Can filters be executed for particular methods and not for others?

Yes, you can create action filter attributes and the filter will run only for the methods that are decorated with the filter attribute.

example

public class AdminFilter:ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
bool isAdmin=Convert.ToBoolean(filterContext.HttpContext.Session["IsAdmin"]);
string ReturnUrl=null;
if(!isAdmin){
filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary{{ "controller", "Home" },
{ "action", "Login" } ,{"ReturnUrl",
filterContext.HttpContext.Request.Url.GetComponents(UriComponents.PathAndQuery, UriFormat.SafeUnescaped)}
});
ReturnUrl = filterContext.HttpContext.Request.Url.GetComponents(UriComponents.PathAndQuery, UriFormat.SafeUnescaped);
}
}
}
}

for detailed answer visit my article on this

https://www.sharpencode.com/article/MVC/filters-in-asp-net-mvc/actionfilter

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