Devart Forums

Settings are following:
ODAC 5.55.0.21
Delphi 7.1
OraSession Options (Net = False, UseUnicode = True)
TntUnicodeControls for display Unicode (download from http://www.tntware.com/delphicontrols/u ... nloads.htm)

I created the CalcFields in Design-Time with calsFieldTest : TWideStringField.
The OraTable1 contains "wStr" WideString Field, "calsFieldTest" is CalcFields.

procedure TForm1.OraTable1CalcFields(DataSet: TDataSet);
begin
DataSet.FieldByName ('calsFieldTest').Value := DataSet.FieldByName ('wStr').Value;
end;

The Result fail to display wStr Value in the calsFieldTest CalsField.

By the way, the above also appear in displaying widestring lookup field in table.

You cannot use TWideStringFields as lookup field due to the realization of
TWideStringFields in DB.pas. TWideStringField allocates only 4 bytes for lookup record buffer.
Please see realization of TWideStringField.GetDataSize and TWideStringField.SetAsWideString

Then how about the CalsField store the widestring value?
Is it the same problem??

Calculated fields use the buffer which is same for lookup fields. And it is too small for TWideStringField.

OK. If I want to display some unicode word (portuguese) to calsfields, but I can not use TWideStringField to store it, Then how to display the unicode word?
If I use TStringField to store, I will lose the some unicode word (portuguese).