I am creating a date picker in my code and want to change its background whenever its value is not valid(specified by IsValidFieldValue flag), but its not working .
Here is my code for creating the control and style :
// Binding to be set for control |
Binding binding = new Binding("Value"); |
binding.Mode = BindingMode.TwoWay; |
binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged; |
string datePickerXamlTemplate = "<telerik:RadDatePicker x:Name=\"uxDatePickerCustomField{0}\" Grid.Row=\"1\" Grid.Column=\"1\" Height=\"24\" HorizontalAlignment=\"Left\" Margin=\"8,5,8,5\" Width=\"125\" xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" xmlns:telerik=\"clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input\" xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\" />"; |
string datePickerXaml = string.Format(datePickerXamlTemplate, field.Id, count); |
stream = new MemoryStream(ASCIIEncoding.Default.GetBytes(datePickerXaml)); |
RadDatePicker datePicker = (RadDatePicker)System.Windows.Markup.XamlReader.Load(stream); |
datePicker.SetBinding(RadDatePicker.SelectedDateProperty, binding); |
datePicker.Style = (Style)FindResource("DatePickerStyle"); |
datePicker.DataContext = field; // Object having properties - Value and IsValidFieldValue. Implements INotifyPropertyChanged |
uxGrid.Children.Add(datePicker); // Added to a Grid |
<UserControl.Resources> |
<Style TargetType="{x:Type telerikInput:RadDatePicker}" x:Key="DatePickerStyle"> |
<Style.Triggers> |
<DataTrigger Binding="{Binding Path=IsValidFieldValue, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" Value="false"> |
<Setter Property="telerikInput:RadDatePicker.Background" Value="#FFFFB9B9" /> |
</DataTrigger> |
</Style.Triggers> |
</Style> |
</UserControl.Resources> |