Wpf – ListBoxItem selection on TextBox focus

listboxselectiontextboxwpf

I have a ListBox showing items using the following DataTemplate:

<DataTemplate x:Key="PersonTemplate" DataType="{x:Type DAL:ResultItem}" >
  <StackPanel Width="280" >
    <TextBox BorderThickness="0" IsReadOnly="True" Background="Transparent" Text="{Binding FullName1, Mode=OneWay}"/>
    ... 
  </StackPanel>
</DataTemplate>

I am using a transparent, read-only, borderless TextBox as opposed to a TextBlock because I want users to be able to select the text for copying. Should I do it differently?
How can I write this so that when the user clicks on the TextBox, the ListBoxItem gets selected as well?

Thanks!

Best Answer

I found that the answer is just to do this from the ListBoxItem standpoint, adding the following to its DataTemplate:

<Style.Triggers>
  <Trigger Property="IsKeyboardFocusWithin" Value="True">
    <Setter Property="IsSelected" Value="True"/>
  </Trigger>
</Style.Triggers>

Related Solutions

C# – How to make a textbox that only accepts numbers

Two options:

Use a NumericUpDown instead. NumericUpDown does the filtering for you, which is nice. Of course it also gives your users the ability to hit the up and down arrows on the keyboard to increment and decrement the current value.

Handle the appropriate keyboard events to prevent anything but numeric input. I've had success with this two event handlers on a standard TextBox:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
        (e.KeyChar != '.'))
    {
            e.Handled = true;
    }

    // only allow one decimal point
    if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
    {
        e.Handled = true;
    }
}

You can remove the check for '.' (and the subsequent check for more than one '.') if your TextBox shouldn't allow decimal places. You could also add a check for '-' if your TextBox should allow negative values.

If you want to limit the user for number of digit, use: textBox1.MaxLength = 2; // this will allow the user to enter only 2 digits

.net – How to automatically select all text on focus in WPF TextBox

We have it so the first click selects all, and another click goes to cursor (our application is designed for use on tablets with pens).

You might find it useful.

public class ClickSelectTextBox : TextBox
{
    public ClickSelectTextBox()
    {
        AddHandler(PreviewMouseLeftButtonDownEvent, 
          new MouseButtonEventHandler(SelectivelyIgnoreMouseButton), true);
        AddHandler(GotKeyboardFocusEvent, 
          new RoutedEventHandler(SelectAllText), true);
        AddHandler(MouseDoubleClickEvent, 
          new RoutedEventHandler(SelectAllText), true);
    }

    private static void SelectivelyIgnoreMouseButton(object sender, 
                                                     MouseButtonEventArgs e)
    {
        // Find the TextBox
        DependencyObject parent = e.OriginalSource as UIElement;
        while (parent != null && !(parent is TextBox))
            parent = VisualTreeHelper.GetParent(parent);

        if (parent != null)
        {
            var textBox = (TextBox)parent;
            if (!textBox.IsKeyboardFocusWithin)
            {
                // If the text box is not yet focussed, give it the focus and
                // stop further processing of this click event.
                textBox.Focus();
                e.Handled = true;
            }
        }
    }

    private static void SelectAllText(object sender, RoutedEventArgs e)
    {
        var textBox = e.OriginalSource as TextBox;
        if (textBox != null)
            textBox.SelectAll();
    }
}

Best Answer

Related Solutions

C# – How to make a textbox that only accepts numbers

.net – How to automatically select all text on focus in WPF TextBox

Related Topic