BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TCheckListBox Items tag          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message JVines Guest Posted: Wed Sep 06, 2006 1:13 am    Post subject: TCheckListBox Items tag What is the best way of attaching an int to each item in a TCheckListBox or anything else that uses TStrings? (I am populating a list box from a database table and would like to associate an index with each item.) Back to top Clayton Arends Guest Posted: Wed Sep 06, 2006 2:12 am    Post subject: Re: TCheckListBox Items tag I use the "Object" member for that. Usually I reinterpret_cast a pointer to my real struct associated with the string but it will work just fine for a numerical value. Strings->AddObject(str, index); - Clayton Back to top JVines Guest Posted: Wed Sep 06, 2006 8:11 am    Post subject: Re: TCheckListBox Items tag This does not work. The item being associated with the string has to be a TObject descendant. I need to be able to associate a simple int value. Back to top JD Guest Posted: Wed Sep 06, 2006 1:40 pm    Post subject: Re: TCheckListBox Items tag JVines <dev_support (AT) phoenixresearch (DOT) biz> wrote: Quote: This does not work. The example that Clayton provided needed some casting but it does work. Quote: The item being associated with the string has to be a TObject descendant. To be more precise, is needs to be a TObject pointer. Quote: I need to be able to associate a simple int value. A pointer is 32 bits as is an int so just cast the int as a TObject* when you set it and cast the TObject* as an int when you get it. For example: set Strings->AddObject( "SomeString", reinterpret_cast<TObject*>(SomeIndex) ); or Strings->Objects[x] = reinterpret_cast<TObject*>( SomeIndex ); get int Index = reinterpret_cast<int>( Strings->Objects[x] ); ~ JD Back to top JVines Guest Posted: Fri Sep 08, 2006 2:58 am    Post subject: Re: TCheckListBox Items tag [c++ Error] File.cpp(#): E2031 Cannot cast from 'Variant' to 'TObject *' When the following line is used: CheckListBox->Items->AddObject(TTable_Tbl->FieldValues["string"], reinterpret_cast<TObject*>(TTable_Tbl->FieldValues["index"]); Note: DataType for "index" is ftAutoInc Back to top Remy Lebeau (TeamB) Guest Posted: Fri Sep 08, 2006 3:02 am    Post subject: Re: TCheckListBox Items tag "JVines" <dev_support (AT) phoenixresearch (DOT) biz> wrote in message news:4500961d$3 (AT) newsgroups (DOT) borland.com... Quote: [c++ Error] File.cpp(#): E2031 Cannot cast from 'Variant' to 'TObject *' When the following line is used: CheckListBox->Items->AddObject(TTable_Tbl->FieldValues["string"], reinterpret_cast<TObject*>(TTable_Tbl->FieldValues["index"]); The FieldValues[] property uses a Variant. You cannot store that into the TStrings::Objects[] property directly. Quote: Note: DataType for "index" is ftAutoInc ftAutoInc is a 32-bit integer value, so simply store the value of the FieldValues[] property into an 'int' variable, and then store that into the Objects[] property, ie: int index = TTable_Tbl->FieldValues["index"]; CheckListBox->Items->AddObject(TTable_Tbl->FieldValues["string"], reinterpret_cast<TObject*>(index)); Gambit Back to top DreamChaser Guest Posted: Wed Feb 28, 2007 8:28 am    Post subject: Re: TCheckListBox Items tag Quote: When the following line is used: CheckListBox->Items->AddObject(TTable_Tbl->FieldValues["string"], You could change this part reinterpret_cast<TObject*>(TTable_Tbl->FieldValues["index"]); to: reinterpret_cast<TObject*>(TTable_Tbl->FieldByName("index")->AsInteger); I believe :) DC Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.