Control.OnInit(EventArgs) 方法

protected:
 virtual void OnInit(EventArgs ^ e);

protected public:
 virtual void OnInit(EventArgs ^ e);

protected virtual void OnInit (EventArgs e);

protected internal virtual void OnInit (EventArgs e);

abstract member OnInit : EventArgs -> unit
override this.OnInit : EventArgs -> unit

Protected Overridable Sub OnInit (e As EventArgs)

Protected Friend Overridable Sub OnInit (e As EventArgs)

參數

範例

// Override the OnInit method to set _text to
// a default value if it is null.
[System.Security.Permissions.PermissionSet
    (System.Security.Permissions.SecurityAction.Demand, 
     Name="FullTrust")] 
protected override void OnInit(EventArgs e)
{
   base.OnInit(e);
   if ( _text == null)
        _text = "Here is some default text.";
}

' Override the OnInit method to set _text to 
' a default value if it is null.
<System.Security.Permissions.PermissionSetAttribute( _
  System.Security.Permissions.SecurityAction.Demand, _
    Name:="FullTrust")> _
Protected Overrides Sub OnInit(ByVal e As EventArgs)
    MyBase.OnInit(e)
    If _text Is Nothing Then
        _text = "Here is some default text."
    End If
End Sub

備註

ASP.NET 呼叫此方法來引發 Init 事件。 如果您要開發自訂控制項，您可以覆寫這個方法，以提供額外的處理。 如果您覆寫此方法，請呼叫基底控制項 OnInit 的 方法來通知事件的訂閱者。

適用於

另請參閱

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