我有一个列表框,每当我更新listboxitemsource时,我会根据文本框的文本更改事件在其中显示增量搜索结果。列表框中显示的项目必须突出显示它的文本。
Suppose the person enter in textbox sy and the listbox displays the result all getting started with sy :
Somewhat like this...,
System
SystemDefault
SystemFolder
so for the all above 3 results Sy must be highlighted.
如何实现这一目标? tx提前
答案 0 :(得分:1)
首先:TextBlock可以由一系列Inline
项组成,每个项都可以具有不同的字体特征。试着看看结果: -
<TextBlock><Run FontWeight="Bold">Sy</Run><Run>stem</Run></TextBlock>
第二次:只要您绑定一次,就可以将ListBox
绑定到ObservableCollection<TextBlock>
。
第三次:您可以在代码中操作文本块的Inlines
集的内容。
全部放在一起: -
的Xaml: -
<UserControl x:Class="StackoverflowSpikes.ItemHighlighter"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>
<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBox Name="textBox1" TextChanged="textBox1_TextChanged" />
<ListBox Grid.Row="1" Name="listBox1" />
</Grid>
</UserControl>
代码: -
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Collections.ObjectModel;
namespace StackoverflowSpikes
{
public partial class ItemHighlighter : UserControl
{
ObservableCollection<TextBlock> items = new ObservableCollection<TextBlock>();
string[] source = new string[] { "Hello", "World", "System", "SystemDefault", "SystemFolder" };
public ItemHighlighter()
{
InitializeComponent();
Loaded += new RoutedEventHandler(ItemHighlighter_Loaded);
}
void ItemHighlighter_Loaded(object sender, RoutedEventArgs e)
{
foreach (string s in source)
{
TextBlock item = new TextBlock();
item.Inlines.Add(new Run() { Text = "", FontWeight = FontWeights.Bold });
item.Inlines.Add(new Run() { Text = s });
items.Add(item);
}
listBox1.ItemsSource = items;
}
private void textBox1_TextChanged(object sender, TextChangedEventArgs e)
{
string match = textBox1.Text;
foreach (TextBlock item in listBox1.Items)
{
Run bold = ((Run)item.Inlines[0]);
Run normal = ((Run)item.Inlines[1]);
string s = bold.Text + normal.Text;
if (s.StartsWith(match))
{
bold.Text = s.Substring(0, match.Length);
normal.Text = s.Substring(match.Length);
}
else
{
bold.Text = "";
normal.Text = s;
}
}
}
}
}
将其打入一个新项目并进行游戏。应该工作SL3和4。
答案 1 :(得分:0)
也许使用RichTextBox而不是ListView? 然后你可以加粗每个字符串匹配。