In the db, did Embarcadero removed the dbExcept?
Was it removed or replaced?
What could replace it?
That unit and the code it contains has gone. But it doesn't look as if it actually did anything. I suspect it was vestigial code that had long ceased being used but was left in place. The code in that unit was not referred to by any other source code unit supplied with Delphi.
I expect you have a stray DbExcept in your uses clause that can simply be removed.
It seems to be part of Borland Database Engine (BDE), which is deprecated. Is it installed?
Related
I found a workaround for a bug (QC#25702) in the Delphi VCL unit Grids.pas, so I copied that file to my project's source folder, added it to the project and changed a few lines of code. That was with Delphi 2007, and everything worked as expected.
Now, with Delphi XE2, the project no longer compiles. It complains about incompatible types "TCustomGrid" and "TdzVirtualStringGrid" (which is a descendant of TCustomGrid). It turns out that one unit refers to TCustomGrid as declared in my copy of Grids.pas, the other to TCustomGrid as declared in Vcl.Grids.pas. This happens even though both units have "Grids" in their uses clause (rather than Vcl.Grids). Any idea how I could solve this?
Your problem is that you are including the Delphi 2007 Grids unit in your XE2 project. That won't work at all. What you need to do to modify an RTL/VCL unit in this way is as follows:
Start with the source code for the unit supplied with the Delphi version that you are using. In this case start with Vcl.Grids.pas supplied with XE2.
Make a copy of that unit inside your project directory, and add that unit to your project.
Make any modifications to the implementation section of the copied unit.
I have problem to build my project. I am using delphi 2010.
when i try to build my project this error shows up. "F1026 File not found: 'System.Action.dcu'
I've tried to find solution for this error, but i can't find anything that really fix this.
any idea?
First of all, I am going to assume that the error message actually refers to System.Actions.dcu (as per the question title) rather than System.Action.dcu (as per the question body). It's always best to use copy/paste error messages so that they are transferred verbatim.
You are using code written to target a later version of Delphi. Not only does Delphi 2010 not have unit scope names, i.e. System.<unitname>, but it does not have the Actions unit. If memory serves correctly, unit scope names arrived in XE2 and the Actions unit in XE3.
The code you are compiling has a unit the uses System.Actions. Find that unit and work out where it came from. Then you'll need to work out how to proceed. Can you get a version of code that supports your older Delphi version? Can you port the code to your Delphi version? Can you find an alternative library? Only you can answer those questions, I'm afraid. We cannot give advice at the moment since we do not know anything about the code that is causing you problems.
i have this problem; i need call filectrl unit in a my unit. Of course, i do: uses filectrl in interface section but it not is detected. I have tried too with system.filectrl but not found too this.
I have searched in help (online and local) but there is wrote that unit is correct. I use delphi xe2, too you have same problem? Have solved it? If yes as you done?
Thanks very much.
The full name of this unit in Delphi XE2 is:
uses VCL.FileCtrl;
The scoped name you need is Vcl.FileCtrl.
You can either use Vcl.FileCtrl, as others have already written, or you can add Vcl to the Namespace prefixes in the project options. The ellipsis button for that shows an editor for such prefixes. To be like XE, you can e.g. add System, Vcl and Winapi as prefix.
But I would only do the latter (Namespace prefixes) if I were using old code.
I am upgrading from Delphi 6 to Delphi XE. In Delphi 6 I was using HTML help files (.chm) and used the StoHtmlHelp to make it so that I could call context sensitive help like we used to call .hlp files. I'm upgrading to Delphi XE so I need to use that native HTML help support.
I know I'm supposed to add HTMLHelpViewer to the uses clause of the project, but when I do I get a compiler warning that it couldn't find the file.
Could not compile used unit 'HTMLHelpViewer.pas'
Does anyone know why Delphi isn't finding this file by default? It should be built in.
Not being able to compile a file and not finding a file arent't the same thing. If Delphi is trying to compile HTMLHelpViewer.pas you must either:
have the vcl source folder(s) on your library path (not recommended), or
another HTMLHelpViewer.pas file is somewhere on your library path, that path comes before the standard Delphi lib folder, and that HTMLHelpViewer.pas file contains something that Delphi XE is not happy about.
The first is not likely and it would be very strange indeed if Delphi could not compile one of its units (apart from system.pas).
The second seems more likely... And if that unit used to compile, the complaints from Delphi XE could well be due to differences between Delphi 6 and Delphi XE.
You don't actually need to add it the uses clause of the .dpr file – you just need to use it from some unit in your project.
Having said that, you may actually prefer to add it to your .dpr file, and if so then do it like this:
uses
Forms,
HtmlHelpViewer,
MyUnit in 'MyUnit.pas',
I'm guessing that you have something like this:
uses
Forms,
HtmlHelpViewer in 'C:\Program Files\Borland\Delphi6\Source\VCL\HtmlHelpViewer.pas',
MyUnit in 'MyUnit.pas',
This will fail because you are asking XE to compile D6 source.
For RTL/VCL units its best to omit the path to the file and let the compiler find it (it knows where to look).
In this question (link) it was said that the line below (in each unit) would remove as much RTTI as possible:
{$RTTI EXPLICIT METHODS([]) PROPERTIES([]) FIELDS([])}
The posting didn't mention what Delphi version it works with, but I assume D2010. However, when I include the line above, I get this error:
DCC Fatal Error: E2158 System unit out of date or corrupted:
missing TVisibilityClasses.
I'm using a "stock" version of D2010 and have never done anything that I'm aware of that would change the default installation or the libraries.
Any suggestions? TIA
Related question: link.
Make sure you put the "{$RTTI" line below the "unit unit1;" line.
Note that as of XE5 and newer, this directive needs to be in each individual unit for which you want to disable RTTI. Before that (as in comments, which applies only to XE4 and below) it could be in the DPR file and would apply to all units in the project.
The new RTTI is for Delphi 2010 and up.
It can be removed, but then lots of things will have limited functionality (like JSON conversion, part of DataSnap and many of the newer 3rd party libraries that do ORM or other mappings).
Things depending on TValue are gone anyway.
"old style" RTTI (which was introduced in Delphi 1 and is still present in Delphi 2010) cannot be removed.
So: it is recommended to remove RTTI only from your own units, and not from the RTL and VCL.
--jeroen