Is there any attribute relating to AJAX to be set for ASP.NET MVC controller actions?

Question

I want to use partial views with AJAX calls in ASP.NET MVC, and this is the first time I\'m using it. I just searched to see if there is anything special I should know befor

Answer 1

For those looking for a .NET Core solution it's a little bit more involved, as IsAjaxRequest() is no longer available.

Below is the code I've used in production on several projects to great effect.

public class AjaxOnlyAttribute : ActionMethodSelectorAttribute
{
  public override bool IsValidForRequest(RouteContext routeContext, ActionDescriptor actionDescriptor)
  {
    if(routeContext.HttpContext.Request.Headers != null &&
      routeContext.HttpContext.Request.Headers.ContainsKey("X-Requested-With") &&
      routeContext.HttpContext.Request.Headers.TryGetValue("X-Requested-With", out StringValues requestedWithHeader))
    {
      if(requestedWithHeader.Contains("XMLHttpRequest"))
      {
        return true;
      }
    }

    return false;
  }
}