RadComboBox Autocomplete removes first character

[iahulg]

Hi 
I need to implement RadComboBox Autocomplete after 2 chars entered..

After I enter the second char it removes the first char and shows the popup (see attachment).
Any ideas how to handle this ?

Codebehind:

 

1.private void RadComboBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
2.{
3.      var combo = sender as RadComboBox;
4.      if (!combo.IsDropDownOpen && combo.Text?.Length >=1)
5.         {
6.           combo.IsDropDownOpen = true;
7.         }
8.}

 

XAML:

 

01.<telerik:RadComboBox ItemsSource="{Binding PickTickets}"
02.                        DisplayMemberPath="PickTicketIdentity"
03.                        EmptyText="Please select a pick ticket"<br>
04.                        IsEditable="True"
05.                        IsFilteringEnabled="True"
06.                        TextSearchMode="Contains"
07.                        CanAutocompleteSelectItems="False"
08.                        StaysOpenOnEdit="True"
09.                        SelectedItem="{Binding SelectedPickTicket}"
10.                        KeyDown="RadComboBox_KeyDown"/>

[Pavel]

Works with 

 private void combo_TextChanged(object sender, TextChangedEventArgs args)
{
    var combo = sender as RadComboBox;
   if (!combo.IsDropDownOpen && combo.Text?.Length >= 2)
   {
      combo.IsDropDownOpen = true;
   }
}

 

TextBoxBase.TextChanged="combo_TextChanged" SelectAllTextEvent="None"

[Pavel]

But doesn't work with 

CanAutocompleteSelectItems="False"

as it selects the first line with 'PK...' as soon as I enter 'pk'

 

[Yana]

Hi Vitali,

Regarding CanAutocompleteSelectItems - please note that this property is applicable only when the DropDown of the ComboBox is open.

So, in the concrete case, I have tested the provided code with a two way binding of the SelectedItem property and it is not updated when the dropdown is open and CanAutocompleteSelectItems is false.
It is expected that the first found item that match the entered text will be highlighted.

Could you please describe the expected result, so we to be able to provide proper assistance?

Regards,
Yana
Telerik

[iahulg]

Hi, Yana. 
Thanks you for your reply.
I actually managed to solve this issue using another control:
XAML:

<telerik:RadAutoCompleteBox ItemsSource="{Binding PickTickets}"
                   SelectedItem="{Binding SelectedPickTicket, Mode=TwoWay }"
                   DisplayMemberPath="PickTicketIdentity"
                   MinWidth="100"
                   TextSearchMode="Contains"
                   AutoCompleteMode="Suggest"
                   SelectionMode="Single"
                   KeyUp="RadAutoCompleteBox_KeyUp"/>

Codebehind:

private void RadAutoCompleteBox_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
{
      var racb = sender as RadAutoCompleteBox;
      if (!racb.IsDropDownOpen && racb.SearchText?.Length >= 2)
      {
          racb.IsDropDownOpen = true;
      } else if (racb.IsDropDownOpen && racb.SearchText?.Length < 2)
      {
          racb.IsDropDownOpen = false;
      }
}