程序运行过程中直接配置数据源

    技术2022-05-11  33

    name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-3528650120430763&dt=1183890684015&lmt=1183890684&format=468x60_as&output=html&correlator=1183890684000&url=http://gmai9999.googlepages.com/home&ad_type=text_image&ui=rc:0&cc=100&flash=9&u_h=768&u_w=1024&u_ah=738&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="468" scrolling="no" height="60" allowtransparency="allowtransparency"> 方法一:procedure TForm1.Button1Click(Sender: TObject);varmdb:string;beginmdb:='Provider=Microsoft.Jet.OLEDB.4.0;Data Source=%s;Persist Security Info=False;';if opendialog1.Execute then

    adoquery1.Connected:=FALSE;adoquery1.ConnectionString:= Format(Mdb,[DBOP.FileName]);  if  opendialog1.FileName<>'' then    begin    adoquery1.LoginPrompt:=FALSE;    adoquery1.Connected:=TRUE;    end  else    begin    showmessage('数据库没有连接,请重新连接');    opendialog1.Execute;    EXIT;  END;  if not adoquery1.Connected then begin    Application.MessageBox('数据库文件无法打开','错误', MB_OK+ MB_ICONINFORMATION);    Exit;end;

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    方法二:USE ADOANED;

    beginadoconnection1.connected:= false;if editconnectionstring(adoconnection1) then   Try   begin     adoconnection1.connected:=true;     adoconnection1.keepconnection:=true;     adoconnection1.loginprompt:=false;   end   except     Application.Terminate ;   end;end;  name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-3528650120430763&dt=1183890684015&lmt=1183890684&format=468x60_as&output=html&correlator=1183890684000&url=http://gmai9999.googlepages.com/home&ad_type=text_image&ui=rc:0&cc=100&flash=9&u_h=768&u_w=1024&u_ah=738&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="468" scrolling="no" height="60" allowtransparency="allowtransparency"> 


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