Control.LoadViewState(Object) 方法


SaveViewState() 方法所儲存的先前頁面要求來還原檢視狀態資訊。Restores view-state information from a previous page request that was saved by the SaveViewState() method.

 virtual void LoadViewState(System::Object ^ savedState);
protected virtual void LoadViewState (object savedState);
abstract member LoadViewState : obj -> unit
override this.LoadViewState : obj -> unit
Protected Overridable Sub LoadViewState (savedState As Object)



Object,代表所要還原的控制項狀態。An Object that represents the control state to be restored.


下列範例會覆寫 LoadViewState 自訂 ASP.NET 伺服器控制項的方法。The following example overrides the LoadViewState method for a custom ASP.NET server control. 它會建立 Object 陣列以包含參數中所傳遞的檢視狀態資訊 savedState ,然後 LoadViewState 針對陣列的第一個索引位置呼叫方法的基底實作為。It creates an Object array to contain the view state information passed in the savedState parameter, and then calls the base implementation of the LoadViewState method for the first index location of the array. 它會將儲存在接下來兩個索引位置的值,分別指派給名為和的變數 UserText PasswordTextIt assigns the values stored at the next two index locations to variables named UserText and PasswordText, respectively.

protected override void LoadViewState(object savedState) 
   if (savedState != null)
      // Load State from the array of objects that was saved at ;
      // SavedViewState.
      object[] myState = (object[])savedState;
      if (myState[0] != null)
      if (myState[1] != null)
         UserText = (string)myState[1];
      if (myState[2] != null)
         PasswordText = (string)myState[2];
Protected Overrides Sub LoadViewState(savedState As Object)
   If Not (savedState Is Nothing) Then
      ' Load State from the array of objects that was saved at ;
      ' SavedViewState.
      Dim myState As Object() = CType(savedState, Object())
      If Not (myState(0) Is Nothing) Then
      End If
      If Not (myState(1) Is Nothing) Then
         UserText = CStr(myState(1))
      End If
      If Not (myState(2) Is Nothing) Then
         PasswordText = CStr(myState(2))
      End If
   End If
End Sub


這個方法主要是由 .NET Framework 基礎結構使用,而且不能直接從程式碼使用。This method is used primarily by the .NET Framework infrastructure and is not intended to be used directly from your code. 不過,控制項開發人員可以覆寫這個方法,以指定自訂伺服器控制項還原其檢視狀態的方式。However, control developers can override this method to specify how a custom server control restores its view state. 如需詳細資訊,請參閱ASP.NET 狀態管理總覽For more information, see ASP.NET State Management Overview.