参考我的另一个问题:
我已经这个datagridcomboxcolumn:
<DataGridComboBoxColumn Header="Master" SelectedItemBinding="{Binding MasterId}" SelectedValueBinding="{Binding Id}" DisplayMemberPath="Id" ItemsSource="{Binding Data.Masters, Converter={converters:SimpleComboItemConverter}, Source={StaticResource proxy}}" />
我为试图将值保存到行时引起的运行时错误创建了此ivalueconverter。
[ValueConversion(typeof(string), typeof(SimpleComboItem<>))]
public class SimpleComboItemConverter : MarkupExtension, IValueConverter
{
public static SimpleComboItemConverter converter;
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (null == converter)
{
converter = new SimpleComboItemConverter();
}
return converter;
}
}
但是,当内部调试时,转换方法具有价值的iEnumerable对象,而不是string
和SimpleComboBoxItem<>
SimpleComboboxItem类它非常简单,并且列中的ComboBox显示正确的值:
public class SimpleComboItem<T>
{
public T Value { get; set; }
public string Text { get; set; }
}
我在做什么错?
问题在XAML中,您将ID映射为项目。您必须使用选定的valuebinding而不是selecteditembinding。