受け入れられた答えは正しいですが、この方法でのキャッシュには機能しません。私は両方のバリアントを組み合わせました:
部分ビューとページのメソッドの最小値GetVaryByCustomString
に設定します。実際には最初の方法しか使用できませんが、2 番目の方法はそれほど高価ではないように見えます。毎回呼び出すのではなく、登録済みのハンドラーのみを呼び出します。Duration
AddValidationCallback
OnResultExecuting
したがって、カスタム キャッシュ属性クラス
public class CacheAttribute : OutputCacheAttribute
{
public CacheAttribute()
{
Duration = 300; /*default cache time*/
}
private bool _partialView;
/// <summary>
/// Set true if Partial view is cached
/// </summary>
public bool PartialView
{
get { return _partialView; }
set
{
_partialView = value;
if ( _partialView ) {
VaryByCustom = "Auth";
}
}
}
public override void OnResultExecuting(ResultExecutingContext filterContext)
{
if ( PartialView ) OnCachePartialEnabled( filterContext );
else OnCacheEnabled(filterContext);
base.OnResultExecuting( filterContext );
}
private OutputCacheLocation? originalLocation;
private int? _prevDuration;
protected void OnCachePartialEnabled(ResultExecutingContext filterContext)
{
var httpContext = filterContext.HttpContext;
if ( !_prevDuration.HasValue) _prevDuration = Duration;
Duration = httpContext.User.Identity.IsAuthenticated ? 1 : _prevDuration.Value;
}
protected void OnCacheEnabled(ResultExecutingContext filterContext)
{
var httpContext = filterContext.HttpContext;
if ( httpContext.User.Identity.IsAuthenticated ) {
// it's crucial not to cache Authenticated content
originalLocation = originalLocation ?? Location;
Location = OutputCacheLocation.None;
}
else {
Location = originalLocation ?? Location;
}
// this smells a little but it works
httpContext.Response.Cache.AddValidationCallback( IgnoreAuthenticated, null );
}
// This method is called each time when cached page is going to be
// served and ensures that cache is ignored for authenticated users.
private void IgnoreAuthenticated(HttpContext context, object data, ref HttpValidationStatus validationStatus)
{
validationStatus = context.User.Identity.IsAuthenticated
? HttpValidationStatus.IgnoreThisRequest
: HttpValidationStatus.Valid;
}
}
Global.asax.cs の GetVaryByCustomString メソッドをオーバーライドする
public override string GetVaryByCustomString(HttpContext context, string custom)
{
if ( custom == "Auth" ) {
//do not cache when user is authenticated
if ( context.User.Identity.IsAuthenticated ) {
return base.GetVaryByCustomString( context, custom );
}
return "NotAuth";
}
return base.GetVaryByCustomString( context, custom );
}
次のように使用します。
[Cache]
public virtual ActionResult Index()
{
return PartialView();
}
[ChildActionOnly, Cache(PartialView=true)]
public virtual ActionResult IndexPartial()
{
return PartialView();
}
更新: Fujiy の修正もここに追加しました