How to set focus in a textbox when user click an expander?

Question

I have an expander...and a textbox. The textbox is hidden by default. when user click on the expander, I am displaying the text box. This is working fine.

What I need is, when user click on the expander...I need to set the focus in the textbox.

Please help me to do this...I tried with following code...but it seems "IsFocused" is readonly property.

Any help would be appreciated !

<StackPanel>
  <DockPanel>
    <TextBlock DockPanel.Dock="Left"  Text="ID"/>
      <Expander x:Name="ID" DockPanel.Dock="Right" IsExpanded="False" ExpandDirection="Down">                                                    
      </Expander>
  </DockPanel>
  <TextBox Text="{Binding Path=SearchCCCId.Value,UpdateSourceTrigger=PropertyChanged}" 
     Visibility="{Binding ElementName=ID,Path=IsExpanded,Converter={x:Static local:Converters.BoolToVisibility}}"  Width="70" >
   <TextBox.Style>
     <Style>
        <Style.Triggers>
           <DataTrigger Binding="{Binding ElementName=ID, Path=IsEpanded}" Value="True" >
              <Setter Property="IsFocused" Value="True" />
           </DataTrigger>
         </Style.Triggers>
     </Style>
    </TextBox.Style>
   </TextBox>
</StackPanel>

score 1 · Answer 1 · edited Nov 18 '16 at 16:34

With all your help, I am able to find out the answer...

<TextBox.Style>
    <Style>
        <Style.Triggers>
            <DataTrigger Binding="{Binding ElementName=ID, Path=IsExpanded}" Value="True">
                <Setter Property="FocusManager.FocusedElement" 
                        Value="{Binding ElementName=PropertyIDSearch}"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</TextBox.Style>

score 0 · Answer 2 · answered Oct 15 '11 at 05:28

0

You can handler Expanded event of Expander and set focus inside handler method.

private void OnExpanderExpanded(object sender, RoutedEventArgs args)
{
    txtTest.Focus();
}

answered Oct 15 '11 at 05:28

Ekk

5,627
19
27

score 0 · Accepted Answer · edited May 23 '17 at 10:32

0

IsFocused is ReadOnly property. You may want to look at these -

How to set focus to textbox using MVVM?

WPF - Set Focus when a button is clicked - No Code Behind

edited May 23 '17 at 10:32

Community

1
1

answered Oct 15 '11 at 05:30

Rohit Vats

79,502
12
161
185

How to set focus in a textbox when user click an expander?

3 Answers3