如何突出显示Windows Phone 7中上下文相关搜索的结果? [英] How to Highlight the result from context sensitive search in windows phone 7?

问题描述

我需要根据Windows Phone 7的文本框中输入的文本突出显示搜索结果.

I need to to Highlight the search result according to the text that is entered in the text box in windows phone 7,

通常的wpf代码在Windows Phone 7中不起作用.有人说如何在Windows Phone 7中实现这一目标

the usual wpf code is not working in windows phone 7. . Somebody say how to achieve this in windows phone 7

实际上这是我用来填充联系人列表的xaml列表框，

Actually this is the xaml Listbox I'm using to populate the Contact list,

    <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();
    }
    }

如何在此突出显示

提前谢谢！

推荐答案

我在 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！

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