I currently have an RadAutoCompelteBox similar to this:

        <telerik:RadAutoCompleteBox  x:Name="MyGrid"
                                 KeyDown="OnSearchBoxKeyDown"
                                 SearchTextChanged="OnSearchTextChanged"
                                 ItemsSource="{Binding Source={StaticResource ViewModel}}, Path=Data.MyData"
                                 SelectionMode="Single"
                                 DisplayMemberPath="Display"
                                 TextSearchPath="MyNumber"
                                 SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
                                 SearchText="{Binding SearchText, Mode=TwoWay}"
                                 TextSearchMode="Contains"
                                 DropDownItemTemplate="{StaticResource MyDropDownTemplate}">
            <telerik:RadAutoComplete.FilteringBehavior>
                <telerik:AsyncFilteringBehavior/>
            </telerik:RadAutoComplete.FilteringBehavior>
        </telerik:RadAutoCompleteBox>

What is happening is this.
View the view loads we load the selected item has it has a value. (Say "123456").

When the user clicks on the autocompeltebox the whole selection highlights. (That's fine)
User then clicks it a second time and the cursor is then at the end of the 6 in my example.
User then clicks backspace and the entire selection clears out. 

At that point why would it not just remove the 6?

        private void OnSearchTextChanged(object sender, EventArgs e)
        {
            // Try to capture this and do what I want.
        }

I've tried to use this method to achieve what I want to happen, however the EventArgs is always empty.

How can I accomplish this? (I want the backspace to clear one character at a time)

I will note that we have other AutoCompleteBoxes that work as intended the only difference between those ones and this one is that the ones that work have all the data loaded up front in the ItemsSource.
This one we are searching the DB for the data as the user types.

Hello,

I need some advice about RadAutoCompleteBox.

When I click on RadAutoCompleteBox I want to see all possible results and then I will have a option to choose whether I want to select from them or start searching by typing.  Searching for text and then selecting works fine, but unfortunately searching with nothing in it doesn't work. When I click on RadAutoCompleteBox all the results are displayed, but I can't select anything from them until I type something. The hover selection works fine, I just can't select anything if RadAutoCompleteBox.SearchText is empty. Could you help me how to solve this? Thank you very much.

I am sending part of my the source code and example (WpfApp1.zip) where it also not working.

... 
 <controls:RadAutoCompleteBoxFilter x:Key="RadAutoCompleteBoxFilter" />
...
     <telerik:RadAutoCompleteBox Grid.Row="0"
                      x:Name="CaseAutoCompleteBox"
                      WatermarkContent="{x:Static rs:ResourceText.Start_Typing}"
                      ItemsSource="{Binding Suggestions}"
                      SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
                      TextSearchMode="Contains"
                      TextSearchPath="Name"
                      DisplayMemberPath="Name"
                      AutoCompleteMode="SuggestAppend"
                      DropDownItemTemplate="{StaticResource CasesSearchAutoComplete}"
                      SelectionMode="Single"
                      SelectionChanged="CaseAutoCompleteBoxSelectionChanged"
                      PreviewMouseLeftButtonDown="OnPreviewMouseLeftButtonDown"
                      GotFocus="CaseAutoCompleteBox_OnGotFocus"
                      FilteringBehavior="{StaticResource RadAutoCompleteBoxFilter}"
                    
                      />

 public partial class AddMediaToCase 
 {
     public AddMediaToCase()
     {
         InitializeComponent();
         RadWindowInteropHelper.SetShowInTaskbar(this, true);
     }

     private void CaseAutoCompleteBoxSelectionChanged(object sender, SelectionChangedEventArgs e)
     {
         var autoCompleteBox = sender as RadAutoCompleteBox;
         CaseInformationStackPanel.Visibility = autoCompleteBox.SelectedItem != null ? Visibility.Visible : Visibility.Collapsed;
     }

     private void OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
     {

         if (string.IsNullOrWhiteSpace(CaseAutoCompleteBox.SearchText))
         {
             CaseAutoCompleteBox.Populate(" ");
             
