻居中） 取共享名为：direction$ 访问：//computer/dirction/ ◇[Java Script]Java Script网页常用效果 网页60秒定时关闭 <script language="java script"><!-- settimeout('window.close();',60000) --></script> 关闭窗口 <a href="/" onclick="javascript:window.close();return false;">关闭</a> 定时转URL <meta http-equiv="refresh" content="40;url=http://www.086net.com"> 设为首页 <a onclick="this.style.behavior='url(#default#homepage)';this.sethomepage('http://086net.com');"href="#">设为首页</a> 收藏本站 <a href="javascript:window.external.addfavorite('http://086net.com','[未名码头]')">收藏本站</a> 加入频道 <a href="javascript:window.external.addchannel('http://086net.com')">加入频道</a> ◇[DELPHI]文本编辑相关 checkbox1.checked:=not checkbox1.checked; if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsBold] else richedit1.font.style:=richedit1.font.style-[fsBold]//粗体 if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsItalic] else richedit1.font.style:=richedit1.font.style-[fsItalic]//斜体 if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsUnderline] else richedit1.font.style:=richedit1.font.style-[fsUnderline]//下划线 memo1.alignment:=taLeftJustify;//居左 memo1.alignment:=taRightJustify;//居右 memo1.alignment:=taCenter;//居中 ◇[DELPHI]随机产生文本色 randomize;//随机种子 memo1.font.color:=rgb(random(255),random(255),random(255)); ◇[DELPHI]DELPHI5 UPDATE升级补丁序列号 1000003185 90X25fx0 ◇[DELPHI]文件名的非法字符过滤 for i:=1 to length(s) do if s[i] in ['\','/',':','*','?','<','>','|'] then ◇[DELPHI]转换函数的定义及说明 datetimetofiledate (datetime:Tdatetime):longint; 将Tdatetime格式的日期时间值转换成DOS格式的日期时间值 datetimetostr (datetime:Tdatetime):string; 将Tdatatime格式变量转换成字符串，如果datetime参数不包含日期值，返回字符串日期显示成为00/00/00，如果datetime参数中没有时间值，返回字符串中的时间部分显示成为00：00：00 AM datetimetostring (var result string; const format:string; datetime:Tdatetime); 根据给定的格式字符串转换时间和日期值，result为结果字符串，format为转换格式字符串，datetime为日期时间值 datetostr (date:Tdatetime) 使用shortdateformat全局变量定义的格式字符串将date参数转换成对应的字符串 floattodecimal (var result:Tfloatrec;value: extended;precision,decimals: integer); 将浮点数转换成十进制表示 floattostr (value:extended):string 将浮点数value转换成字符串格式，该转换使用普通数字格式，转换的有效位数为15位。 floattotext (buffer:pchar;value:extended; format:Tfloatformat;precision, digits:integer):integer; 用给定的格式、精度和小数将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数，buffer是非0结果的字符串缓冲区。 floattotextfmt (buffer:pchar;value:extended; format:pchar):integer 用给定的格式将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数。 inttohex (value:longint;digits:integer): string; 将给定的数值value转换成十六进制的字符串。参数digits给出转换结果字符串包含的数字位数。 inttostr (value:longint):string 将整数转换成十进制形式字符串 strtodate (const S:string):Tdatetime 将字符串转换成日期值，S必须包含一个合法的格式日期的字符串。 strtodatetime (const S:string):Tdatetime 将字符串S转换成日期时间格式，S必须具有MM/DD/YY HH：MM：SS[AM|PM]格式，其中日期和时间分隔符与系统时期时间常量设置相关。如果没有指定AM或PM信息，表示使用24小时制。 strtofloat (const S:string):extended; 将给定的字符串转换成浮点数，字符串具有如下格式： [+|-]nnn…[.]nnn…[<+|-><E|e><+|->nnnn] strtoint (const S:string):longint 将数字字符串转换成整数，字符串可以是十进制或十六进制格式，如果字符串不是一个合法的数字字符串，系统发生ECONVERTERROR异常 strtointdef (const S:string;default: longint):longint; 将字符串S转换成数字，如果不能将S转换成数字，strtointdef函数返回参数default的值。 strtotime (const S:string):Tdatetime 将字符串S转换成TDATETIME值，S具有HH：MM：SS[AM|PM]格式，实际的格式与系统的时间相关的全局变量有关。 timetostr (time:Tdatetime):string; 将参数TIME转换成字符串。转换结果字符串的格式与系统的时间相关常量的设置有关。 ◇[DELPHI]程序不出现在ALT+CTRL+DEL 在implementation后添加声明: function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer; stdcall; external 'KERNEL32.DLL'; RegisterServiceProcess(GetCurrentProcessID, 1);//隐藏 RegisterServiceProcess(GetCurrentProcessID, 0);//显示 用ALT+DEL+CTRL看不见 ◇[DELPHI]程序不出现在任务栏 uses windows var ExtendedStyle : Integer; begin Application.Initialize; //============================================================== ExtendedStyle := GetWindowLong (Application.Handle, GWL_EXSTYLE); SetWindowLong(Application.Handle, GWL_EXSTYLE, ExtendedStyle OR WS_EX_TOOLWINDOW AND NOT WS_EX_APPWINDOW); //=============================================================== Application.CreateForm(TForm1, Form1); Application.Run; end. ◇[DELPHI]如何判断拨号网络是开还是关 if GetSystemMetrics(SM_NETWORK) AND $01 = $01 then showmessage('在线!') else showmessage('不在线!'); ◇[DELPHI]实现IP到域名的转换 function GetDomainName(Ip:string):string; var pH:PHostent; data:twsadata; ii:dword; begin WSAStartup($101, Data); ii:=inet_addr(pchar(ip)); pH:=gethostbyaddr(@ii,sizeof(ii),PF_INET); if (ph<>nil) then result:=pH.h_name else result:=''; WSACleanup; end; ◇[DELPHI]处理“右键菜单”方法 var reg: TRegistry; begin reg := TRegistry.Create; reg.RootKey:=HKEY_CLASSES_ROOT; reg.OpenKey('*\shell\check\command', true); reg.WriteString('', '"' + application.ExeName + '" "%1"'); reg.CloseKey; reg.OpenKey('*\shell\diary', false); reg.WriteString('', '操作(&C)'); reg.CloseKey; reg.Free; showmessage('DONE!'); end; ◇[DELPHI]发送虚拟键值ctrl V procedure sendpaste; begin keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), 0, 0); keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), 0, 0); keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), KEYEVENTF_KEYUP, 0); keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), KEYEVENTF_KEYUP, 0); end; ◇[DELPHI]当前的光驱的盘符 