modalpopupextender only centers on resize

The RadListBox has an internal logic on item click to determine if the item was already selected. RdListView_Chart.DataSource = LoadCassetteForFoodChart(iResultID) ĭotnet-csharp dotnet-aspnet-general dotnet-entity-framework-core Int iResultID = Convert.ToInt32(lboxTestedMachines.SelectedValue) I've tried just about everything, but the click/selection of a list item in the RadListBox immediately shows the Modal and I can't seem to get before/inbetween the Modal showing to do any type of selected item checking to see if its the same item as before, and if so, then to do nothing or issue a Hide on the Modal.Īnd here is my ASPX.CS code protected void lboxTestedMachines_SelectedIndexChanged(object sender, EventArgs e) The problem I'm having is if the same list item is selected again, the Modal popup shows again, but never goes away. The Modal does Hide when the loading is completed.

I have a ModalPopupExtender tied to a Telerik RadListBox so that when an item is selected from the list box, I need a 'Please Wait' message while the page behind loads the data into Telerik RadCharts.

Modalpopupextender only centers on resize