public static void ClearControl(ExecutedRoutedEventArgs args)
{
if (args.Handled)
{
return;
}
if (args.OriginalSource is not DependencyObject control || false == TextBoxHelper.GetClearTextButton(control))
{
return;
}
switch (control)
{
case RichTextBox richTextBox:
richTextBox.Document?.Blocks?.Clear();
richTextBox.Selection?.Select(richTextBox.CaretPosition, richTextBox.CaretPosition);
break;
case DatePicker datePicker:
datePicker.SetCurrentValue(DatePicker.SelectedDateProperty, null);
datePicker.SetCurrentValue(DatePicker.TextProperty, null);
datePicker.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
break;
case TimePickerBase timePicker:
timePicker.SetCurrentValue(TimePickerBase.SelectedDateTimeProperty, null);
timePicker.GetBindingExpression(TimePickerBase.SelectedDateTimeProperty)?.UpdateSource();
break;
case TextBox textBox:
textBox.Clear();
textBox.GetBindingExpression(TextBox.TextProperty)?.UpdateSource();
break;
case PasswordBox passwordBox:
passwordBox.Clear();
passwordBox.GetBindingExpression(PasswordBoxBindingBehavior.PasswordProperty)?.UpdateSource();
break;
case ComboBox comboBox:
{
if (comboBox.IsEditable)
{
comboBox.SetCurrentValue(ComboBox.TextProperty, null);
comboBox.GetBindingExpression(ComboBox.TextProperty)?.UpdateSource();
}
comboBox.SetCurrentValue(ComboBox.SelectedItemProperty, null);
comboBox.GetBindingExpression(ComboBox.SelectedItemProperty)?.UpdateSource();
break;
}
}
}
private static void CanClearControl(CanExecuteRoutedEventArgs args)
{
if (args.Handled)
{
return;
}
if (args.OriginalSource is not DependencyObject control || false == TextBoxHelper.GetClearTextButton(control))
{
return;
}
args.CanExecute = control switch
{
DatePicker datePicker => !ControlsHelper.GetIsReadOnly(datePicker),
TimePickerBase timePicker => !timePicker.IsReadOnly,
TextBoxBase textBox => !textBox.IsReadOnly,
ComboBox comboBox => !comboBox.IsReadOnly,
_ => true
};
}