StateBag.Remove(String) 方法

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

從 StateBag 物件移除指定的索引鍵/數值配對。

public:
 void Remove(System::String ^ key);

public void Remove (string key);

member this.Remove : string -> unit

Public Sub Remove (key As String)

參數

key

String

要移除的項目。

範例

下列程式碼範例示範如何使用 Remove 方法。

void MovePiece(string fromPosition, string toPosition) {
   StateBag bag = ViewState;
   object piece = bag[fromPosition];
   if (piece != null) {
      bag.Remove(fromPosition);
      bag.Add(toPosition, piece);
      RenderBoard();
   }
   else {
      throw new InvalidPositionException("There is no game piece at the \"from\" position."); 
   }
}

Sub MovePiece(fromPosition As String, toPosition As String)
   Dim bag As StateBag = ViewState
   Dim piece As Object = bag(fromPosition)
   If Not (piece Is Nothing) Then
      bag.Remove(fromPosition)
      bag.Add(toPosition, piece)
      RenderBoard()
   Else
      Throw New InvalidPositionException("There is no game piece at the ""from"" position.")
   End If
End Sub 'MovePiece

另請參閱

• ViewState
• Clear()
• Item[String]
• Add(String, Object)