         }


     }

     private void CaseAutoCompleteBox_OnGotFocus(object sender, RoutedEventArgs e)
     {
         if (string.IsNullOrWhiteSpace(CaseAutoCompleteBox.SearchText))
         {
             
             CaseAutoCompleteBox.Populate(" ");
         }

     }
 }

  public class RadAutoCompleteBoxFilter : FilteringBehavior
  {
      public override IEnumerable<object> FindMatchingItems(string searchText, IList items,
          IEnumerable<object> escapedItems, string textSearchPath,
          TextSearchMode textSearchMode)
      {
          var result =
              base.FindMatchingItems(searchText, items, escapedItems, textSearchPath, textSearchMode) as
                  IEnumerable<object>;

          if (string.IsNullOrEmpty(searchText) || !result.Any())
          {
              return ((IEnumerable<object>)items).Where(x => !escapedItems.Contains(x));
          }

          return result;
      }
  }

I am using the RadAutoCompleteBox as follows. I would like to display all Products when pressing the "Keyboard Down Arrow" on the RadAutoCompleteBox. Is this possible?

<telerik:RadAutoCompleteBox Height="23" Width="180" Background="#FFEDF4AB" Margin="3,0,0,0" 
							ItemsSource="{Binding Products}" 
							SelectedItem="{Binding SelectedProductItem, Mode=TwoWay}"                                                
							SelectionMode="Single" 
							TextSearchMode="StartsWith"
							SearchText="{Binding Name, Mode=TwoWay}"
							TextSearchPath="Name"
							DisplayMemberPath="Name"
							AutoCompleteMode="Suggest" >
	<telerik:RadAutoCompleteBox.DropDownItemTemplate>
		<DataTemplate>
			<StackPanel Orientation="Horizontal">
				<TextBlock Text="{Binding Name}" FontWeight="Bold" Foreground="Black" Width="200" />
			</StackPanel>
		</DataTemplate>
	</telerik:RadAutoCompleteBox.DropDownItemTemplate>
	<Behaviors:Interaction.Triggers>
		<Behaviors:EventTrigger EventName="SelectionChanged">
			<Behaviors:InvokeCommandAction Command="{Binding SelectProductCommand}" />
		</Behaviors:EventTrigger>
	</Behaviors:Interaction.Triggers>
</telerik:RadAutoCompleteBox>

I am using a WPF RadAutoCompleteBox control in my application, I am trying to set a custom style to this control but there are a few behaviors I could not get it right.

This is the current look of the control:

The colors I wish to change:

1. Text color in the textblock as pointed with the green arrow.

2. The background of the selected item in the drop down menu as pointed with the blue arrow. Currently it is showing as transparent, but I wish change it into a solid color.

3. The transparent background of the drop down menu as pointed with the purple arrow.

I have tried to change the background and foreground properties but could not see the effect on the control. I have attached the style file I used for the control.

Any advice?

Thank you!

