ViewState從未在回調期間保存

Question

我在這裏要做的是從客戶端調用一個函數，該函數將調用「RaiseCallbackEvent」，並試圖將參數（從客戶端）存儲到視圖狀態中。然而，viewState在回調期間從未被保存，爲什麼？

 public partial class _Default : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler 
     .... 
     protected void Page_Load(object sender, EventArgs e) 
     { 

     ClientScriptManager cm = Page.ClientScript; 
     String cbReference = cm.GetCallbackEventReference(this, "arg", 
      "ReceiveServerData", ""); 
     String callbackScript = "function CallServer(arg, context) {" + 
      cbReference + "; }"; 
     cm.RegisterClientScriptBlock(this.GetType(), 
      "CallServer", callbackScript, true); 
     } 
     ..... 
     public void RaiseCallbackEvent(String eventArgument) 
     { 
      ViewState["attribute"] = eventArgument; 
     } 
     ..... 

Answer 1

ViewState不適用於JavaScript;然而，緩存是。