Dialog.Button.Clear not working

[eosventas]

I have a Dialog, in some parts of my program I need it with TWO buttons, and everything is ok

But in some other parts I use the same dialog and use JQOptions.Button.Clear but it does not work, it keeps showing the same two buttons I already define.

I am using CGDevTools V2.5.0.17 beta for IW14.0.36

Because of my bad english I include a sample code to show what I mean

How can I really make those buttons away when I don't need them anymore

[Alexander Bulei]

Hi eosventas,

This happens because you need re-render the dialog.

TCollection's (JQDialogOptions.Buttons) doesn't supports ajax change, so you need call AjaxReRender method.

Almost all properties in JQ<component_name>Options supports changing in asynchronous.

Other thing, you don't need define the AutoOpen property, dialog uses it only on page render.

In your case you need put the AjaxReRender on both procedures:

delphi code

procedure TIWForm1.IWCGJQButton1JQButtonOptionsClick(Sender: TObject;
  AParams: TStringList);
var iButtom: TIWCGJQCustomDialogButton;
begin
	IWCGJQLabel1.Caption := 'This Dialog has TWO buttons';

	with IWCGJQDialog1 do
	begin
		//JQDialogOptions.AutoOpen:= True; // USELESS IN THIS CASE
		JQDialogOptions.Buttons.Clear;
		JQDialogOptions.Title:= 'Any Title';
		JQDialogOptions.Modal:= True;
		Visible:= True;

		iButtom:= JQDialogOptions.Buttons.Add;
		iButtom.Text:= 'first choice';

		iButtom:= JQDialogOptions.Buttons.Add;
		iButtom.Text:= 'second choice';

    // RE-RENDER THE DIALOG
    AjaxReRender(True,False);
	end;
end;

procedure TIWForm1.IWCGJQButton2JQButtonOptionsClick(Sender: TObject;
  AParams: TStringList);
begin
	IWCGJQLabel1.Caption := 'This Dialog should has NO buttons at all because we use JQDialogOptions.Buttons.Clear';

	with IWCGJQDialog1 do
	begin
		//JQDialogOptions.AutoOpen:= True; // USELESS IN THIS CASE
		JQDialogOptions.Buttons.Clear;  //HERE WE CLEAR THE BUTTONS
		JQDialogOptions.Title:= 'Any Title';
		JQDialogOptions.Modal:= True;
		Visible:= True;

    // RE-RENDER THE DIALOG
    AjaxReRender(True,False);
	end;
end;

Best Regards.

[eosventas]

Thank you so much =)

[eosventas]

Additional tip for programmers using the recommendation posted here..........

In certain situations I was having the following error

Error message: Method "RenderRegionAsync" it's only allowed in Ajax Processing!

That is fixed with :

delphi code

uses IWCGJQCommon;

    // RE-RENDER THE DIALOG
    if CGIsCallBackProcessing then
        AjaxReRender(True,False);