ControlCollection(Control) 建構函式

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

初始化該類別的新實例 ControlCollection ，以啟用指定的父伺服器控制。

public:
 ControlCollection(System::Web::UI::Control ^ owner);

public ControlCollection(System.Web.UI.Control owner);

new System.Web.UI.ControlCollection : System.Web.UI.Control -> System.Web.UI.ControlCollection

Public Sub New (owner As Control)

參數

owner

Control

控制集合所用的 ASP.NET 伺服器控制。

例外狀況

ArgumentNullException

當參數 owner 為 null時發生。

範例

以下程式碼範例是一個自訂 ControlCollection 類別，當建立集合實例時，會覆寫建構子，將訊息（包含屬性名稱 Owner ）寫入追蹤日誌。 您必須啟用頁面或應用程式的描摹功能，此範例才能正常運作。

// Create a custom ControlCollection that writes
// information to the Trace log when an instance
// of the collection is created.
[AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
public class CustomControlCollection : ControlCollection
{
    private HttpContext context;

    public CustomControlCollection(Control owner)
        : base(owner)
    {

        HttpContext.Current.Trace.Write("The control collection is created.");
        // Display the Name of the control
        // that uses this collection when tracing is enabled.
        HttpContext.Current.Trace.Write("The owner is: " + this.Owner.ToString());
    }
}

' Create a custom ControlCollection that writes
' information to the Trace log when an instance
' of the collection is created.
<AspNetHostingPermission(SecurityAction.Demand, _
   Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomControlCollection
    Inherits ControlCollection

    Private context As HttpContext

    Public Sub New(ByVal owner As Control)
        MyBase.New(owner)
        HttpContext.Current.Trace.Write("The control collection is created.")
        ' Display the Name of the control
        ' that uses this collection when tracing is enabled.
        HttpContext.Current.Trace.Write("The owner is: " _
      & Me.Owner.ToString())
    End Sub


End Class

另請參閱

• Controls
• Control