相关疑难解决方法(0)

我目前正在尝试创建一个DataGridTemplateColumn可以在我们的许多应用程序中重用的自定义控件.我遇到了一些问题,在自定义控件上获取依赖属性以进行绑定并正确引发属性更改通知.

我目前有从DataGridTemplateColumnxaml 继承的控件如下所示:

<DataGridTemplateColumn x:Class="Controls.DataGridDateColumn"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <TextBlock HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding SelectedDate}"/>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
    <DataGridTemplateColumn.CellEditingTemplate>
        <DataTemplate>
            <Grid FocusManager.FocusedElement="{Binding ElementName=DatePicker}">
                <DatePicker Name="DatePicker" HorizontalAlignment="Left" VerticalAlignment="Center" SelectedDate="{Binding SelectedDate}"/>
            </Grid>
        </DataTemplate>
    </DataGridTemplateColumn.CellEditingTemplate>

而背后的代码看起来像这样

public partial class DataGridDateColumn : DataGridTemplateColumn
{

    public static readonly DependencyProperty SelectedDateProperty = 
        DependencyProperty.Register("SelectedDate", 
        typeof(DateTime?), 
        typeof(DataGridDateColumn),
        new FrameworkPropertyMetadata(null, OnSelectedDateChanged));

    private static void OnSelectedDateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        DataGridDateColumn col = (DataGridDateColumn)d;
        col.SelectedDate = (DateTime?)e.NewValue;
    }

    public DateTime? SelectedDate {
        get { 
            return (DateTime?)GetValue(SelectedDateProperty); 
        }
        set …