BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Help with array of TStream          BorlandTalk.com Forum Index -> Delphi Thirdparty Tools (General) View previous topic :: View next topic   Author Message Andy Guest Posted: Sat Apr 29, 2006 11:03 am    Post subject: Help with array of TStream I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. for Idx:=Low(BmpStreams) to High(BmpStreams) do begin AStream:=TMemoryStream.Create; try Pic:=TPicture.Create; try //this is where the problem happens Pic.Graphic.LoadFromStream(BmpStreams[Idx]); .... finally FreeAndNil(Pic); end; finally FreeAndNil(AStream); end; end; Thanks in advance. Andy Back to top Nicholas Sherlock Guest Posted: Sat Apr 29, 2006 12:03 pm    Post subject: Re: Help with array of TStream Andy wrote: Quote: I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. You need to say what you mean by "Does not execute fine"! Quote: for Idx:=Low(BmpStreams) to High(BmpStreams) do begin AStream:=TMemoryStream.Create; try Pic:=TPicture.Create; try //this is where the problem happens Pic.Graphic.LoadFromStream(BmpStreams[Idx]); You don't show any code which could load anything into the stream. My guess is that you forgot to rewind the stream before trying to load from it: BmpStreams[Idx].Seek(0,soFromBeginning); or: BmpStreams[Idx].Position:=0; (For some reason I prefer the former.. ) Cheers, Nicholas Sherlock -- http://www.sherlocksoftware.org Back to top Frank Soriano Guest Posted: Sat Apr 29, 2006 7:03 pm    Post subject: Re: Help with array of TStream Before this line: Pic.Graphic.LoadFromStream(BmpStreams[Idx]); BmpStream[Idx].Position :=0; will fix your problem. btw, why you need this "AStream:=TMemoryStream.Create;" ? Frank "Andy" <aadiabo (AT) ix (DOT) netcom.com> wrote in message news:44533ad1$1 (AT) newsgroups (DOT) borland.com... Quote: I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. for Idx:=Low(BmpStreams) to High(BmpStreams) do begin AStream:=TMemoryStream.Create; try Pic:=TPicture.Create; try //this is where the problem happens Pic.Graphic.LoadFromStream(BmpStreams[Idx]); .... finally FreeAndNil(Pic); end; finally FreeAndNil(AStream); end; end; Thanks in advance. Andy Back to top Andy Guest Posted: Sat Apr 29, 2006 10:03 pm    Post subject: Re: Help with array of TStream Hi Frank, Thanks so much Frank for replying. I have a strong feeling that this will fix my problem. Thanks again for helping out. Andy "Frank Soriano" <franksoriano (AT) programmer (DOT) net> wrote in message news:4453aa07 (AT) newsgroups (DOT) borland.com... Quote: Before this line: Pic.Graphic.LoadFromStream(BmpStreams[Idx]); BmpStream[Idx].Position :=0; will fix your problem. btw, why you need this "AStream:=TMemoryStream.Create;" ? Frank "Andy" <aadiabo (AT) ix (DOT) netcom.com> wrote in message news:44533ad1$1 (AT) newsgroups (DOT) borland.com... I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. for Idx:=Low(BmpStreams) to High(BmpStreams) do begin AStream:=TMemoryStream.Create; try Pic:=TPicture.Create; try //this is where the problem happens Pic.Graphic.LoadFromStream(BmpStreams[Idx]); .... finally FreeAndNil(Pic); end; finally FreeAndNil(AStream); end; end; Thanks in advance. Andy Back to top Andy Guest Posted: Sat Apr 29, 2006 10:03 pm    Post subject: Re: Help with array of TStream Hi Nicholas, Thanks so much for replying. Sorry I was a little vague on the error. I had madexcept on but it just gave me an AV notification and nothing else. And the ignorance on my part on this didn't help. I will give the modification a try. Chances are I think you are right about the problem. Thanks so much for your help. Andy "Nicholas Sherlock" <N.sherlock (AT) gmail (DOT) com> wrote in message news:44534e43 (AT) newsgroups (DOT) borland.com... Quote: Andy wrote: I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. You need to say what you mean by "Does not execute fine"! for Idx:=Low(BmpStreams) to High(BmpStreams) do begin AStream:=TMemoryStream.Create; try Pic:=TPicture.Create; try //this is where the problem happens Pic.Graphic.LoadFromStream(BmpStreams[Idx]); You don't show any code which could load anything into the stream. My guess is that you forgot to rewind the stream before trying to load from it: BmpStreams[Idx].Seek(0,soFromBeginning); or: BmpStreams[Idx].Position:=0; (For some reason I prefer the former.. ) Cheers, Nicholas Sherlock -- http://www.sherlocksoftware.org Back to top Nicholas Sherlock Guest Posted: Sun Apr 30, 2006 12:03 am    Post subject: Re: Help with array of TStream Andy wrote: Quote: I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. Remember that you have to create the streams that are in the array before you use them. The code you show creates an unnecessary stream. Are you sure that you really need more than one stream? Cheers, Nicholas Sherlock -- http://www.sherlocksoftware.org Back to top Andy Guest Posted: Wed May 03, 2006 8:03 am    Post subject: Re: Help with array of TStream Hi Nicholas, Yes, I am aware of the creation of the streams. The extra stream was for something else in the code. But thanks for giving me the heads up. Andy "Nicholas Sherlock" <N.sherlock (AT) gmail (DOT) com> wrote in message news:4453f8b2$1 (AT) newsgroups (DOT) borland.com... Quote: Andy wrote: I'm having a problem with the following code and I was hoping a good samaritan could help out. I'm not sure you could create an array of TStream this way, but for some reason, it compiles fine but does not execute fine. Remember that you have to create the streams that are in the array before you use them. The code you show creates an unnecessary stream. Are you sure that you really need more than one stream? Cheers, Nicholas Sherlock -- http://www.sherlocksoftware.org Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Thirdparty Tools (General) 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.