WebBrowserNavigatingEventArgs.Url 属性
定义
重要
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获取 WebBrowser 控件要导航到的文档所在的位置。
public:
property Uri ^ Url { Uri ^ get(); };public Uri Url { get; }public Uri? Url { get; }member this.Url : UriPublic ReadOnly Property Url As Uri属性值
一个 Uri，表示 WebBrowser 控件要导航到的文档所在的位置。
示例
下面的代码示例演示了如何在尚未填写网页窗体时使用 事件的处理程序 WebBrowser.Navigating 来取消导航。 属性 WebBrowser.Document 用于确定表单输入字段是否包含值。 此示例要求窗体包含名为 WebBrowser 的 webBrowser1控件。
private void Form1_Load(object sender, EventArgs e)
{
webBrowser1.DocumentText =
"<html><body>Please enter your name:<br/>" +
"<input type='text' name='userName'/><br/>" +
"<a href='http://www.microsoft.com'>continue</a>" +
"</body></html>";
webBrowser1.Navigating +=
new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
}
private void webBrowser1_Navigating(object sender,
WebBrowserNavigatingEventArgs e)
{
System.Windows.Forms.HtmlDocument document =
this.webBrowser1.Document;
if (document != null && document.All["userName"] != null &&
String.IsNullOrEmpty(
document.All["userName"].GetAttribute("value")))
{
e.Cancel = true;
System.Windows.Forms.MessageBox.Show(
"You must enter your name before you can navigate to " +
e.Url.ToString());
}
}
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _
Handles Me.Load
webBrowser1.DocumentText = _
"<html><body>Please enter your name:<br/>" & _
"<input type='text' name='userName'/><br/>" & _
"<a href='http://www.microsoft.com'>continue</a>" & _
"</body></html>"
End Sub
Private Sub webBrowser1_Navigating( _
ByVal sender As Object, ByVal e As WebBrowserNavigatingEventArgs) _
Handles webBrowser1.Navigating
Dim document As System.Windows.Forms.HtmlDocument = _
webBrowser1.Document
If document IsNot Nothing And _
document.All("userName") IsNot Nothing And _
String.IsNullOrEmpty( _
document.All("userName").GetAttribute("value")) Then
e.Cancel = True
MsgBox("You must enter your name before you can navigate to " & _
e.Url.ToString())
End If
End Sub
