I'm a newbie programmer. I need to use Delphi's in
operator in C++ Builder XE like this:
if (dgColLines in DBGrid->Options)
// include vertical lines in total (one per column)
TotalColumnWidth = TotalColumnWidth + ColumnCount;
if (dgColLines **in** DBGrid->Options)
How to do that in C++ Builder?
Thanks in advance.
Use the Contains
method to check if a set contains a specific element:
if( DBGrid->Options.Contains(dgColLines) )
TotalColumnWidth = TotalColumnWidth + ColumnCount;
Looking the the property in question, TDBGrid.Options
, its type is TDBGridOptions
which is defined as:
typedef System::Set<TDBGridOption, TDBGridOption::dgEditing,
TDBGridOption::dgTitleHotTrack> TDBGridOptions;
As you can see, C++ Builder uses the template System::Set<T, minEl, maxEl>
to emulate Delphi set types.
All of the functionality available using the built in Delphi set operators is exposed through the methods of Set
. Specifically to this question, set membership is testing using Contains()
.
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