FrameworkElementFactory: Binding doesn't work
17 Replies
Hi Harald,
Your requirement can be achieve by handling GotFocus and LostFocus events of editable TextBox in the template. I have modified the sample to achieve your requirement. Please find the code snippet and sample below,
|
public class DataTemplateSelectorExt : DataTemplateSelector
{
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item == null || container == null)
return base.SelectTemplate(item, container);
if ((item as DataItem).ItemType == 1)
{
var factory1 = new FrameworkElementFactory(typeof(TextBlock));
factory1.SetBinding(TextBlock.TextProperty, new Binding("ItemName"));
factory1.SetValue(TextBlock.ForegroundProperty, Brushes.Black);
factory1.SetValue(TextBlock.BackgroundProperty, Brushes.Aquamarine);
return new DataTemplate { VisualTree = factory1 };
}
else if ((item as DataItem).ItemType == 2)
{
var factory2 = new FrameworkElementFactory(typeof(TextBox));
factory2.SetBinding(TextBox.TextProperty, new Binding("ItemShortName"));
factory2.SetValue(TextBox.ForegroundProperty, Brushes.Black);
factory2.SetValue(TextBox.IsReadOnlyProperty, true);
factory2.SetValue(TextBox.HorizontalContentAlignmentProperty, HorizontalAlignment.Right);
factory2.SetValue(Syncfusion.UI.Xaml.Grid.FocusManagerHelper.FocusedElementProperty, true);
factory2.SetValue(TextBox.BackgroundProperty, Brushes.Coral);
factory2.AddHandler(TextBox.GotFocusEvent, new RoutedEventHandler(ReadOnlyTextBox_GotFocus));
return new DataTemplate { VisualTree = factory2 };
}
else
{
var factory3 = new FrameworkElementFactory(typeof(TextBox));
factory3.SetBinding(TextBox.TextProperty, new Binding("Value") { Converter = new NumberRounOffConverter() });
factory3.SetValue(TextBox.ForegroundProperty, Brushes.Black);
factory3.SetValue(TextBox.HorizontalContentAlignmentProperty, HorizontalAlignment.Right);
factory3.SetValue(Syncfusion.UI.Xaml.Grid.FocusManagerHelper.FocusedElementProperty, true);
factory3.SetValue(TextBox.BackgroundProperty, Brushes.Yellow);
factory3.AddHandler(TextBox.GotFocusEvent, new RoutedEventHandler(EditTextBox_GotFocus));
factory3.AddHandler(TextBox.LostFocusEvent, new RoutedEventHandler(EditTextBox_LostFocus));
return new DataTemplate { VisualTree = factory3 };
}
return base.SelectTemplate(item, container);
}
//To display value with decimal digits when focusing.
private void EditTextBox_GotFocus(object sender, RoutedEventArgs e)
{
TextBox tb = (sender as TextBox);
tb.SetBinding(TextBox.TextProperty, new Binding("Value"));
tb.Dispatcher.BeginInvoke(new Action(() =>
{
tb.SelectAll();
}), System.Windows.Threading.DispatcherPriority.ApplicationIdle);
}
//To display value by rounding off after editing
private void EditTextBox_LostFocus(object sender, RoutedEventArgs e)
{
TextBox tb = (sender as TextBox);
tb.SetBinding(TextBox.TextProperty, new Binding("Value") { Converter = new NumberRounOffConverter() });
}
private void ReadOnlyTextBox_GotFocus(object sender, RoutedEventArgs e)
{
TextBox tb = (sender as TextBox);
tb.Dispatcher.BeginInvoke(new Action(() =>
{
tb.SelectAll();
}), System.Windows.Threading.DispatcherPriority.ApplicationIdle);
}
} |
Here, When you focus the TextBox only it will display the value with decimal digits. Otherwise, it will display the round-off values only.
Sample:
Thanks,
Sivakumar
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