WebBrowser.DocumentCompleted WebBrowser.DocumentCompleted WebBrowser.DocumentCompleted WebBrowser.DocumentCompleted Event

定义

WebBrowser 控件完成加载文档时发生。Occurs when the WebBrowser control finishes loading a document.

public:
 event System::Windows::Forms::WebBrowserDocumentCompletedEventHandler ^ DocumentCompleted;
public event System.Windows.Forms.WebBrowserDocumentCompletedEventHandler DocumentCompleted;
member this.DocumentCompleted : System.Windows.Forms.WebBrowserDocumentCompletedEventHandler 
Public Event DocumentCompleted As WebBrowserDocumentCompletedEventHandler 

示例

下面的代码示例演示如何将此事件,以便完全加载后打印文档。The following code example demonstrates the use of this event to print a document after it has fully loaded.

private void PrintHelpPage()
{
    // Create a WebBrowser instance. 
    WebBrowser webBrowserForPrinting = new WebBrowser();

    // Add an event handler that prints the document after it loads.
    webBrowserForPrinting.DocumentCompleted +=
        new WebBrowserDocumentCompletedEventHandler(PrintDocument);

    // Set the Url property to load the document.
    webBrowserForPrinting.Url = new Uri(@"\\myshare\help.html");
}

private void PrintDocument(object sender,
    WebBrowserDocumentCompletedEventArgs e)
{
    // Print the document now that it is fully loaded.
    ((WebBrowser)sender).Print();

    // Dispose the WebBrowser now that the task is complete. 
    ((WebBrowser)sender).Dispose();
}
Private Sub PrintHelpPage()

    ' Create a WebBrowser instance. 
    Dim webBrowserForPrinting As New WebBrowser()

    ' Add an event handler that prints the document after it loads.
    AddHandler webBrowserForPrinting.DocumentCompleted, New _
        WebBrowserDocumentCompletedEventHandler(AddressOf PrintDocument)

    ' Set the Url property to load the document.
    webBrowserForPrinting.Url = New Uri("\\myshare\help.html")

End Sub

Private Sub PrintDocument(ByVal sender As Object, _
    ByVal e As WebBrowserDocumentCompletedEventArgs)

    Dim webBrowserForPrinting As WebBrowser = CType(sender, WebBrowser)

    ' Print the document now that it is fully loaded.
    webBrowserForPrinting.Print()
    MessageBox.Show("print")

    ' Dispose the WebBrowser now that the task is complete. 
    webBrowserForPrinting.Dispose()

End Sub

注解

WebBrowser设置以下属性之一,或调用方法时,控件导航到新文档:The WebBrowser control navigates to a new document whenever one of the following properties is set or methods is called:

处理DocumentCompleted新文档完成加载时接收通知的事件。Handle the DocumentCompleted event to receive notification when the new document finishes loading. DocumentCompleted发生事件时,完全加载新文档,这意味着您可以访问通过其内容DocumentDocumentText,或DocumentStream属性。When the DocumentCompleted event occurs, the new document is fully loaded, which means you can access its contents through the Document, DocumentText, or DocumentStream property.

若要接收通知,在导航开始前,处理Navigating事件。To receive notification before navigation begins, handle the Navigating event. 处理此事件可以取消导航,如果某些条件未满足,例如,当用户未填写完窗体。Handling this event lets you cancel navigation if certain conditions have not been met, for example, when the user has not completely filled out a form. 处理Navigated事件以接收通知时WebBrowser控件完成导航并开始加载新位置上的文档。Handle the Navigated event to receive notification when the WebBrowser control finishes navigation and has begun loading the document at the new location.

有关处理事件的详细信息,请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

安全性

SecurityPermission
对于直接调用方使用此控件。for immediate callers to use this control. 要求值: LinkDemand;[NIB:命名权限集](https://msdn.microsoft.com/library/08250d67-c99d-4ab0-8d2b-b0e12019f6e3): FullTrustDemand value: LinkDemand; [NIB: Named Permission Sets](https://msdn.microsoft.com/library/08250d67-c99d-4ab0-8d2b-b0e12019f6e3): FullTrust.

适用于

另请参阅