c# - 如何在 Windows Phone 7 中突出显示上下文相关搜索的结果？

Question

我需要根据在windows phone 7的文本框中输入的文本来突出显示搜索结果，

通常的 wpf 代码在 Windows Phone 7 中不起作用。.有人说如何在 Windows Phone 7 中实现这一点

实际上这是我用来填充联系人列表的 xaml 列表框，

    <ListBox Name="ContactList" ItemsSource="{Binding}" Margin="14,85,14,28" Foreground="White" SizeChanged="ContactList_SizeChanged">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Border BorderThickness="2" HorizontalAlignment="Left" VerticalAlignment="Center" BorderBrush="{StaticResource PhoneAccentBrush}" >
                            <Image Source="{Binding Converter={StaticResource ContactPictureConverter}}" Width="48" Height="48" Stretch="Fill" Name="img1" />
                        </Border>
                        <TextBlock Name="ContactResults" Text="{Binding Path=DisplayName, Mode=OneWay}" FontSize="{StaticResource PhoneFontSizeExtraLarge}" Margin="18,8,0,0" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <TextBox Name="contactFilterString" Margin="0,0,0,528" TextChanged="contactFilterString_TextChanged" />

C#代码，

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;
    using System.Windows;
    //using System.Windows.Controls;
    using System.Windows.Documents;
    using System.Windows.Input;
    using System.Windows.Media;
    using System.Windows.Media.Animation;
    using System.Windows.Shapes;
    using Microsoft.Phone.Controls;
    using Microsoft.Phone.UserData;
    using Newtonsoft.Json;
    using Newtonsoft.Json.Linq;
    using System.Collections.ObjectModel;
    using Microsoft.Phone.Shell;
    using System.Windows.Controls;
    using System.Windows.Media.Imaging;
    using System.Text.RegularExpressions;

    namespace SmartContactsApp
    {
public partial class MainPage : PhoneApplicationPage
{
    private List<Address> lstAddress = new List<Address>();
    public string addressJson = string.Empty;

    // Constructor
    public MainPage()
    {
        InitializeComponent();

        this.Loaded += new RoutedEventHandler(MainPage_Loaded);
        CreateSecondaryTile();
    }

    /// <summary>
    /// To List all the Contacts. . .
    /// </summary>
    private void ContactListing()
    {
        ContactList.DataContext = null;
        Contacts cons = new Contacts();
        cons.SearchCompleted += new EventHandler<ContactsSearchEventArgs>(Contacts_SearchCompleted);
        cons.SearchAsync(contactFilterString.Text, FilterKind.DisplayName, "Contacts");
    }

    /// <summary>
    /// To Fetch All Contacts from Mobile Contacts. . .
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    public void Contacts_SearchCompleted(object sender, ContactsSearchEventArgs e)
    {
        try
        {
            ContactList.DataContext = e.Results;

        }
        catch (Exception)
        {
            throw;
        }
    }

    private void contactFilterString_TextChanged(object sender, TextChangedEventArgs e)
    {
        ContactListing();
    }
    }

如何突出显示，

提前致谢!

Answer 1

我是在 this 的帮助下完成的

Xaml 代码:

    <!--ContentPanel - place additional content here-->
    <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
        <ListBox Name="ContactList" Margin="14,85,14,28" Foreground="White">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding DisplayName}" Width="450" TextWrapping="Wrap" FontSize="24" Visibility="Collapsed"/>
                        <RichTextBox Width="450" FontSize="24" Foreground="#FFFFFF"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <TextBox Name="contactFilterString" Margin="0,0,0,528" TextChanged="contactFilterString_TextChanged" />
    </Grid>

C#代码:

            private void contactFilterString_TextChanged(object sender, TextChangedEventArgs e)
    {
       // ContactListing();
        SearchVisualTree(ContactList);
        if (contactFilterString.Text == "")
        {
            ContactListing();
        }
    }

    private void SearchVisualTree(Action ContactListing)
    {
        SearchVisualTree(ContactList);
    }

    private void SearchVisualTree(DependencyObject targetElement)
    {

        var count = VisualTreeHelper.GetChildrenCount(targetElement);

        for (int i = 0; i < count; i++)
        {
            var child = VisualTreeHelper.GetChild(targetElement, i);
            if (child is TextBlock)
            {
                textBlock1 = (TextBlock)child;
                HighlightText();
                break;
            }
            else
            {
                //ContactListing();
                SearchVisualTree(child);
            }
        }
    }

    private void HighlightText()
    {
        if (textBlock1 != null)
        {
            string text = textBlock1.Text;
            textBlock1.Text = text;
            textBlock1.Inlines.Clear();

            int index = text.IndexOf(contactFilterString.Text);
            int lenth = contactFilterString.Text.Length;


            if (!(index < 0))
            {
                Run run = new Run() { Text = text.Substring(index, lenth), FontWeight = FontWeights.ExtraBold };
                run.Foreground = new SolidColorBrush(Colors.Orange);
                textBlock1.Inlines.Add(new Run() { Text = text.Substring(0, index), FontWeight = FontWeights.Normal });
                textBlock1.Inlines.Add(run);
                textBlock1.Inlines.Add(new Run() { Text = text.Substring(index + lenth), FontWeight = FontWeights.Normal });

                textBlock1.FontSize = 30;
                textBlock1.Foreground = new SolidColorBrush(Colors.Black);
            }
            else
            {
                //textBlock1.Text = "No Match";

            }
        }

    }

     /// <summary>
    /// To List all the Contacts. . .
    /// </summary>
    private void ContactListing()
    {
        ContactList.DataContext = null;
        Contacts cons = new Contacts();
        cons.SearchCompleted += new EventHandler<ContactsSearchEventArgs>(Contacts_SearchCompleted);
        cons.SearchAsync(contactFilterString.Text, FilterKind.DisplayName, "Contacts");
    }

    /// <summary>
    /// To Fetch All Contacts from Mobile Contacts. . .
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    public void Contacts_SearchCompleted(object sender, ContactsSearchEventArgs e)
    {
        try
        {

            ContactList.DataContext = e.Results;

        }
        catch (Exception)
        {
            throw;
        }
    }

感谢您的帮助!