HtmlElementEventHandler 代理人

定義

public delegate void HtmlElementEventHandler(System::Object ^ sender, HtmlElementEventArgs ^ e);

public delegate void HtmlElementEventHandler(object sender, HtmlElementEventArgs e);

public delegate void HtmlElementEventHandler(object? sender, HtmlElementEventArgs e);

type HtmlElementEventHandler = delegate of obj * HtmlElementEventArgs -> unit

Public Delegate Sub HtmlElementEventHandler(sender As Object, e As HtmlElementEventArgs)

參數

範例

以下程式碼附加事件處理程序，處理 MouseDownMouseMove、 及MouseUp事件。HtmlDocument 這個範例程式碼假設你的專案有一個名為 WebBrowser的控制項實例WebBrowser1。

private:
   void webBrowser1_DocumentCompleted( Object^ /*sender*/, System::Windows::Forms::WebBrowserDocumentCompletedEventArgs^ /*e*/ )
   {
      WebBrowser1->Document->MouseDown += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseDown );
      WebBrowser1->Document->MouseMove += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseMove );
      WebBrowser1->Document->MouseUp += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseUp );
   }

   void Document_MouseDown( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }

   void Document_MouseMove( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }

   void Document_MouseUp( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }

private void webBrowser1_DocumentCompleted(object sender, System.Windows.Forms.WebBrowserDocumentCompletedEventArgs e)
{
    WebBrowser1.Document.MouseDown += new HtmlElementEventHandler(Document_MouseDown);
    WebBrowser1.Document.MouseMove += new HtmlElementEventHandler(Document_MouseMove);
    WebBrowser1.Document.MouseUp += new HtmlElementEventHandler(Document_MouseUp);
}

private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}

private void Document_MouseMove(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}

private void Document_MouseUp(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}

Private Sub WebBrowser1_DocumentCompleted(ByVal sender As Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
    Dim Doc As HtmlDocument = WebBrowser1.Document

    AddHandler Doc.MouseDown, New HtmlElementEventHandler(AddressOf Document_MouseDown)
    AddHandler Doc.MouseMove, New HtmlElementEventHandler(AddressOf Document_MouseMove)
    AddHandler Doc.MouseUp, New HtmlElementEventHandler(AddressOf Document_MouseUp)
End Sub

Private Sub Document_MouseDown(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

Private Sub Document_MouseMove(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

Private Sub Document_MouseUp(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

備註

當你建立 HtmlElementEventHandler 代理人時，你就能確定處理事件的方法。 要將事件與你的事件處理器關聯，請將該代理的實例加入事件中。 事件處理程序會在事件發生時被呼叫，除非你移除代理。 欲了解更多關於事件處理代理的資訊，請參閱 「處理與提升事件」。

你必須等 HTML 文件載入完成後，才能將事件處理器附加到文件上。 若在裝載完成前嘗試連接處理機，連接操作可能會失敗。 在新文件中附加事件處理器的最佳位置是控制 DocumentCompleted 項的事件處理程序 WebBrowser 。