procedure getcdrom(var cd:char); var str:string; drivers:integer; driver:char; i,temp:integer; begin drivers:=getlogicaldrives; temp:=(1 and drivers); for i:=0 to 26 do begin if temp=1 then begin driver:=char(i+integer('a')); str:=driver+':'; if getdrivetype(pchar(str))=drive_cdrom then begin cd:=driver; exit; end; end; drivers:=(drivers shr 1); temp:=(1 and drivers); end; end; ◇[DELPHI]字符的加密与解密 function cryptstr(const s:string; stype: dword):string; var i: integer; fkey: integer; begin result:=''; case stype of 0: setpass; begin randomize; fkey := random($ff); for i:=1 to length(s) do result := result+chr( ord(s[i]) xor i xor fkey); result := result + char(fkey); end; 1: getpass begin fkey := ord(s[length(s)]); for i:=1 to length(s) - 1 do result := result+chr( ord(s[i]) xor i xor fkey); end; end; □◇[DELPHI]向其他应用程序发送模拟键 var h: THandle; begin h := FindWindow(nil, '应用程序标题'); PostMessage(h, WM_KEYDOWN, VK_F9, 0);//发送F9键 end; □◇[DELPHI]DELPHI 支持的DAO数据格式 td.Fields.Append(td.CreateField ('dbBoolean',dbBoolean,0)); td.Fields.Append(td.CreateField ('dbByte',dbByte,0)); td.Fields.Append(td.CreateField ('dbInteger',dbInteger,0)); td.Fields.Append(td.CreateField ('dbLong',dbLong,0)); td.Fields.Append(td.CreateField ('dbCurrency',dbCurrency,0)); td.Fields.Append(td.CreateField ('dbSingle',dbSingle,0)); td.Fields.Append(td.CreateField ('dbDouble',dbDouble,0)); td.Fields.Append(td.CreateField ('dbDate',dbDate,0)); td.Fields.Append(td.CreateField ('dbBinary',dbBinary,0)); td.Fields.Append(td.CreateField ('dbText',dbText,0)); td.Fields.Append(td.CreateField ('dbLongBinary',dbLongBinary,0)); td.Fields.Append(td.CreateField ('dbMemo',dbMemo,0)); td.Fields['ID'].Set_Attributes(dbAutoIncrField);//自增字段 □◇[DELPHI]DELPHI配置MS SQL 7和BDE步骤 第一步，配置ODBC： 先在ODBC 中设数据源，安装过SQL Server7.0 后,ODBC中有一项"系统DSN"应该有两项 数据源，一个是MQIS，一个是LocalSever，任选一个选后点击配置按钮，不知你的SQL7.0 是不是安装在本地机器上，如果是的话直接进行下一步，如果不是，在服务器一栏中填上 Server,然后进行下一步，填写登录ID 和密码（登录ID，和密码是在SQL7.0中的用户选项 中设的）。 第二步，配置BDE: 打开Delphi的BDE，然后点击MQIS 或 LocalServer，就会提示用户名和密码，这和 ODBC的用户名和密码是一样的，填上就行了。 第三步，配置程序： 如果用的是TTable，就在TTable的DatabaseName中选择MQIS 或LocalServer,然后在 TableName中选择Sale就行了，然后将Active改为True,Delphi弹出提示对话，填入用户 名和密码。 如果用的是TQuery,在TQuery上点击右键，再击"SQL Builder"，这是以界面方式配置 SQL语句，或者在TQuery的SQL中填入SQL语句。最后，别忘了将Active改为True。 在运行也可能配置TQuery,具体见Delphi帮助。 □◇[DELPHI]得到图像上某一点的RGB值 procedure TForm1.Image1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer); var red,green,blue:byte ; i:integer; begin i:= image1.Canvas.Pixels[x,y]; Blue:= GetBValue(i); Green:= GetGValue(i): Red:= GetRValue(i); Label1.Caption:=inttostr(Red); Label2.Caption:=inttostr(Green); Label3.Caption:=inttostr(Blue); end; □◇[DELPHI]关于日期格式分解转换 var year,month,day:word;now2:Tdatatime; now2:=date(); decodedate(now2,year,month,day); lable1.Text :=inttostr(year)+'年'+inttostr(month)+'月'+inttostr(day)+'日'; ◇[DELPHI]如何判断当前网络连接方式 判断结果是MODEM、局域网或是代理服务器方式。 uses wininet; Function ConnectionKind :boolean; var flags: dword; begin Result := InternetGetConnectedState(@flags, 0); if Result then begin if (flags and INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM then begin showmessage('Modem'); end; if (flags and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then begin showmessage('LAN'); end; if (flags and INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY then begin showmessage('Proxy'); end; if (flags and INTERNET_CONNECTION_MODEM_BUSY)=INTERNET_CONNECTION_MODEM_BUSY then begin showmessage('Modem Busy'); end; end; end; ◇[DELPHI]如何判断字符串是否是有效EMAIL地址 function IsEMail(EMail: String): Boolean; var s: String;ETpos: Integer; begin ETpos:= pos('@', EMail); if ETpos > 1 then begin s:= copy(EMail,ETpos+1,Length(EMail)); if (pos('.', s) > 1) and (pos('.', s) < length(s)) then Result:= true else Result:= false; end else Result:= false; end; ◇[DELPHI]判断系统是否连接INTERNET 需要引入URL.DLL中的InetIsOffline函数。 函数申明为： function InetIsOffline(Flag: Integer): Boolean; stdcall; external 'URL.DLL'; 然后就可以调用函数判断系统是否连接到INTERNET if InetIsOffline(0) then ShowMessage('not connected!') else ShowMessage('connected!'); 该函数返回TRUE如果本地系统没有连接到INTERNET。 附： 大多数装有IE或OFFICE97的系统都有此DLL可供调用。 InetIsOffline BOOL InetIsOffline( DWORD dwFlags, ); ◇[DELPHI]简单地播放和暂停WAV文件 uses mmsystem; function PlayWav(const FileName: string): Boolean; begin Result := PlaySound(PChar(FileName), 0, SND_ASYNC); end; procedure StopWav; var buffer: array[0..2] of char; begin buffer[0] := #0; PlaySound(Buffer, 0, SND_PURGE); end; ◇[DELPHI]取机器BIOS信息 with Memo1.Lines do begin Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061)))); Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091)))); Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5)))); Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71)))); end; ◇[DELPHI]网络下载文件 uses UrlMon; function DownloadFile(Source, Dest: string): Boolean; begin try Result := UrlDownloadToFile(nil, PChar(source), PChar(Dest), 0, nil) = 0; except Result := False; end; end; if DownloadFile('http://www.borland.com/delphi6.zip, 'c:\kylix.zip') then ShowMessage('Download succesful') else