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Hello, Jean-Marc,
Indeed, the PopupClosing event is the appropriate way to prevent closing the popup in certain conditions. Indeed, the new value is committed when the popup is closed.
However, I can suggest you to handle the Popup.MouseDown event and detect which item was clicked and use this information in the PopupClosing event. Please refer to the following code snippet:
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
Indeed, the PopupClosing event is the appropriate way to prevent closing the popup in certain conditions. Indeed, the new value is committed when the popup is closed.
However, I can suggest you to handle the Popup.MouseDown event and detect which item was clicked and use this information in the PopupClosing event. Please refer to the following code snippet:
bool cancel = false;public RadForm1(){ InitializeComponent(); this.radDropDownList1.PopupClosing += radDropDownList1_PopupClosing; this.radDropDownList1.PopupOpened += radDropDownList1_PopupOpened; this.radDropDownList1.Popup.MouseDown += Popup_MouseDown;}private void Popup_MouseDown(object sender, MouseEventArgs e){ RadListVisualItem visualItem = this.radDropDownList1.Popup.ElementTree.GetElementAtPoint(e.Location) as RadListVisualItem; if (visualItem != null && visualItem.Data.Text.Contains("4")) { cancel = true; } else { cancel = false; }}private void radDropDownList1_PopupOpened(object sender, EventArgs e){ cancel = false;}private void radDropDownList1_PopupClosing(object sender, Telerik.WinControls.UI.RadPopupClosingEventArgs args){ args.Cancel = cancel; }I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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