Windows Phone 7 浏览器控件(WebBrowser) 支持历史记录，前进，后退,刷新。等功能
由于要在应用程序内部访问网页。不跳出应用。所以要实现一个浏览器。但是悲催的事windows phone8 的
WebBrowser控件已经支持了像CanGoBack ，CanGoForward，GoBack，GoForward等这些功能。但是
wp7没有。网上搜了搜也都是简单的WebBrowser的使用方法。暂时就实现了几个前进后退几个功能。用在
page里面也很简单。实现的效果如下图所示。
因为使用十分简单。和windows phone8上的WebBrowser一样的。我就直接给控件的代码，就帖使用的代码了。
代码如下。注释也都写的比较清楚。
using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using Microsoft.Phone.Controls; using System.Windows.Markup; using System.Text.RegularExpressions; using Microsoft.Phone.Tasks; using System.Collections.Generic; using System.Windows.Navigation; namespace Controls.HcControl { public class HcWebView : Control { /// <summary> /// Gets the ControlTemplate string for the control. /// </summary> /// <remarks> /// Not in generic.xaml so the implementation of HcWebView can be entirely in this file. /// </remarks> private static string TemplateString { get { return "<ControlTemplate " + "xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" " + "xmlns:phone=\"clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone\" " + "xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\">" + "<Grid>" + "<phone:WebBrowser x:Name=\"WebBrowser\" IsScriptEnabled=\"True\"/>" + "</Grid>" + "</ControlTemplate>"; } } //----------对象的内部成员 #region Member /// <summary> /// WebBrowser. /// </summary> private WebBrowser _webBrowser; /// <summary> /// 历史Uri记录堆栈 /// </summary> private List<Uri> _historyStack; /// <summary> /// 历史记录堆栈索引 /// </summary> private int _historyStackIndex; /// <summary> /// 导航到的Uri是否来自历史堆栈 /// </summary> private bool _fromHistory; private bool canGoBack; /// <summary> /// 获取一个值，该值指示 WebBrowser 是否可以在浏览历史记录中向前导航一个页面。 /// </summary> public bool CanGoBack { get { return (_historyStackIndex > 1); } internal set { canGoBack = value; } } private bool canGoForward; /// <summary> /// 获取一个值，该值指示 WebBrowser 是否可以在浏览历史记录中向前导航一个页面。 /// </summary> public bool CanGoForward { get { return (_historyStackIndex < _historyStack.Count); } internal set { canGoForward = value; } } #endregion //----------对象的生命周期 #region LifeCycle /// <summary> /// Initializes a new instance of the HcWebView class. /// </summary> public HcWebView() { this._historyStack = new List<Uri>(); this._historyStackIndex = 0; this._fromHistory = false; this.Template = (ControlTemplate)XamlReader.Load(TemplateString); } /// <summary> /// Invoked when a new Template is applied. /// </summary> public override void OnApplyTemplate() { base.OnApplyTemplate(); if (_webBrowser != null) { _webBrowser.LoadCompleted -= OnLoadCompleted; _webBrowser.Navigated -= OnNavigated; _webBrowser.Navigating -= OnNavigating; _webBrowser.NavigationFailed -= OnNavigationFailed; _webBrowser.ScriptNotify -= OnScriptNotify; } _webBrowser = GetTemplateChild("WebBrowser") as WebBrowser; if (_webBrowser != null) { _webBrowser.LoadCompleted += OnLoadCompleted; _webBrowser.Navigated += OnNavigated; _webBrowser.Navigating += OnNavigating; _webBrowser.NavigationFailed += OnNavigationFailed; _webBrowser.ScriptNotify += OnScriptNotify; } } #endregion //----------对象响应的事件 #region Events /// <summary> /// 在 WebBrowser 控件已加载内容之后引发的事件。 /// </summary> public event LoadCompletedEventHandler LoadCompleted; private void OnLoadCompleted(object sender, NavigationEventArgs e) { if (LoadCompleted != null) { LoadCompleted(this, e); } } /// <summary> /// 在 WebBrowser 控件成功导航之后引发的事件。 /// <summary> public event EventHandler<NavigationEventArgs> Navigated; private void OnNavigated(object sender, NavigationEventArgs e) { if (!_fromHistory) { if (_historyStackIndex < _historyStack.Count) { _historyStack.RemoveRange(_historyStackIndex, _historyStack.Count - _historyStackIndex); } _historyStack.Add(e.Uri); _historyStackIndex += 1; } _fromHistory = false; if (Navigated != null) { Navigated(this, e); } } /// <summary> /// 当浏览器控件正在导航（包括从重定向）时引发的事件。 /// </summary> public event EventHandler<NavigatingEventArgs> Navigating; private void OnNavigating(object sender, NavigatingEventArgs e) { if (Navigating != null) { Navigating(this, e); } } /// <summary> /// 在 WebBrowser 控件导航失败之后引发的事件。 /// </summary> public event NavigationFailedEventHandler NavigationFailed; private void OnNavigationFailed(object sender, NavigationFailedEventArgs e) { if (NavigationFailed != null) { NavigationFailed(this, e); } } /// <summary> /// 当 Javascript 调用 window.external.notify(<data>) 时引发的事件 /// </summary> public event EventHandler<NotifyEventArgs> ScriptNotify; private void OnScriptNotify(object sender, NotifyEventArgs e) { if (ScriptNotify != null) { ScriptNotify(this, e); } } #endregion //----------对象的内部函数 #region Methods /// <summary> /// WebBrowser 在浏览历史记录中向后导航一个页面。 /// </summary> public void GoBack() { if (_historyStackIndex > 1) { _historyStackIndex -= 1; _fromHistory = true; _webBrowser.Navigate(_historyStack[_historyStackIndex - 1]); } } /// <summary> /// WebBrowser 在浏览历史记录中向前导航一个页面。 /// </summary> public void GoForward() { if (_historyStackIndex < _historyStack.Count) { _historyStackIndex += 1; _fromHistory = true; _webBrowser.Navigate(_historyStack[_historyStackIndex - 1]); } } /// <summary> /// Refresh HcWebView /// </summary> public void RefreshWebView() { if ((this._webBrowser) != null && (this._webBrowser.Source != null)) { this._webBrowser.Source = new Uri(this._webBrowser.Source.ToString()); } } /// <summary> /// 应用程序启动“Web 浏览器”应用程序。 /// </summary> public void ShowWebBrowser() { WebBrowserTask webTask = new WebBrowserTask(); if ( (this._webBrowser) != null && (this._webBrowser.Source != null)) { webTask.Uri = this._webBrowser.Source; } webTask.Show(); } #endregion //----------对象的依赖属性 #region DependencyProperty #region Source DependencyProperty /// <summary> /// Gets or sets the Source. /// </summary> public Uri Source { get { return (Uri)GetValue(SourceProperty); } set { SetValue(SourceProperty, value); } } /// <summary> /// Identifies the Source dependency property. /// </summary> public static readonly DependencyProperty SourceProperty = DependencyProperty.Register("Title", typeof(Uri), typeof(HcWebView), new PropertyMetadata(null, new PropertyChangedCallback(OnSourceChanged))); /// <summary> /// Prevents the webWiew Source from transitioning into a Semiexpanded or Collapsed visual state if the Source is not set. /// </summary> /// <param name="obj">The dependency object.</param> /// <param name="e">The event information.</param> private static void OnSourceChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e) { HcWebView webView = (HcWebView)obj; if (e.NewValue != null) { webView._webBrowser.Source = e.NewValue as Uri; } } #endregion #endregion } }
谢谢阅读。