ShowMessage('Download unsuccesful') ◇[DELPHI]解析服务器IP地址 uses winsock function IPAddrToName(IPAddr : String): String; var SockAddrIn: TSockAddrIn; HostEnt: PHostEnt; WSAData: TWSAData; begin WSAStartup($101, WSAData); SockAddrIn.sin_addr.s_addr:= inet_addr(PChar(IPAddr)); HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET); if HostEnt<>nil then result:=StrPas(Hostent^.h_name) else result:=''; end; ◇[DELPHI]取得快捷方式中的连接 function ExeFromLink(const linkname: string): string; var FDir, FName, ExeName: PChar; z: integer; begin ExeName:= StrAlloc(MAX_PATH); FName:= StrAlloc(MAX_PATH); FDir:= StrAlloc(MAX_PATH); StrPCopy(FName, ExtractFileName(linkname)); StrPCopy(FDir, ExtractFilePath(linkname)); z:= FindExecutable(FName, FDir, ExeName); if z > 32 then Result:= StrPas(ExeName) else Result:= ''; StrDispose(FDir); StrDispose(FName); StrDispose(ExeName); end; ◇[DELPHI]控制TCombobox的自动完成 {'Sorted' property of the TCombobox to true } var lastKey: Word; //全局变量 //TCombobox的OnChange事件 procedure TForm1.AutoCompleteChange(Sender: TObject); var SearchStr: string; retVal: integer; begin SearchStr := (Sender as TCombobox).Text; if lastKey <> VK_BACK then // backspace: VK_BACK or $08 begin retVal := (Sender as TCombobox).Perform(CB_FINDSTRING, -1, LongInt(PChar(SearchStr))); if retVal > CB_Err then begin (Sender as TCombobox).ItemIndex := retVal; (Sender as TCombobox).SelStart := Length(SearchStr); (Sender as TCombobox).SelLength := (Length((Sender as TCombobox).Text) - Length(SearchStr)); end; // retVal > CB_Err end; // lastKey <> VK_BACK lastKey := 0; // reset lastKey end; //TCombobox的OnKeyDown事件 procedure TForm1.AutoCompleteKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState); begin lastKey := Key; end; ◇[DELPHI]如何清空一个目录 function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) : Boolean; var SearchRec : TSearchRec; Res : Integer; begin Result := False; TheDirectory := NormalDir(TheDirectory); Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec); try while Res = 0 do begin if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then begin if ((SearchRec.Attr and faDirectory) > 0) and Recursive then begin EmptyDirectory(TheDirectory + SearchRec.Name, True); RemoveDirectory(PChar(TheDirectory + SearchRec.Name)); end else begin DeleteFile(PChar(TheDirectory + SearchRec.Name)) end; end; Res := FindNext(SearchRec); end; Result := True; finally FindClose(SearchRec.FindHandle); end; end; ◇[DELPHI]如何计算一个目录的大小 function GetDirectorySize(const ADirectory: string): Integer; var Dir: TSearchRec; Ret: integer; Path: string; begin Result := 0; Path := ExtractFilePath(ADirectory); Ret := Sysutils.FindFirst(ADirectory, faAnyFile, Dir); if Ret <> NO_ERROR then exit; try while ret=NO_ERROR do begin inc(Result, Dir.Size); if (Dir.Attr in [faDirectory]) and (Dir.Name[1] <> '.') then Inc(Result, GetDirectorySize(Path + Dir.Name + '\*.*')); Ret := Sysutils.FindNext(Dir); end; finally Sysutils.FindClose(Dir); end; end; ◇[DELPHI]安装程序如何添加到Uninstall列表 操作注册表，如下： 1.在HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall键下建立一个主键，名称任意。 例HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MyUninstall 2.在HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MyUnistall下键两个串值， 这两个串值的名称是特定的：DisplayName和UninstallString。 3.给串DisplayName赋值为显示在“删除应用程序列表”中的名称，如'Aiming Uninstall one'; 给串UninstallString赋值为执行的删除命令，如 C:\WIN97\uninst.exe -f"C:\TestPro\aimTest.isu" ◇[DELPHI]截获WM_QUERYENDSESSION关机消息 type TForm1 = class(TForm) procedure WMQueryEndSession(var Message: TWMQueryEndSession); message WM_QUERYENDSESSION; procedure CMEraseBkgnd(var Message:TWMEraseBkgnd);Message WM_ERASEBKGND; private { Private declarations } public { Public declarations } end; procedure TForm1.WMQueryEndSession(var Message: TWMQueryEndSession); begin Showmessage('computer is about to shut down'); end; ◇[DELPHI]获取网上邻居 procedure getnethood();//NT做服务器，WIN98上调试通过。 var a,i:integer; errcode:integer; netres:array[0..1023] of netresource; enumhandle:thandle; enumentries:dword; buffersize:dword; s:string; mylistitems:tlistitems; mylistitem:tlistitem; alldomain:tstrings; begin //listcomputer is a listview to list all computers;controlcenter is a form. alldomain:=tstringlist.Create ; with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_ANY; dwdisplaytype :=RESOURCEDISPLAYTYPE_DOMAIN; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=nil; lpcomment :=nil; lpprovider :=nil; end; // 获取所有的域 errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle); if errcode=NO_ERROR then begin enumentries:=1024; buffersize:=sizeof(netres); errcode:=wnetenumresource(enumhandle,enumentries,@netres[0],buffersize); end; a:=0; mylistitems :=controlcenter.lstcomputer.Items ; mylistitems.Clear ; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin alldomain.Add (netres[a].lpremotename); a:=a+1; end; wnetcloseenum(enumhandle); // 获取所有的计算机 mylistitems :=controlcenter.lstcomputer.Items ; mylistitems.Clear ; for i:=0 to alldomain.Count-1 do begin with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_ANY; dwdisplaytype :=RESOURCEDISPLAYTYPE_SERVER; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=pchar(alldomain[i]); lpcomment :=nil; lpprovider :=nil; end; ErrCode:=WNetOpenEnum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],EnumHandle); if errcode=NO_ERROR then begin EnumEntries:=1024; BufferSize:=SizeOf(NetRes); ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize); end; a:=0; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin mylistitem :=mylistitems.Add ; mylistitem.ImageIndex :=0; mylistitem.Caption :=uppercase(stringreplace(string(NetRes[a].lpremotename),'\\','',[rfReplaceAll])); a:=a+1; end; wnetcloseenum(enumhandle); end; end; ◇[DELPHI]获取某一计算机上的共享目录 procedure getsharefolder(const computername:string); var errcode,a:integer; netres:array[0..1023] of netresource; enumhandle:thandle; enumentries,buffersize:dword; s:string; mylistitems:tlistitems; mylistitem:tlistitem; mystrings:tstringlist; begin with netres[0] do begin dwscope :=RESOURCE_GLOBALNET; dwtype :=RESOURCETYPE_DISK; dwdisplaytype :=RESOURCEDISPLAYTYPE_SHARE; dwusage :=RESOURCEUSAGE_CONTAINER; lplocalname :=nil; lpremotename :=pchar(computername); lpcomment :=nil; lpprovider :=nil; end; // 获取根结点 errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_DISK,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle); if errcode=NO_ERROR then begin EnumEntries:=1024; BufferSize:=SizeOf(NetRes); ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize); end; wnetcloseenum(enumhandle); a:=0; mylistitems:=controlcenter.lstfile.Items ; mylistitems.Clear ; while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do begin with mylistitems do begin mylistitem:=add; mylistitem.ImageIndex :=4; mylistitem.Caption :=extractfilename(netres[a].lpremotename); end; a:=a+1; end; end; ◇[DELPHI]得到硬盘序列号 var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char; begin if GetVolumeInformation('c:\', Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Label1.Caption := IntToStr(SerialNum^); end; ◇[DELPHI]MEMO的自动翻页 Procedure ScrollMemo(Memo : TMemo; Direction : char); begin case direction of 'd': begin SendMessage(Memo.Handle, { HWND of the Memo Control } WM_VSCROLL, { Windows Message } SB_PAGEDOWN, { Scroll Command } 0) { Not Used } end; 'u' : begin SendMessage(Memo.Handle, { HWND of the Memo Control } WM_VSCROLL, { Windows Message } SB_PAGEUP, { Scroll Command } 0); { Not Used } end; end; end; procedure TForm1.Button1Click(Sender: TObject); begin ScrollMemo(Memo1,'d'); //上翻页 end; procedure TForm1.Button1Click(Sender: TObject); begin ScrollMemo(Memo1,'u'); //下翻页 end; ◇[DELPHI]DBGrid中回车到下个位置(Tab键) procedure TForm1.DBGrid1KeyPress(Sender: TObject; var Key: Char); begin if Key = #13 then if DBGrid1.Columns.Grid.SelectedIndex < DBGrid1.Columns.Count - 1 then DBGrid1.Columns[DBGrid1.Columns.grid.SelectedIndex + 1].Field.FocusControl else begin Table1.next; DBGrid1.Columns[0].field.FocusControl; end; end; ◇[DELPHI]如何安装控件 安装方法： 1.对于单个控件，Component-->install component..-->PAS或DCU文件-->install 2.对于带*.dpk文件的控件包，File-->open(下拉列表框中选*.dpk)-->install即可. 3.对于带*.dpl文件的控件包，Install Packages-->Add-->dpl文件名即可。 4.如果以上Install按钮为失效的话，试试Compile按钮。 5.是run time lib则在option下的packages下的runtimepackes加之. 如果编译时提示文件找不到的话，一般是控件的安装目录不在delphi的Lib目录中，有两种方法可以解决： 1.把安装的原文件拷入到delphi的Lib目录下。 2.或者Tools-->Environment Options中把控件原代码路径加入到Delphi的Lib目录中即可。 ◇[DELPHI]目录完全删除（deltree） procedure TForm1.DeleteDirectory(strDir:String); var sr: TSearchRec; FileAttrs: Integer; strfilename:string; strPth:string; begin strpth:=Getcurrentdir(); FileAttrs := faAnyFile; if FindFirst(strpth+'\'+strdir+'\*.*', FileAttrs, sr) = 0 then begin if (sr.Attr and FileAttrs) = sr.Attr then begin strfilename:=sr.Name; if fileexists(strpth+'\'+strdir+'\'+strfilename) then deletefile(strpth+'\'+strdir+'\'+strfilename); end; while FindNext(sr) = 0 do begin if (sr.Attr and FileAttrs) = sr.Attr then begin strfilename:=sr.name; if fileexists(strpth+'\'+strdir+'\'+strfilename) then deletefile(strpth+'\'+strdir+'\'+strfilename); end; end; FindClose(sr); removedir(strpth+'\'+strdir); end; end; ◇[DELPHI]取得TMemo 控件当前光标的行和列信息到Tpoint中 1.function ReadCursorPos(SourceMemo: TMemo): TPoint; var Point: TPoint; begin point.y := SendMessage(SourceMemo.Handle,EM_LINEFROMCHAR,SourceMemo.SelStart,0); point.x := SourceMemo.SelStart-SendMessage(SourceMemo.Handle,EM_LINEINDEX,point.y,0); Result := Point; end; 2.LineLength：=SendMessage（memol．handle，EM—LINELENGTH，Cpos，0）；//行长 ◇[DELPHI]读硬盘序列号 function GetDiskSerial(DiskChar: Char): string; var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char; begin result := ""; if GetVolumeInformation(PChar(diskchar+":\"), Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Result := IntToStr(SerialNum^); end; ◇[INTERNET]CSS常用综合技巧 1。P:first-letter { font-size: 300%; float: left }//首字会比普通字体加大三倍。 2。<LINK REL=StyleSheet HREF="basics.css" TITLE="Contemporary">//连接一个外部样式表 3。嵌入一个样式表 <STYLE TYPE="text/css" MEDIA=screen> <!-- @import url(http://www.htmlhelp.com/style.css);//外部导入一个样式表 @import url(/stylesheets/punk.css);//同上 BODY { background: url(foo.gif) red; color: black } .punk { color: lime; background: #ff80c0 }//引用见5。 #wdg97 { font-size: larger }//引用见6。 --> </STYLE> 4。<P STYLE="color: red; font-family: 'New Century Schoolbook', serif"> //内联样式 <SPAN STYLE="font-family: Arial">Arial</SPAN>//SPAN接受STYLE、CLASS和ID属性 <DIV CLASS=note><P>DIV可以包含段落、标题、表格甚至其它部分</P></DIV> 5。<H1 CLASS=punk>CLASS属性</H1>//定义见3。 6。<P ID=wdg97>ID属性</P>//定义见3。 7。属性列表 字体风格：font-style: [normal | italic | oblique]; 字体大小：font-size: [xx-small | x-small | small | medium | large | x-large | xx-large | larger | smaller | <长度> | <百分比>] 文本修饰：text-decoration:[ underline || overline || line-through || blink ] 文本转换：text-transform:[none | capitalize | uppercase | lowercase] 背景颜色：background-color:[<颜色> | transparent] 背景图象：background-image:[<URLs> | none] 行高：line-height: [normal | <数字> | <长度> | <百分比>] 边框样式：border-style: [ none | dotted | dashed | solid | double | groove | ridge | inset | outset ] 漂浮：float: [left | right | none] 8。长度单位 相对单位： em (em，元素的字体的高度) ex (x-height，字母 "x" 的高度) px (像素，相对于屏幕的分辨率) 绝对长度： in (英寸，1英寸=2.54厘米) cm (厘米，1厘米=10毫米) mm (米) pt (点，1点=1/72英寸) pc (帕，1帕=12点) ◇[DELPHI]VCL制作简要步骤 1.创建部件属性方法事件 （建立库单元，继承为新的类型，添加属性、方法、事件，注册部件，建立包文件） 2.消息处理 3.异常处理 4.部件可视 ◇[DELPHI]动态连接库的装载 静态装载：procedure name;external 'lib.dll'; 动态装载：var handle:Thandle; handle:=loadlibrary('lib.dll'); if handle<>0 then begin {dosomething} freelibrary(handle); end; ◇[DELPHI]指针变量和地址 var x,y:integer;p:^integer;//指向INTEGER变量的指针 x:=10;//变量赋值 p:=@x;//变量x的地址 y:=p^;//为Y赋值指针P @@procedure//返回过程变量的内存地址 ◇[DELPHI]判断字符是汉字的一个字符 ByteType('你好haha吗',1) = mbLeadByte//是第一个字符 ByteType('你好haha吗',2) = mbTrailByte//是第二个字符 ByteType('你好haha吗',5) = mbSingleByte//不是中文字符 ◇[DELPHI]memo的定位操作 memo1.lines.delete(0)//删除第1行 memo1.selstart:=10//定位10字节处 ◇[DELPHI]获得双字节字符内码 function getit(s: string): integer; begin Result := byte(s[1]) * $100 + byte(s[2]); end; 使用：getit('计')//$bcc6 即十进制 48326 ◇[DELPHI]调用ADD数据存储过程 存储过程如下： create procedure addrecord( record1 varchar(10) record2 varchar(20) ) as begin insert into tablename (field1,field2) values(:record1,:record2) end 执行存储过程： EXECUTE procedure addrecord("urrecord1","urrecord2") ◇[DELPHI]将文件存到blob字段中 function blobcontenttostring(const filename: string):string; begin with tfilestream.create(filename,fmopenread) do try setlength(Result,size); read(Pointer(Result)^,size); finally free; end; end; //保存字段 begin if (opendialog1.execute) then begin sFileName:=OpenDialog1.FileName; adotable1.edit; adotable1.fieldbyname('visio').asstring:=Blobcontenttostring(FileName); adotable1.post; end; ◇[DELPHI]把文件全部复制到剪贴板 uses shlobj,activex,clipbrd; procedure Tform1.copytoclipbrd(var FileName:string); var FE:TFormatEtc; Medium: TStgMedium; dropfiles:PDropFiles; pFile:PChar; begin FE.cfFormat := CF_HDROP; FE.dwAspect := DVASPECT_CONTENT; FE.tymed := TYMED_HGLOBAL; Medium.hGlobal := GlobalAlloc(GMEM_SHARE or GMEM_ZEROINIT, SizeOf(TDropFiles)+length(FileName)+1); if Medium.hGlobal<>0 then begin Medium.tymed := TYMED_HGLOBAL; dropfiles := GlobalLock(Medium.hGlobal); try dropfiles^.pfiles := SizeOf(TDropFiles); dropfiles^.fwide := False; longint(pFile) := longint(dropfiles)+SizeOf(TDropFiles); StrPCopy(pFile,FileName); Inc(pFile, Length(FileName)+1); pFile^ := #0; finally GlobalUnlock(Medium.hGlobal); end; Clipboard.SetAsHandle(CF_HDROP,Medium.hGlobal); end; end; ◇[DELPHI]列举当前系统运行进程 uses TLHelp32; procedure TForm1.Button1Click(Sender: TObject); var lppe: TProcessEntry32; found : boolean; Hand : THandle; begin Hand := CreateToolhelp32Snapshot(TH32CS_SNAPALL,0); found := Process32First(Hand,lppe); while found do begin ListBox1.Items.Add(StrPas(lppe.szExeFile)); found := Process32Next(Hand,lppe); end; end; ◇[DELPHI]根据BDETable1建立新表Table2 Table2:=TTable.Create(nil); try Table2.DatabaseName:=Table1.DatabaseName; Table2.FieldDefs.Assign(Table1.FieldDefs); Table2.IndexDefs.Assign(Table1.IndexDefs); Table2.TableName:='new_table'; Table2.CreateTable(); finally Table2.Free(); end; ◇[DELPHI]最菜理解DLL建立和引用 //先看DLL source(FILE-->NEW-->DLL) library project1; uses SysUtils, Classes; function addit(f:integer;s:integer):integer;export; begin makeasum:=f+s; end; exports addit; end. //调用(IN ur PROJECT) implementation function addit(f:integer;s:integer):integer;far;external 'project1';//申明 {调用就是addit(2,4);结果显示6} ◇[DELPHI]动态读取程序自身大小 function GesSelfSize: integer; var f: file of byte; begin filemode := 0; assignfile(f, application.exename); reset(f); Result := filesize(f);//单位是字节 closefile(f); end; ◇[DELPHI]读取BIOS信息 with Memo1.Lines do begin Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061)))); Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091)))); Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5)))); Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71)))); end; ◇[DELPHI]动态建立MSSQL别名 procedure TForm1.Button1Click(Sender: TObject); var MyList: TStringList; begin MyList := TStringList.Create; try with MyList do begin Add('SERVER NAME=210.242.86.2'); Add('DATABASE NAME=db'); Add('USER NAME=sa'); end; Session1.AddAlias('TESTSQL', 