Frequently Asked Component Specific Questions
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TAdvSpreadGridUsing the expression parser / evaluator
The expression parser / evaluator of TAdvSpreadGrid, our spreadsheet component , can also be separately used. This expression evaluator is in the unit AdvFormula.
To use it, create an instance of the class TAdvFormula and it can be used in the following way:
var
Fm : TAdvFormula;
R: double;
begin
Fm := TAdvFormula.Create(self);
try
Fm.Expression := ''1+2'';
if Fm.Calc(r) then
showmessage(floattostr(r));
finally
Fm.Free;
end;
var
Fm : TAdvFormula;
R: double;
begin
Fm := TAdvFormula.Create(self);
try
fm.v[0] := 12;
fm.v[1] := 25;
Fm.Expression := ''V0+V1'';
if Fm.Calc(r) then
showmessage(floattostr(r));
finally
Fm.Free;
end;
end;