WebBrowser.Url 属性

public:
 property Uri ^ Url { Uri ^ get(); void set(Uri ^ value); };

[System.ComponentModel.Bindable(true)]
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.WebBrowserUriTypeConverter))]
public Uri Url { get; set; }

[System.ComponentModel.Bindable(true)]
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.WebBrowserUriTypeConverter))]
public Uri? Url { get; set; }

[<System.ComponentModel.Bindable(true)>]
[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.WebBrowserUriTypeConverter))>]
member this.Url : Uri with get, set

Public Property Url As Uri

属性值

一个 Uri 表示当前文档的 URL。

属性

BindableAttribute TypeConverterAttribute

例外

示例

下面的代码示例演示如何使用 Url 属性实现控件的 WebBrowser 地址栏。 此示例要求窗体包含一个名为WebBrowser、一TextBoxAddresswebBrowser1个名为TextBox控件和一个名为Button控件的ButtonGo控件。 在文本框中键入 URL 并按 Enter 或单击 Go 按钮时，控件 WebBrowser 将导航到指定的 URL。 单击超链接导航时，文本框会自动更新以显示当前 URL。

// Navigates to the URL in the address text box when 
// the ENTER key is pressed while the text box has focus.
void TextBoxAddress_KeyDown( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^ e )
{
   if ( e->KeyCode == System::Windows::Forms::Keys::Enter &&  !this->TextBoxAddress->Text->Equals( "" ) )
   {
      this->WebBrowser1->Navigate( this->TextBoxAddress->Text );
   }
}

// Navigates to the URL in the address text box when 
// the Go button is clicked.
void ButtonGo_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   if (  !this->TextBoxAddress->Text->Equals( "" ) )
   {
      this->WebBrowser1->Navigate( this->TextBoxAddress->Text );
   }
}

// Updates the URL in TextBoxAddress upon navigation.
void WebBrowser1_Navigated( Object^ /*sender*/, System::Windows::Forms::WebBrowserNavigatedEventArgs^ /*e*/ )
{
   this->TextBoxAddress->Text = this->WebBrowser1->Url->ToString();
}

// Navigates to the URL in the address box when 
// the ENTER key is pressed while the ToolStripTextBox has focus.
private void toolStripTextBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        Navigate(toolStripTextBox1.Text);
    }
}

// Navigates to the URL in the address box when 
// the Go button is clicked.
private void goButton_Click(object sender, EventArgs e)
{
    Navigate(toolStripTextBox1.Text);
}

// Navigates to the given URL if it is valid.
private void Navigate(String address)
{
    if (String.IsNullOrEmpty(address)) return;
    if (address.Equals("about:blank")) return;
    if (!address.StartsWith("http://") &&
        !address.StartsWith("https://"))
    {
        address = "http://" + address;
    }
    try
    {
        webBrowser1.Navigate(new Uri(address));
    }
    catch (System.UriFormatException)
    {
        return;
    }
}

// Updates the URL in TextBoxAddress upon navigation.
private void webBrowser1_Navigated(object sender,
    WebBrowserNavigatedEventArgs e)
{
    toolStripTextBox1.Text = webBrowser1.Url.ToString();
}

' Navigates to the URL in the address box when 
' the ENTER key is pressed while the ToolStripTextBox has focus.
Private Sub toolStripTextBox1_KeyDown( _
    ByVal sender As Object, ByVal e As KeyEventArgs) _
    Handles toolStripTextBox1.KeyDown

    If (e.KeyCode = Keys.Enter) Then
        Navigate(toolStripTextBox1.Text)
    End If

End Sub

' Navigates to the URL in the address box when 
' the Go button is clicked.
Private Sub goButton_Click( _
    ByVal sender As Object, ByVal e As EventArgs) _
    Handles goButton.Click

    Navigate(toolStripTextBox1.Text)

End Sub

' Navigates to the given URL if it is valid.
Private Sub Navigate(ByVal address As String)

    If String.IsNullOrEmpty(address) Then Return
    If address.Equals("about:blank") Then Return
    If Not address.StartsWith("http://") And _
        Not address.StartsWith("https://") Then
        address = "http://" & address
    End If

    Try
        webBrowser1.Navigate(New Uri(address))
    Catch ex As System.UriFormatException
        Return
    End Try

End Sub

' Updates the URL in TextBoxAddress upon navigation.
Private Sub webBrowser1_Navigated(ByVal sender As Object, _
    ByVal e As WebBrowserNavigatedEventArgs) _
    Handles webBrowser1.Navigated

    toolStripTextBox1.Text = webBrowser1.Url.ToString()

End Sub

注解

设置此属性等效于调用 Navigate 该方法并向其传递指定的 URL。

该 WebBrowser 控件维护浏览会话期间访问的所有网页的历史记录列表。 设置 Url 属性时，控件 WebBrowser 将导航到指定的 URL，并将其添加到历史记录列表的末尾。

该 WebBrowser 控件将最近访问的网站中的网页存储在本地硬盘上的缓存中。 每个页面都可以指定一个过期日期，指示它将保留在缓存中的时长。 当控件导航到页面时，它可以通过显示缓存的版本（如果有）来节省时间，而不是再次下载页面。 Refresh使用该方法通过下载控件来强制WebBrowser重新加载当前页，确保控件显示最新版本。

另请参阅

• Navigate
• DocumentCompleted
• WebBrowser 控件
• IWebBrowser2 接口