TXT WPF提供帮助文档.txt

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帮助模块：HelpProvider想用的可以去msdn上查一查，不过这货是windows.forms里的东西，不能在wpf里面用，坑爹呢啊这是，不过在网上找到了一个高人应该算是在wpf里重写了这个HelpProvider，这就让我们写wpf的也可以好好用了，代码经过测试，妥妥的。
namespace ContextSensitiveHelp
{
    /// <summary>
    /// This class provides the ability to easily attach Help functionality to Framework elements.
    /// To use it, you need to add a reference to the HelpProvider in your XAML.
    /// The FilenameProperty specifies the name of the help file, and the KeywordProperty specifies the keyword to be used with the search.
    /// </summary>
    /// <remarks>
    /// The FilenameProperty can be at a higher level of the visual tree than the KeywordProperty, so you don't need to set the filename each time.
    /// </remarks>
    static class HelpProvider
    {
        static HelpProvider()
        {
            CommandManager.RegisterClassCommandBinding(typeof(FrameworkElement),
                new CommandBinding(ApplicationCommands.Help,
                    new ExecutedRoutedEventHandler(Executed),
                    new CanExecuteRoutedEventHandler(CanExecute)));
        }
        #region Filename
        /// <summary>
        /// Filename Attached Dependency Property
        /// </summary>
        public static readonly DependencyProperty FilenameProperty =
          DependencyProperty.RegisterAttached("Filename", typeof(string), typeof(HelpProvider));
        /// <summary>
        /// Gets the Filename property.
        /// </summary>
        public static string GetFilename(DependencyObject d)
        {
            return (string)d.GetValue(FilenameProperty);
        }
        /// <summary>
        /// Sets the Filename property.
        /// </summary>
        public static void SetFilename(DependencyObject d, string value)
        {
            d.SetValue(FilenameProperty, value);
        }
        #endregion
        #region Keyword
        /// <summary>
        /// Keyword Attached Dependency Property
        /// </summary>
        public static readonly DependencyProperty KeywordProperty =
          DependencyProperty.RegisterAttached("Keyword", typeof(string), typeof(HelpProvider));
        /// <summary>
        /// Gets the Keyword property.
        /// </summary>
        public static string GetKeyword(DependencyObject d)
        {
            return (string)d.GetValue(KeywordProperty);
        }
        /// <summary>
        /// Sets the Keyword property.
        /// </summary>
        public static void SetKeyword(DependencyObject d, string value)
        {
            d.SetValue(KeywordProperty, value);