Firstly please change in javasript code:
$(function() {
$('#InfoButton').on("click", function() {
$.get('<%= Url.Action("InfoAction", "HardwareRequisition")%>', function (data) {
$( "#myContentView" ).html( data );
});
});
$('#NotesButton').on("click", function() {
$.get('<%= Url.Action("NotesAction", "HardwareRequisition")%>', function (data) {
$( "#myContentView" ).html( data );
});
});
$('#OrdersButton').on("click", function() {
$.get('<%= Url.Action("OrdersAction", "HardwareRequisition")%>', function (data) {
$( "#myContentView" ).html( data );
});
});
});
Secondly please go through below link that might help you:
Sending PartialView Through jQuery Ajax Request In ASP.NET MVC[
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