'MSSQL', MyList); //ミMSSQL Session1.SaveConfigFile; finally MyList.Free; Session1.Active:=True; Database1.DatabaseName:='DB'; Database1.AliasName:='TESTSQL'; Database1.LoginPrompt:=False; Database1.Params.Add('USER NAME=sa'); Database1.Params.Add('PASSWORD='); Database1.Connected:=True; end; end; procedure TForm1.Button2Click(Sender: TObject); begin Database1.Connected:=False; Session1.DeleteAlias('TESTSQL'); end; ◇[DELPHI]播放背景音乐 uses mmsystem //播放音乐 MCISendString('OPEN e:\1.MID TYPE SEQUENCER ALIAS NN', '', 0, 0); MCISendString('PLAY NN FROM 0', '', 0, 0); MCISendString('CLOSE ANIMATION', '', 0, 0); end; //停止播放 MCISendString('OPEN e:\1.MID TYPE SEQUENCER ALIAS NN', '', 0, 0); MCISendString('STOP NN', '', 0, 0); MCISendString('CLOSE ANIMATION', '', 0, 0); ◇[DELPHI]接口和类的一个范例代码 Type{接口和类申明：区别在于不能在接口中申明数据成员、任何非公有的方法、公共方法不使用PUBLIC关键字} Isample=interface//定义Isample接口 function getstring:string; end; Tsample=class(TInterfacedObject,Isample) public function getstring:string; end; //function定义 function Tsample.getstring:string; begin result:='what show is '; end; //调用类对象 var sample:Tsample; begin sample:=Tsample.create; showmessage(sample.getstring+'class object!'); sample.free; end; //调用接口 var sampleinterface:Isample; sample:Tsample; begin sample:=Tsample.create; sampleInterface:=sample;//Interface的实现必须使用class {以上两行也可表达成sampleInterface:=Tsample.create;} showmessage(sampleInterface.getstring+'Interface!'); //sample.free;{和局部类不同，Interface中的类自动释放} sampleInterface:=nil;{释放接口对象} end; ◇[DELPHI]任务条就看不当程序 var ExtendedStyle : Integer; begin Application.Initialize; ExtendedStyle := GetWindowLong (Application.Handle, GWL_EXSTYLE); SetWindowLong(Application.Handle, GWL_EXSTYLE, ExtendedStyle OR WS_EX_TOOLWINDOW AND NOT WS_EX_APPWINDOW); Application.CreateForm(TForm1, Form1); Application.Run; end. ◇[DELPHI]ALT+CTRL+DEL看不到程序 在implementation后添加声明: function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer; stdcall; external 'KERNEL32.DLL'; RegisterServiceProcess(GetCurrentProcessID, 1);//隐藏 RegisterServiceProcess(GetCurrentProcessID, 0);//显示 ◇[DELPHI]检测光驱符号 var drive:char; cdromID:integer; begin for drive:='d' to 'z' do begin cdromID:=GetDriveType(pchar(drive+':\')); if cdromID=5 then showmessage('你的光驱为:'+drive+'盘!'); end; end; ◇[DELPHI]检测声卡 if auxGetNumDevs()<=0 then showmessage('No soundcard found!') else showmessage('Any soundcard found!'); ◇[DELPHI]在字符串网格中画图 StringGrid.OnDrawCell事件 with StringGrid1.Canvas do Draw(Rect.Left, Rect.Top, Image1.Picture.Graphic); ◇[SQL SERVER]SQL中代替Like语句的另一种写法 比如查找用户名包含有"c"的所有用户, 可以用 use mydatabase select * from table1 where username like'%c%" 下面是完成上面功能的另一种写法: use mydatabase select * from table1 where charindex('c',username)>0 这种方法理论上比上一种方法多了一个判断语句,即>0, 但这个判断过程是最快的, 我想信80%以上的运算都是花在查找字 符串及其它的运算上, 所以运用charindex函数也没什么大不了. 用这种方法也有好处, 那就是对%,|等在不能直接用like 查找到的字符中可以直接在这charindex中运用, 如下: use mydatabase select * from table1 where charindex('%',username)>0 也可以写成: use mydatabase select * from table1 where charindex(char(37),username)>0 ASCII的字符即为% ◇[DELPHI]SQL显示多数据库/表 SELECT DISTINCT A.bianhao,a.xingming, b.gongzi FROM "jianjie.dbf" a, "gongzi.DBF" b WHERE A.bianhao=b.bianhao ◇[DELPHI]RFC(Request For Comment)相关 IETF(Internet Engineering Task Force)维护RFC文档http://www.ietf.cnri.reston.va.us RFC882：报文头标结构 RFC1521：MIME第一部分，传输报文方法 RFC1945：多媒体文档传输文档 ◇[DELPHI]TNMUUProcessor的使用 var inStream,outStream:TFileStream; begin inStream:=TFileStream.create(infile.txt,fmOpenRead); outStream:=TFileStream(outfile.txt,fmCreate); NMUUE.Method:=uuCode;{UUEncode/Decode} //NMUUE.Method:=uuMIME;{MIME} NMUUE.InputStream:=InStream; NMUUE.OutputStream:=OutStream; NMUUE.Encode;{编码处理} //NMUUE.Decode;{解码处理} inStream.free; outStream.free; end; ◇[DELPHI]TFileStream的操作 //从文件流当前位置读count字节到缓冲区BUFFER function read(var buffer;count:longint):longint;override; //将缓冲区BUFFER读到文件流中 function write(const buffer;count:longint):longint;override; //设置文件流当前读写指针为OFFSET function seek(offset:longint;origin:word):longint;override; origin={soFromBeginning,soFromCurrent,soFromEnd} //从另一文件流中当前位置复制COUNT到当前文件流当前位置 function copyfrom(source:TStream;count:longint):longint; //读指定文件到文件流 var myFStream:TFileStream; begin myFStream:=TFileStream.create(OpenDialog1.filename,fmOpenRead); end; [JavaScript]检测是否安装IE插件Shockwave&Quicktime <script LANGUAGE="JavaScript"> var myPlugin = navigator.plugins["Shockwave"]; if (myPlugin) document.writeln("你已经安装了 Shockwave!") else document.writeln("你尚未安装 Shockwave!") </script><br> <script LANGUAGE="JavaScript"> var myPlugin = navigator.plugins["Quicktime"]; if (myPlugin) document.writeln("你已经安装了Quicktime!") else document.writeln("你尚未安装 Quicktime!") </script> [INTERNET]表格中引用IFRAME效果 <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td><ILAYER id="ad1" visibility="hidden" height="60"></ILAYER> <NOLAYER> <IFRAME SRC="i:\jinhtml\zj\h21.htm" width="500" height="200" marginwidth="0" marginheight="110" hspace="10" vspace="20" frameborder="0" scrolling="1"></IFRAME> </NOLAYER> </td> </tr> </table> ◇[DELPHI]WebBrowser控件技巧 1。实现打印功能 var vaIn, vaOut: OleVariant; WebBrowser.ControlInterface.ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER, vaIn, vaOut); 2。WebBrowser从流中读取页面 function TForm1.LoadFromStream(const AStream: TStream): HRESULT; begin AStream.seek(0, 0); Result := (WebBrowser1.Document as IPersistStreamInit).Load(TStreamAdapter.Create(AStream)); end; 3。"about:" protocol will let you Navigate to an HTML string: procedure TForm1.LoadHTMLString(sHTML: String); var Flags, TargetFrameName, PostData, Headers: OleVariant; WebBrowser1.Navigate('about:' + sHTML, Flags, TargetFrameName, PostData, Headers) 4。"res:" protocol will let you Navigate to an HTML file stored as a resource. More informations is available from the Microsoft site: procedure TForm1.LoadHTMLResource; var Flags, TargetFrameName, PostData, Headers: OleVariant; WebBrowser1.Navigate('res://' + Application.ExeName + '/myhtml', Flags, TargetFrameName, PostData, Headers) 使用brcc32.exe建立资源文件 (*.rc) MYHTML 23 ".\html\myhtml.htm" MOREHTML 23 ".\html\morehtml.htm" {$R HTML.RES} //html.rc被编译成html.res 5。保存完整的HTML文件 var HTMLDocument: IHTMLDocument2; PersistFile: IPersistFile; begin HTMLDocument := WebBrowser1.Document as IHTMLDocument2; PersistFile := HTMLDocument as IPersistFile; PersistFile.Save(StringToOleStr('test.htm'), True); while HTMLDocument.readyState <> 'complete' do Application.ProcessMessages; end; ◇[DELPHI]安装WebBrowser控件（内嵌IE控件） 你必须先确定系统已安装Internet Explorer4或以后版本，DELPHI菜单--Component- - Import ActiveX Contro，列表中选择Microsoft Internet Controls"并ADD到一个已存在的包文件中，WebBrowser控件将显示在ActiveX控件面板。 ◇[DELPHI]实现windows2000半透明窗体 function SetLayeredWindowAttributes(hwnd:HWND; crKey:Longint; bAlpha:byte; dwFlags:longint ):longint; stdcall; external user32;//函数声明 procedure TForm1.FormCreate(Sender: TObject); var l:longint; begin l:=getWindowLong(Handle, GWL_EXSTYLE); l := l Or $80000; SetWindowLong (handle, GWL_EXSTYLE, l); SetLayeredWindowAttributes(handle, 0, 180, 2); end; ◇[DELPHI]程序显示广告WebBrowser加载图片 var Flag, frame, pData, Header: OLEVariant; begin WebBrowser1.Navigate('http://www.chineseall.com/images/logo.jpg', flag, frame,pData, Header) end; ◇[DELPHI]计算一个目录的大小 function GetDirectorySize(const ADirectory: string): Integer; var Dir: TSearchRec; Ret: integer; Path: string; begin Result := 0; Path := ExtractFilePath(ADirectory); Ret := Sysutils.FindFirst(ADirectory, faAnyFile, Dir); if Ret <> NO_ERROR then exit; try while ret=NO_ERROR do begin inc(Result, Dir.Size); //如果是目录，且不是'.'或'..'则进行递归调用 if (Dir.Attr in [faDirectory]) and (Dir.Name[1] <> '.') then Inc(Result, GetDirectorySize(Path + Dir.Name + '\*.*')); Ret := Sysutils.FindNext(Dir); end; finally Sysutils.FindClose(Dir); end; end; ◇[DELPHI]清空一个目录 function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) : Boolean; var SearchRec : TSearchRec; Res : Integer; begin Result := False; TheDirectory := NormalDir(TheDirectory); Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec); try while Res = 0 do begin if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then begin if ((SearchRec.Attr and faDirectory) > 0) and Recursive then begin EmptyDirectory(TheDirectory + SearchRec.Name, True); RemoveDirectory(PChar(TheDirectory + SearchRec.Name)); end else begin DeleteFile(PChar(TheDirectory + SearchRec.Name)) end; end; Res := FindNext(SearchRec); end; Result := True; finally FindClose(SearchRec.FindHandle); end; end; ◇[DELPHI]发布ADO程序之安装ADO 运行一次 MDac_typ.exe ，这个文件在微软的 Windows、IE、Office、Visual Studio 中都有。 安装程序所安装后的目录与程序中设置的目录路径一样，C:\Program Files\Common Files\System\ado文件夹中有没有ADO组件，装ACCESS2000就有ADO2.1，没有则安装MS OFfice2000，编译要去掉project->Option->Packages对话框中的Build With RunTime Library的勾。 ◇[DELPHI]拦截Windows系统消息：WM_CLOSE消息 procedure WMClose(var Msg: TMessage);message WM_CLOSE; procedure TMainForm.WMClose(var Msg: TMessage); begin m_bCloseNoQuery := false; inherited; end; 来自：Adnil, 时间：2002-3-26 14:54:00, ID：1003492 强！ 大致看了一下，提两个修改意见： ◇[DELPHI]设置窗体的最大显示 onFormCreate事件 self.width:=screen.width; self.height:=screen.height; 修改： self.windowstate := wsmaxmized; ◇[DELPHI]文件名的非法字符过滤 for i:=1 to length(s) do if s[i] in ['\','/',':','*','?','<','>','|'] then 修改： try slist := tstringlist.create; slist.savetofile(s); result := true; deletefile(s); except result := false; end; 利用异常机制，这样可以兼容linux的文件命名。 追加部分 ◇[DELPHI]配置ODBC的代码 var reg: TRegistry; Driver: string; begin //建立和更新odbc数据源 //查找ODBCINST.INI键,如果sql server的驱动程序没有安装，则提示退出 //如果存在，则进行配置 reg := TRegistry.Create; try with reg do begin RootKey := HKEY_LOCAL_MACHINE; if OpenKey('Software\ODBC\ODBCINST.INI\SQL Server', False) then begin //如果存在sql server 驱动程序 Driver := ReadString('Driver'); CloseKey; if OpenKey('Software\ODBC\ODBC.INI\ODBC Data Sources', True) then begin //注册一个DSN名称 WriteString(Edit_DataSource.Text, 'SQL Server'); end else begin //创建键值失败 Application.MessageBox(pchar('在创建DSN' + edit_datasource.text + '时发生错误'), '创建ODBC数据源失败', MB_ICONINFORMATION or MB_OK); exit; end; CloseKey; //end 建立dsn if OpenKey('Software\ODBC\ODBC.INI\' + Edit_DataSource.Text, True) then begin WriteString('Database', Edit_DataSource.Text); WriteString('Driver', Driver); WriteString('LastUser', Edit_LoginUser.Text); WriteString('Server', Edit_Ip.Text); end else begin //创建键值失败 Application.MessageBox(pchar('在创建DSN' + edit_datasource.text + '时发生错误'), '创建ODBC数据源失败', MB_ICONINFORMATION or MB_OK); exit; end; CloseKey; end else Application.MessageBox('在当前机器上没有安装 SQL Server的ODBC 驱动程序!