Problem with first value

[Joelzim]

I am creating a dropdown with the following.

If I have any items in the drop down the first value is always selected. I need to allow the user to not select anything or somehow display a blank value when it is not selected. The Allow clear does not seem to work.

lCb := TIWCGJQDropDown.Create(aComponentOwner);
lCb.Parent := aComponentParent;
lCb.Name := 'dynmcompDlgMstrUDF0';
lCb.Visible := True;
lCb.Enabled := True;
lCb.JQDropDownOptions.Multiple := False;
lCb.JQDropDownOptions.AllowClear := True;
lCb.DataLink.DataSource := aMstrDS;
lCb.DataLink.FieldName := 'SHORT_DESC';
lCb.Height := h_size;
lCb.Width := w_size;
lCb.Top := top_pos;
lCb.Left := left_pos_comp;
lCb.ZIndex := z_indx;
lStrList := TStringList.Create;
try
lStrList.Delimiter := ';';
lStrList.DelimitedText := FieldbyName('SHORT_VAL').AsString;
fxStrListToCGDropDownList(lStrList,lCB);
finally
lStrList.Free;
end;

[Joelzim]

I tried JQDropDownOptions.Placeholder := ' '; from another post but it does not work either.

[Joelzim]

If I add

with lCb.items.add do
begin
Caption := '';
value := '';
end;

Then it will kinda give me a blank value. I am not sure how to achieve a blank value

[Joelzim]

I think I got it working with the following.

lCb.JQDropDownOptions.Placeholder := '-- No Selection --';

However, there is one thing that does not quite work as expected with the following senario

If you have a value in the database and the dropdown is connected to a certain field, then when you edit the record the allowclear x is not seen. You have to select the dropdown value again before you see the x and can clear out the dropdown and set it back to blank.

[Joelzim]

Now I have one more issue.

The values that are selected in the dropdown box are saved in the database but when you try to reedit the record the dropdown does not show what is already selected in the database.

Do i need to do something like the following? I would think not since the dropdown is data aware.


lCb.Val := aMstrDS.DataTable.fieldbyname('FLAG_LIST').asstring;

[Alexander Bulei]

Hi Joelzim,

Please send us the simple testcase project.
TIA

Best Regards,

[Joelzim]

I got it working by setting

lCb.JQDropDownOptions.Placeholder := '-- No Selection --'

after I populated the options in the dropdown. (not before)