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RadHighlightTextBlock in an RadAutoCompleteBox


Product Version 2023.3.1011
Product RadHighlightTextBlock for WPF


How to use RadHighlightTextBlock in an RadAutoCompleteBox.


Define a new DataTemplate that contains a RadHighlightTextBlock instance and set it to the DropDownItemTemplate property of RadAutoCompleteBox. Bind the Text property of the RadHighlightTextBlock to the property from the items' model that will be displayed in the RadAutoCompleteBox instance. Bind the HighlightText property to the SearchText property of RadAutoCompleteBox.

Define the items' model and the view model

public class ItemInfo 
    public string Content { get; set; } 
public class MainViewModel 
    public MainViewModel() 
        this.ItemInfos = new ObservableCollection<ItemInfo>() 
            new ItemInfo() { Content = "Item 1" }, 
            new ItemInfo() { Content = "Item 2" }, 
            new ItemInfo() { Content = "Item 3" }, 
    public ObservableCollection<ItemInfo> ItemInfos { get; set; } 
Public Class ItemInfo 
    Public Property Content As String 
End Class 
Public Class MainViewModel 
    Public Sub New() 
        Me.ItemInfos = New ObservableCollection(Of ItemInfo)() From { 
            New ItemInfo() With { 
                .Content = "Item 1" 
            New ItemInfo() With { 
                .Content = "Item 2" 
            New ItemInfo() With { 
                .Content = "Item 3" 
    End Sub 
    Public Property ItemInfos As ObservableCollection(Of ItemInfo) 
End Class 

Creating a DataTemplate with a RadHighlightTextBlock

<DataTemplate x:Key="HighlightTextBlockDataTemplate"> 
    <telerik:RadHighlightTextBlock Text="{Binding Content}" 
                                   HighlightText="{Binding RelativeSource={RelativeSource   AncestorType=telerik:RadAutoCompleteBox}, Path=SearchText}"/> 

Set the custom DataTemplate to the DropDownItemTemplate property of RadAutoCompleteBox

                     ItemsSource="{Binding ItemInfos}" 
                     DropDownItemTemplate="{StaticResource HighlightTextBlockDataTemplate}"/> 
RadAutoCompleteBox with RadHighlightTextBlock

WPF RadAutoCompleteBox with RadHighlightTextBlock

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