，请安装相应的驱动程序', '驱动程序出错', MB_ICONINFORMATION or MB_OK); CloseKey; end; finally reg.Free; end; end; ◇[DELPHI]验证邮件地址有效函数 function IsValidEmail(const Value: string): boolean; function CheckAllowed(const s: string): boolean; var i: integer; begin Result:= false; for i:= 1 to Length(s) do begin // illegal char in s -> no valid address if not (s[i] in ['a'..'z','A'..'Z','0'..'9','_','-','.']) then Exit; end; Result:= true; end; var i: integer; namePart, serverPart: string; begin // of IsValidEmail Result:= false; i:= Pos('@', Value); if (i = 0) or (pos('..', Value) > 0) then Exit; namePart:= Copy(Value, 1, i - 1); serverPart:= Copy(Value, i + 1, Length(Value)); if (Length(namePart) = 0) // @ or name missing or ((Length(serverPart) < 4)) // name or server missing or then Exit; // too short i:= Pos('.', serverPart); // must have dot and at least 3 places from end if (i = 0) or (i >= (Length(serverPart) - 2)) then Exit; Result:= CheckAllowed(namePart) and CheckAllowed(serverPart); end; ◇[DELPHI]设定IE的默认打开主页 procedure SetStartPage(StartPage:string); var Reg:TRegistry; begin Reg:=TRegistry.Create; Reg.RootKey:=HKEY_CURRENT_USER; Reg.OpenKey(StartPagePath,False); Reg.WriteString('Start Page',StartPage); Reg.Free; end; ◇[DELPHI]FORM边缘特效 procedure TForm1.FormCreate(Sender: TObject); var Region1 : array of tPoint; Region1hrgn : hRgn; Begin SetLength(Region1,59); Region1[0].X:=12; Region1[0].Y:=6; Region1[1].X:=484; Region1[1].Y:=6; Region1[2].X:=484; Region1[2].Y:=7; Region1[3].X:=486; Region1[3].Y:=7; Region1[4].X:=486; Region1[4].Y:=8; Region1[5].X:=487; Region1[5].Y:=8; Region1[6].X:=487; Region1[6].Y:=9; Region1[7].X:=488; Region1[7].Y:=9; Region1.X:=488; Region1.Y:=10; Region1[9].X:=489; Region1[9].Y:=10; Region1[10].X:=489; Region1[10].Y:=12; Region1[11].X:=490; Region1[11].Y:=12; Region1[12].X:=490; Region1[12].Y:=285; Region1[13].X:=489; Region1[13].Y:=285; Region1[14].X:=489; Region1[14].Y:=287; Region1[15].X:=488; Region1[15].Y:=287; Region1[16].X:=488; Region1[16].Y:=288; Region1[17].X:=487; Region1[17].Y:=288; Region1[18].X:=487; Region1[18].Y:=289; Region1[19].X:=486; Region1[19].Y:=289; Region1[20].X:=486; Region1[20].Y:=290; Region1[21].X:=484; Region1[21].Y:=290; Region1[22].X:=484; Region1[22].Y:=291; Region1[23].X:=101; Region1[23].Y:=291; Region1[24].X:=100; Region1[24].Y:=290; Region1[25].X:=99; Region1[25].Y:=290; Region1[26].X:=98; Region1[26].Y:=289; Region1[27].X:=97; Region1[27].Y:=288; Region1[28].X:=96; Region1[28].Y:=287; Region1[29].X:=95; Region1[29].Y:=286; Region1[30].X:=95; Region1[30].Y:=284; Region1[31].X:=94; Region1[31].Y:=283; Region1[32].X:=94; Region1[32].Y:=200; Region1[33].X:=93; Region1[33].Y:=199; Region1[34].X:=93; Region1[34].Y:=198; Region1[35].X:=92; Region1[35].Y:=197; Region1[36].X:=91; Region1[36].Y:=196; Region1[37].X:=90; Region1[37].Y:=195; Region1[38].X:=89; Region1[38].Y:=194; Region1[39].X:=88; Region1[39].Y:=194; Region1[40].X:=87; Region1[40].Y:=193; Region1[41].X:=14; Region1[41].Y:=193; Region1[42].X:=13; Region1[42].Y:=192; Region1[43].X:=12; Region1[43].Y:=192; Region1[44].X:=11; Region1[44].Y:=191; Region1[45].X:=10; Region1[45].Y:=190; Region1[46].X:=9; Region1[46].Y:=189; Region1[47].X:=8; Region1[47].Y:=188; Region1[48].X:=8; Region1[48].Y:=187; Region1[49].X:=7; Region1[49].Y:=186; Region1[50].X:=7; Region1[50].Y:=184; Region1[51].X:=6; Region1[51].Y:=183; Region1[52].X:=6; Region1[52].Y:=12; Region1[53].X:=7; Region1[53].Y:=11; Region1[54].X:=7; Region1[54].Y:=10; Region1[55].X:=8; Region1[55].Y:=9; Region1[56].X:=9; Region1[56].Y:=8; Region1[57].X:=10; Region1[57].Y:=7; Region1[58].X:=11; Region1[58].Y:=7; Region1hrgn:=CreatePolygonRgn(Region1[0],59,2); SetWindowRgn(Handle, Region1hrgn, True); end; ◇[DELPHI]LISTVIEW实现隔行背景颜色 procedure TForm1.ListView1AdvancedCustomDrawItem(Sender: TCustomListView; Item: TListItem; State: TCustomDrawState; Stage: TCustomDrawStage; var DefaultDraw: Boolean); begin if item.Index mod 2 = 1 then begin sender.Canvas.Brush.Color:=clYellow; end else sender.Canvas.Brush.Color:=clwhite; end; ◇[DELPHI]判断机器是否网络状态 uses WinInet; procedure TForm1.Button1Click(Sender: TObject); function GetOnlineStatus : Boolean; var ConTypes : Integer; begin ConTypes := INTERNET_CONNECTION_MODEM + INTERNET_CONNECTION_LAN + INTERNET_CONNECTION_PROXY; if (InternetGetConnectedState(@ConTypes, 0) = False) then Result := False else Result := True; end; begin if not GetOnlineStatus then ShowMessage('Not Connected'); end; ◇[DELPHI]窗体渐渐出现 AnimateWindow(Handle,1000,AW_CENTER); //在窗体创建事件中 ◇[DELPHI]制作竖式菜单图片的关键代码 ONDrawItem事件 begin acanvas.Draw(0,2,image1.picture.bitmap); anvas.TextOut(arect.left+image1.picture.bitmap.width+2,arect.top,tmenuitem(sender).caption); end;
