BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  File Open with Common Dialog Box Problem with Cancel          BorlandTalk.com Forum Index -> C++ Builder (Language C++) View previous topic :: View next topic   Author Message Del Ventruella Guest Posted: Fri Jun 10, 2005 2:53 am    Post subject: File Open with Common Dialog Box Problem with Cancel When I open a file using the Common Dialog Box, if I select the cancel option, my code still tries to open the file. The code begins with: OpenDialog1->Execute(); The remaining lines translate the contents of a file into user readable information on a form. No problems with that, but it is clear that selecting CANCEL in the file open dialog box doesn't stop the execution of subsequent code after the line shown. My problem is how to recognize the "CANCEL" selection after "OpenDialog1->Execute();" if a file is not selected. I don't want to try to read data that hasn't been loaded if no file is selected to be opened and "CANCEL" is instead selected. I recall seeing something like "OnCancelExecute()" in other code but don't know how to come up with the precise way to code this. Thanks for your help with this in advance. Back to top Jonathan Benedicto Guest Posted: Fri Jun 10, 2005 3:01 am    Post subject: Re: File Open with Common Dialog Box Problem with Cancel "Del Ventruella" <ventruella (AT) hotmail (DOT) com> wrote Quote: When I open a file using the Common Dialog Box, if I select the cancel option, my code still tries to open the file. The code begins with: OpenDialog1->Execute(); The remaining lines translate the contents of a file into user readable information on a form. No problems with that, but it is clear that selecting CANCEL in the file open dialog box doesn't stop the execution of subsequent code after the line shown. My problem is how to recognize the "CANCEL" selection after "OpenDialog1->Execute();" if a file is not selected. I don't want to try to read data that hasn't been loaded if no file is selected to be opened and "CANCEL" is instead selected. I recall seeing something like "OnCancelExecute()" in other code but don't know how to come up with the precise way to code this. Thanks for your help with this in advance. OpenDialog1->Execute() returns a boolean value indicating whether the user clicked OK or Cancel. So use something like this: if( OpenDialog1->Execute() ) { // OK was clicked. } HTH Jonathan Back to top Del Ventruella Guest Posted: Fri Jun 10, 2005 4:08 pm    Post subject: Re: File Open with Common Dialog Box Problem with Cancel "Del Ventruella" <ventruella (AT) hotmail (DOT) com> wrote: Quote: When I open a file using the Common Dialog Box, if I select the cancel option, my code still tries to open the file. The code begins with: OpenDialog1->Execute(); The remaining lines translate the contents of a file into user readable information on a form. No problems with that, but it is clear that selecting CANCEL in the file open dialog box doesn't stop the execution of subsequent code after the line shown. My problem is how to recognize the "CANCEL" selection after "OpenDialog1->Execute();" if a file is not selected. I don't want to try to read data that hasn't been loaded if no file is selected to be opened and "CANCEL" is instead selected. I recall seeing something like "OnCancelExecute()" in other code but don't know how to come up with the precise way to code this. Thanks for your help with this in advance. I tried to embed the file open code inside the brackets of the conditional statement previously suggested. In response, clicking on "CANCEL" once within the open dialog causes the open dialog to be displayed again. Clicking "CANCEL" twice causes the open dialog to close. Does anyone know the reason for this behavior? No command to open the open dialog box is contained within the code inside the brackets. Thanks once again. Back to top Jonathan Benedicto Guest Posted: Fri Jun 10, 2005 4:11 pm    Post subject: Re: File Open with Common Dialog Box Problem with Cancel "Del Ventruella" <ventruella (AT) hotmail (DOT) com> wrote Quote: I tried to embed the file open code inside the brackets of the conditional statement previously suggested. In response, clicking on "CANCEL" once within the open dialog causes the open dialog to be displayed again. Clicking "CANCEL" twice causes the open dialog to close. Does anyone know the reason for this behavior? No command to open the open dialog box is contained within the code inside the brackets. Does your code look like this: OpenDialog1->Execute(); if( OpenDialog1->Execute() ) { ... } If it does, you need to remove the first call to Execute. You don't want to execute the dialog twice. HTH Jonathan Back to top Del Ventruella Guest Posted: Fri Jun 10, 2005 8:56 pm    Post subject: Re: File Open with Common Dialog Box Problem with Cancel "Jonathan Benedicto" <incorrect (AT) no (DOT) server> wrote: Quote: "Del Ventruella" <ventruella (AT) hotmail (DOT) com> wrote in message news:42a9bae2$1 (AT) newsgroups (DOT) borland.com... I tried to embed the file open code inside the brackets of the conditional statement previously suggested. In response, clicking on "CANCEL" once within the open dialog causes the open dialog to be displayed again. Clicking "CANCEL" twice causes the open dialog to close. Does anyone know the reason for this behavior? No command to open the open dialog box is contained within the code inside the brackets. Does your code look like this: OpenDialog1->Execute(); if( OpenDialog1->Execute() ) { ... } If it does, you need to remove the first call to Execute. You don't want to execute the dialog twice. HTH Jonathan No, that's not the problem. I got it to work by finding the code you embedded inside the conditional statement's brackets in your last response within Borland's help files, and using it merely to get the file name. I then test to see if the variable to which the file name is assigned is a null character. If not, my code uses the file name received to open the file. If no name is returned, it does nothing. Now it works to open a file, and there is no ambiguity if "cancel" is selected. Thanks for trying to help out. It got me thinking and moving toward a solution again, which represented a form of help in itself. 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 (Language C++) 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.