Hi
Please find my below code showing the celledittemplate

<telerik:GridViewDataColumn.CellEditTemplate>
    <DataTemplate>
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <tbcontrols:SmartSearchRadAutoCompleteBox x:Name="JournalSuggestions" AutomationProperties.AutomationId="JournalSuggestions" 
                                        Style="{StaticResource SmartControlStyle}"  
                                        SelectionMode="Single" 
                                        KeyDown="JournalSuggestions_KeyDown"                                                                        
                                        PreviewGotKeyboardFocus="JournalSuggestions_PreviewGotKeyboardFocus"
                                        Populating="JournalSuggestions_Populating"
                                        Width="{Binding RelativeSource={RelativeSource AncestorType=telerik:GridViewDataColumn}, Path=ActualWidth}"
                                        BorderThickness="0" 
                                        BorderBrush="Transparent" 
                                        ClipToBounds="True" 
                                        AutoCompleteMode="Suggest"
                                        ItemsSource="{Binding Source={StaticResource SmartJournalAccounts}}"
                                        DisplayMemberPath="Code" 
                                        FilteringBehavior="{StaticResource LocalJournalFilter}"
                                        HorizontalAlignment="Stretch" 
                                        VerticalAlignment="Stretch"
                                        VerticalContentAlignment="Center"
                                        DropDownItemTemplate="{Binding Source={StaticResource CustomDropDownTemplate}}" 
                                        NoResultsContentTemplate="{StaticResource NoResultsContentTemplate}"
                                        DropDownWidth="Auto"  
                                        BoxesItemStyle="{StaticResource CustomRadAutoCompleteBoxesItemStyle}" 
                                        IsEnabled="True" 
                                        Margin="-17 0 0 0"                                                                        
                                        SearchText="{Binding DataContext.SmartControlSearchText, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:RadGridView}}, UpdateSourceTrigger=PropertyChanged, Mode=OneWayToSource}"
                                        SelectedItem="{Binding Path=SmartJournalAccountItem, Mode=TwoWay}"
                                        TextSearchMode="Contains" TextBoxStyle="{StaticResource TrailBalanceAccountTextBoxStyle}" FontSize="12" >
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="SelectionChanged">
                        <cal:ActionMessage MethodName="AutoCompleteBoxSelectionChanged">
                            <cal:Parameter Value="{Binding SelectedItem, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:RadAutoCompleteBox}}}"></cal:Parameter>
                        </cal:ActionMessage>
                    </i:EventTrigger>
                </i:Interaction.Triggers>
                <i:Interaction.Behaviors>
                    <behaviours:RadAutoCompleteBoxBehavior/>
                </i:Interaction.Behaviors>
            </tbcontrols:SmartSearchRadAutoCompleteBox>
            <Button x:Name="SearchButton" Grid.Column="1"
DataContext="{Binding DataContext, RelativeSource={RelativeSource AncestorType=controls:APTPanel}}"
                    Click="SearchButton_Click">                
                <Button.Visibility>
                        <con:ConverterBindableBinding Binding="{Binding IsSearchAccountVisible,UpdateSourceTrigger=PropertyChanged}" 
                                                      Converter="{StaticResource BooleanToVisibilityConverter}"
                                                      ConverterParameterBinding="{Binding IsSearchAccountVisible, RelativeSource={RelativeSource AncestorType={x:Type controls:APTPanel}}, UpdateSourceTrigger=PropertyChanged}">
                        </con:ConverterBindableBinding>
                    </Button.Visibility>
            </Button>
        </Grid>
    </DataTemplate>
</telerik:GridViewDataColumn.CellEditTemplate>

If I click the "SearchButton" on first click the event does not fire, the click event fires if I click it second time.
If I remove the SmartSearchRadAutoCompleteBox  control & only keep the SearchButton then it works ok.

Can someone give me code snippet having multiple controls (one radautosearchbox & one button) in datatemplate of celledittemplate or help me understand what is causing issue in my  Click event

Regards,
Swapnil. 

See the following:

Dispatcher process has been suspended, but messages are still being processed. in UI for WPF | Telerik Forums

I cannot reproduce using a simple test project. I am attaching a Word VSTO project that is a test version. I have removed packages which included Fody PropertyChanged and the Telerik Xaml controls.

We are seeing a Dispatch Processor error in Word when the HighlightText is enabled. It goes away if that is removed. Our VSTO project is way too large to easily demo but we passed QA if that HighlightText is removed. Why that is happening is hard to say since Word COM provides little to no information on the issue.

I will compare code against Vladimir's sample and see if I can spot differences. Will get back if something pops out.

Hi,

Would it be possible to have an editable AutoCompleteBox TextBox Part to mimic the RadWatermarkTextBox with floating Label?