我创建了一个简单的网页html抓取工具,用于从本地在线新闻网站检索新闻标题超链接,并在全屏宽度x 150px WebBrowser控件(HeadlineLinkBrowser)上滚动显示。
每次选择标题链接时,都会打开一个新的默认网络浏览器(在本例中为Chrome)窗口并显示新闻报道。
我是否可以访问或修改超链接点击事件,或者我可以使用任何其他方法,以使超链接导航到应用程序中的另一个WebBrowser控件(StoryTextBrowser)而不是打开一个新的Chrome窗口?
我对C#开发相对较新,并且是WPF的完整新手..
答案 0 :(得分:2)
这是一个示例WPF应用程序,它打开另一个WPF WebBrowser
实例中的所有导航链接(包括新窗口链接)。它使用底层的WebBrowser
ActiveX控件来实现并依赖于SHDocVw.dll COM互操作程序集。首先生成SHDocVw.dll:tlbimp.exe ieframe.dll
,然后添加为项目的引用。请注意manualNavigation
如何用于区分用户导航和程序导航(通过webBrowser.Navigate
)。
<强> C#强>:
using System;
using System.Windows;
using System.Windows.Controls;
using System.Reflection;
namespace WpfWebBrowser
{
// http://stackoverflow.com/q/19170109/1768303
public partial class MainWindow : Window
{
static object GetActiveXInstance(WebBrowser wb) {
// get the underlying WebBrowser ActiveX object;
// this code depends on SHDocVw.dll COM interop assembly,
// generate SHDocVw.dll: "tlbimp.exe ieframe.dll",
// and add as a reference to the project
return wb.GetType().InvokeMember("ActiveXInstance",
BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.NonPublic,
null, wb, new object[] { }) as SHDocVw.WebBrowser;
}
public MainWindow()
{
InitializeComponent();
this.Loaded += (s, e) =>
{
var axWbMainV1 = (SHDocVw.WebBrowser_V1)GetActiveXInstance(this.wbMaster);
var axWbSlaveV1 = (SHDocVw.WebBrowser_V1)GetActiveXInstance(this.wbSlave);
var manualNavigation = false;
// Use WebBrowser_V1 events as BeforeNavigate2 doesn't work with WPF WebBrowser
axWbMainV1.BeforeNavigate += (string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Cancel) =>
{
if (!manualNavigation)
return;
Cancel = true;
axWbMainV1.Stop();
axWbSlaveV1.Navigate(URL, Flags, TargetFrameName, PostData, Headers);
};
axWbMainV1.FrameBeforeNavigate += (string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Cancel) =>
{
if (!manualNavigation)
return;
Cancel = true;
axWbMainV1.Stop();
axWbSlaveV1.Navigate(URL, Flags, TargetFrameName, PostData, Headers);
};
axWbMainV1.NavigateComplete += (string URL) =>
{
manualNavigation = true;
};
axWbMainV1.FrameNavigateComplete += (string URL) =>
{
manualNavigation = true;
};
axWbMainV1.NewWindow += (string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Processed) =>
{
if (!manualNavigation)
return;
Processed = true;
axWbMainV1.Stop();
axWbSlaveV1.Navigate(URL, Flags, String.Empty, PostData, Headers);
};
manualNavigation = false;
axWbMainV1.Navigate("http://www.w3.org/");
};
}
}
}
<强> XAML 强>:
<Window x:Class="WpfWebBrowser.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Width="800" Height="600">
<StackPanel>
<WebBrowser Margin="4" Name="wbMaster" Height="300"/>
<WebBrowser Margin="4" Name="wbSlave" Height="300"/>
</StackPanel>
</Window>