[Solved] RadDropDownButton - Textboxes ignore the first <space> character...

[Rob]

There was a very similar issue to this logged here.

And here is a simple project showing the problem.  Notice that when you attempt to enter a <space> in either of the TextBox controls, the first keypress seems to be ignored.  Subsequent <space> characters are ok.

<UserControl    x:Class="SilverlightApplication61.MainPage"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
>

<UserControl.Resources>
   <DataTemplate x:Key="LabelTemplate">
      <TextBlock Text="{Binding ., StringFormat='\{0\}:'}" VerticalAlignment="Center" Foreground="Green" FontSize="12" Margin="25,0,5,0" />
   </DataTemplate>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="White">

   <telerik:RadDropDownButton Height="50" Width="50" DropDownWidth="280">

      <telerik:RadDropDownButton.DropDownContent>

         <Grid>

            <Grid.RowDefinitions>
               <RowDefinition Height="Auto" />
               <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>

            <Grid.ColumnDefinitions>
               <ColumnDefinition Width="Auto" />
               <ColumnDefinition Width="1*" />
            </Grid.ColumnDefinitions>

            <telerik:Label Grid.Row="0" Grid.Column="0" Content="Field 1" ContentTemplate="{StaticResource LabelTemplate}" />
            <TextBox Grid.Row="0" Grid.Column="1" FontSize="14" Text="{Binding Field1, Mode=TwoWay}" Margin="0,4,3,2" />

            <telerik:Label Grid.Row="1" Grid.Column="0" Content="Field 2" ContentTemplate="{StaticResource LabelTemplate}" />
            <TextBox Grid.Row="1" Grid.Column="1" FontSize="14" Text="{Binding Field2, Mode=TwoWay}" Margin="0,4,3,2" />

         </Grid>

      </telerik:RadDropDownButton.DropDownContent>

   </telerik:RadDropDownButton>

</Grid>

</UserControl>

[Tina Stancheva]

Hi Rob,

This is a known issue that is logged in our PITS where you can track its progress. We will do our best to fix it as soon as possible and you can vote for it in order to increase its priority.

Regards,
Tina Stancheva
the Telerik team

[Juliana]

Hi there,
I use the following workaround for this problem

private void TextBox_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.Key)
            {
                case System.Windows.Input.Key.Space:
                    AddCharachterToTextBox((TextBox)e.OriginalSource, " " );
                    e.Handled = true;
                    break;
                case System.Windows.Input.Key.Enter:
                    AddCharachterToTextBox((TextBox)e.OriginalSource, "\n");
                    e.Handled = true;
                    break;
            }
        }
        
        void AddCharachterToTextBox(TextBox textBox, string newChar)
        {
            int position = textBox.SelectionStart;
            textBox.Focus();
            textBox.Text = textBox.Text.Insert(textBox.SelectionStart, newChar);
            textBox.SelectionStart = position + newChar.Length;
        }

HTH,
Juliana

[Tina Stancheva]

Hello Juliana,

Thank you for sharing your solution with the community. I am sure it will be highly appreciated.

Kind regards,
Tina Stancheva
the Telerik team