您可以使用MultiValueConverter。通过转换器的文本和插入索引。做字符串操作并从转换器返回单词。
public class StringConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string text = values[0].ToString();
int index = (int)values[1];
if (String.IsNullOrEmpty(text))
{
return null;
}
int lastIndex = text.IndexOf(' ', index);
int firstIndex = new String(text.Reverse().ToArray()).IndexOf(' ', index);
return text.Substring(firstIndex, lastIndex - firstIndex);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
XAML看起来像这样,
<TextBox.InputBindings>
<KeyBinding Key="LeftCtrl"
Command="{Binding LeftCtrlKeyPressed}">
<KeyBinding.CommandParameter>
<MultiBinding Converter="{StaticResource StringConverter}">
<Binding ElementName="txt"
Path="Text" />
<Binding ElementName="txt"
Path="CaretIndex" />
</MultiBinding>
</KeyBinding.CommandParameter>
</KeyBinding>
</TextBox.InputBindings>
'CommandParameter'不允许依赖特性。 – Herdo 2014-09-24 06:48:45
好的。在那种情况下,我是否有其他选择来实现这一目标? – ifti24 2014-09-24 06:50:29