在回调期间永远不会保存ViewState

Question

我在这里尝试做的是从客户端调用一个函数，它将调用“RaiseCallbackEvent”，我试图将参数（从客户端）存储到viewstate中。然而，在回调期间从不保存viewState，为什么？

        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不适用于javascript;但是，缓存是。