The drop down-list works fine but I cannot find the right syntax for the onchange element. I've tried different variations of what's depicted above but non seem to work. For context, in the associated model page (APR.cshtml.cs) I have a function called ChangeServer which I want to change the values of a different drop-down list in my form when a different selection is made for the drop-down list above.
Any guidance would be greatly appreciated. I feel like I'm missing something significant and I've googled a lot but haven't found the right resource