The question has been asked a couple of times, unfortunately the answers only apply to WPF. Anyone know how to accomplish this in silverlight? Basically I need to focus on a certain textbox from code.
Following class is required in view model
public class FocusBehavior : Behavior
{
protected override void OnAttached()
{
AssociatedObject.GotFocus += (sender, args) => IsFocused = true;
AssociatedObject.LostFocus += (sender, a) => IsFocused = false;
AssociatedObject.Loaded += (o, a) => { if (HasInitialFocus || IsFocused) AssociatedObject.Focus(); };
base.OnAttached();
}
public static readonly DependencyProperty IsFocusedProperty =
DependencyProperty.Register(
"IsFocused",
typeof(bool),
typeof(FocusBehavior),
new PropertyMetadata(false, (d, e) => { if ((bool)e.NewValue) ((FocusBehavior)d).AssociatedObject.Focus(); }));
public bool IsFocused
{
get { return (bool)GetValue(IsFocusedProperty); }
set { SetValue(IsFocusedProperty, value); }
}
public static readonly DependencyProperty HasInitialFocusProperty =
DependencyProperty.Register(
"HasInitialFocus",
typeof(bool),
typeof(FocusBehavior),
new PropertyMetadata(false, null));
public bool HasInitialFocus
{
get { return (bool)GetValue(HasInitialFocusProperty); }
set { SetValue(HasInitialFocusProperty, value); }
}
}
Add name space reference in Xaml file like as
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
and give initial value and binding value like as below
<TextBlock Height="20" HorizontalAlignment="Left" Margin="10,16,0,0" Text="Sales Order No" TextWrapping="Wrap" VerticalAlignment="Top" Width="91" />
<TextBox Height="22" HorizontalAlignment="Left" Margin="115,13,0,0" MaxLength="20" Name="txtSalesOrderNo" TabIndex="0" TextWrapping="Wrap" VerticalAlignment="Top" Width="165" Text="{Binding Path=SaleOrderNo, Mode=TwoWay}" >
<i:Interaction.Behaviors>
<Local1:FocusBehavior HasInitialFocus="False" IsFocused="{Binding SaleOrderFocus, Mode=TwoWay}"/>
</i:Interaction.Behaviors>
</TextBox>
