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Cannot Assign A Nil To A Tstringlist

My component is derive >from TComponent. Martin Djern? But unlike to variables in object-scope, uninitialized doesn't implies that it is nil. Just create your StringList and everything is fine. Source

FLines: TStrings; . TStrings is basically an abstract ancestor class for various kinds of string storage and creates no storage on its own. What did I do wrong or what should I do to correct this problem? I'm not sure how you're getting that particular error which sounds kind of bogus; however, there are a couple of problems with your code (see below). http://stackoverflow.com/questions/8007807/tstringlist-local-variable-not-initialized-to-nil-why

een andere klasse, TMemoStrings. UilLogica is ver te zoeken Crime Scene Investigation::nice artPagina: 1ReageerForumDevschuur®Programming[Delphi] TStrings property van component wordt niet gezet Nintendo Switch Google Pixel Sony PlayStation VR Planet Coaster Apple iPhone 7 Dishonored 2 Zin in een uitdaging (ja echt!)? Does anyone know how to assign a nil to tStrings??

Here's what happening. declare a property of the type TStrings, read part FLines; write part SetLines! 3. So use TStringList instead TStrings. I inserted the code needed and I works fine, I see my property in the Object editor, but I can't edit the property.

FvalidList is al geïnstantieerd (je hebt een object gecreëerd), bijvoorbeeld met FvalidList := TStringList.Create; TStrings is een abstracte klasse, dus je moet een descendant van TStrings instantiëren en niet TStrings zelf. Posts [ 4 ] Pages 1 You must login or register to post a reply Programmer's Town »Delphi & Builder »cannot assign a nil to a TMemoStrings Jump to forum: .NET What did John Templeton mean when he said that the four most dangerous words in investing are: ‘this time it’s different'? Presumably the additional functionality found in TStringList offsets the advantage of the more intelligent algorithm.

Since advanced records don't support inheritance protected visibility doesn't have any meaning. Igor Ivano Delphi Developer Sat, 09 Aug 2003 15:03:13 GMT Re:Cannot assign a nil to a TComboBox strings error Quote> Ronan, > i would rather pass TStrings object to the procedure When the application exits, the FastMM memory manager will detect that the 'two' string has been leaked and will display a warning message. Not the answer you're looking for?

I'm wrtting a component and in that component I would like to put a TStrings field. Source What's wrong with this program? C++: can I hint the optimizer by giving the range of an integer? Can anyone tell me what's wrong? 9.

Instead, define it as a TStrings and don't change any of your other code. http://electrictricycle.net/cannot-assign/cannot-assign-a-nil-to-a.html You have to consider working directly over the List and not use a TempList, like this: procedure TestOne(List : TStringList); begin List.Clear; List.Add('Test'); end; procedure TForm1.Button1Click(Sender : TObject); var aList : up vote 6 down vote favorite The first procedure : procedure TestOne(List : TStringList); var TempList : TStringList; begin TempList := TStringList.Create; TempList.Add('Test'); List := TempList; TempList.Free; end; procedure TForm1.Button1Click(Sender : Join them; it only takes a minute: Sign up TStringList local variable not initialized to nil - why?

Ga verder Meer informatie ForumDevschuur®Programming[Delphi] TStrings property van component wordt niet gezet[Delphi] TStrings property van component wordt niet gezetPagina: 1Acties: Reageerwoensdag 05 februari 2003 12:36Acties: 0Henk 'm!porn*Registratie: januari 2001Laatst online: 04-11 Teenage daughter refusing to go to school On verses, from major Hindu texts, similar in purport with the verses and messages found in the Bhagawat Gita Depalindromize this string! Normally it is an automatic thing. have a peek here You set > up a > list of strings here, and those strings appear as TLabels inside the > group > box. > I've done all the work to get the

Browse other questions tagged delphi tstringlist or ask your own question. Locals doesn't - it's simply have garbage there (maybe even nil, but don't count on it). –Fabricio Araujo Nov 4 '11 at 15:26 @FabricioAraujo OK ! –philnext Nov 4 You set up a > list of strings here, and those strings appear as TLabels inside the group > box. > I've done all the work to get the TLabels displayed

Field Update, Get Fields, Add Fields? 2.

When you want to create object type, you muto to this: FLines:=TStringList.Create You satement creates new instance of objecy, but it is NOT assigned to any variable. ;-) FValidList is een object, die moet je natuurlijk wel instantieren (aanmaken, create..)Creepy wijzigde deze reactie 05-02-2003 12:43 (8%)Gezocht: Linux beheerder met kennis van Debian, KVM en netwerken. You need to call the constructor and destructor for a class based property, unlike the standard types. Browse other questions tagged delphi delphi-7 tstringlist or ask your own question.

Are “Referendum” and “Plebiscite” the same in the meaning, or different in the meaning and nuance? I'm wrtting a component and in that >component I would like to put a TStrings field. Assign NIL to a field from TDBLookupComboBox 9. http://electrictricycle.net/cannot-assign/cannot-assign.html Conclusion Using advanced records to implement a replacement for TStringList allows us to eliminate the housekeeping code associated with a TStringList.

When you define an object variable (sVariable) it doesn't get initialized, that you have to do with the Create constructor. The error > >generated when I try to edit this property is "Cannot assign a nil to a My guess is that you do not return a valid TString (or TStringList) Success! In code: type TSampleComponent = class(TComponent) private { Private declarations } FLines: TStrings; procedure SetLines (const AStrings: TStrings); protected {

Is there a wage gap between smokers and non-smokers? Create;2. delphi delphi-7 tstringlist share|improve this question edited Dec 15 '11 at 19:01 menjaraz 5,76242565 asked Nov 4 '11 at 10:23 CyprUS 1,69062870 The problem is probably not in the