Question

我正在为WPF编写自定义的DateTimePicker类，但我似乎无法从父级获取绑定值。

父：

<cc:DateTimePicker DTSelectedDate="{Binding RA_EFFECTIVE_DATE}" />

子：

public partial class DateTimePicker : UserControl
{



    public DateTime DTSelectedDate  { get; set; }


    public static readonly DependencyProperty DateProperty = DependencyProperty.Register
    (
            "DTSelectedDate", 
            typeof(DateTime),
            typeof(DateTimePicker)
    );



    public DateTimePicker()
    {

        InitializeComponent();
        this.DataContext = this;


    }

}

儿童XAML：

<DatePicker SelectedDate="{Binding DTSelectedDate}" Width="150"/>

我在构造函数中使用调试器停止了，但似乎无法从父级获取任何值。

Answer 1

public static readonly DependencyProperty SelectedDateProperty =
    DependencyProperty.Register("SelectedDate", typeof(DateTime), typeof(DateTimePicker));

public DateTime SelectedDate
{
    get { return (DateTime)GetValue(SelectedDateProperty); }
    set { SetValue(SelectedDateProperty, value); }
}

同时编辑您的孩子XAML：

<UserControl
           // the usual stuff that is already there
    x:Name="Me">

<DatePicker SelectedDate="{Binding ElementName=Me, Path=SelectedDate}"

...

将参数从父级传递到自定义控件WPF

1 个答案: