BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Numeric or String          BorlandTalk.com Forum Index -> Delphi Databases (Desktop) View previous topic :: View next topic   Author Message Bill Todd (TeamB) Guest Posted: Fri Jan 30, 2004 2:01 pm    Post subject: Re: Numeric or String On Fri, 30 Jan 2004 11:25:21 -0300, "Luiz Fernando" <lfernandosilva (AT) zipmail (DOT) com.br> wrote: Quote: How Can I to know if a variable is numeric or string? The obvious answer is, look at its declaration. What are you trying to do? Your question is not clear. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Luiz Fernando Guest Posted: Fri Jan 30, 2004 2:25 pm    Post subject: Numeric or String Hi... How Can I to know if a variable is numeric or string? thanks Luiz Fernando Back to top Luiz Fernando Guest Posted: Fri Jan 30, 2004 3:02 pm    Post subject: Re: Numeric or String Sorry.... I'd like to know if an value of field database is numeric or string. thanks Luiz Fernando "Bill Todd (TeamB)" <no (AT) no (DOT) com> escreveu na mensagem news:krok105ljaln0roak6f39n0qm5fjlh87m7 (AT) 4ax (DOT) com... Quote: On Fri, 30 Jan 2004 11:25:21 -0300, "Luiz Fernando" [email]lfernandosilva (AT) zipmail (DOT) com.br[/email]> wrote: How Can I to know if a variable is numeric or string? The obvious answer is, look at its declaration. What are you trying to do? Your question is not clear. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Dell Stinnett Guest Posted: Fri Jan 30, 2004 3:49 pm    Post subject: Re: Numeric or String Quote: I'd like to know if an value of field database is numeric or string. Look at the DataType of the field - If MyTable.FieldByName('SomeField').DataType = ftString then //do whatever else if MyTable.FieldByName('SomeField').DataType = ftInteger then // do somthing else If you need to do this prior to opening the table, use the FieldDefs property: MyTable.FieldDefs.Update; //get the field definitions from the table If MyTable.FieldDefs.Items[MyTable.FieldDefs.IndexOf('SomeField')].DataType = ftString then... -Dell Back to top Andrew Guest Posted: Fri Jan 30, 2004 8:06 pm    Post subject: Re: Numeric or String try this function isInteger(s : String) : boolean; var dummyInt : Integer; begin result := true; try dummyInt := StrToInt(s); except result := false; end; end; function isNumeric(s : String) : boolean; var dummyNo : double; begin result := true; try dummyNo := StrTofloat(s); except result := false; end; end; On Fri, 30 Jan 2004 11:25:21 -0300, "Luiz Fernando" <lfernandosilva (AT) zipmail (DOT) com.br> wrote: Quote: Hi... How Can I to know if a variable is numeric or string? thanks Luiz Fernando Back to top Mike Shkolnik Guest Posted: Fri Jan 30, 2004 10:26 pm    Post subject: Re: Numeric or String if youDataset.FieldByName('..') is TNumericField then <this is a numeric> else <string or another data type> -- With best regards, Mike Shkolnik E-mail: [email]mshkolnik (AT) scalabium (DOT) com[/email] WEB: http://www.scalabium.com "Luiz Fernando" <lfernandosilva (AT) zipmail (DOT) com.br> wrote Quote: Sorry.... I'd like to know if an value of field database is numeric or string. thanks Luiz Fernando "Bill Todd (TeamB)" <no (AT) no (DOT) com> escreveu na mensagem news:krok105ljaln0roak6f39n0qm5fjlh87m7 (AT) 4ax (DOT) com... On Fri, 30 Jan 2004 11:25:21 -0300, "Luiz Fernando" [email]lfernandosilva (AT) zipmail (DOT) com.br[/email]> wrote: How Can I to know if a variable is numeric or string? The obvious answer is, look at its declaration. What are you trying to do? Your question is not clear. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Databases (Desktop) 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.