Prevent Closing container

Hello, Pierre-jean,

RadPopupEditor offers the PopupClosing event which is triggered right before the associated RadPopupContainer closes. Through its arguments, it is allowed to cancel closing the container. Thus, you can raise a flag and cancel the event if needed. Please refer to the code snippet below:

bool flag = true; 
this.radPopupEditor1.PopupClosing += this.RadPopupEditor1_PopupClosing;
private void RadPopupEditor1_PopupClosing(object sender, RadPopupClosingEventArgs args)
{
    if (flag)
    {
        args.Cancel = true;
    }
    
}

I hope this helps. Should you have other questions do not hesitate to ask.

Regards,
Nadya
Progress Telerik

OK 

got it

Thanks a lot for the recommendation

Pierre-Jean