Control.LoadViewState(Object) 方法

定義

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.

protected:
 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)

參數

savedState
Object

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

範例

下列範例會覆寫自訂 ASP.NET 伺服器控制項的 LoadViewState 方法。The following example overrides the LoadViewState method for a custom ASP.NET server control. 它會建立一個 Object 陣列,其中包含傳入 savedState 參數的檢視狀態資訊,然後針對陣列的第一個索引位置呼叫 LoadViewState 方法的基底執行。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. 它會將下兩個索引位置所儲存的值,分別指派給名為 UserTextPasswordText的變數。It 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)
         base.LoadViewState(myState[0]);
      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
         MyBase.LoadViewState(myState(0))
      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

備註

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.

適用於

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