<UpdatePanel /> see here: https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.updatepanel?view=netframework-4.8 https://docs.microsoft.com/en-us/dotnet/ap

<UpdatePanel /> see here: https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.updatepanel?view=netframework-4.8 https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.up... I used it 13 years ago. It was fancy.