C＃WPF DatePicker绑定

Question

我将NULL属性绑定到DatePicker时遇到问题。 我第一次运行我的应用程序但在我将日期设置为从今天到正常工作后的7天范围内时所拥有的东西。 如果我在一周后选择日期，则属性设置为null。 一周后

public class Pledge
{
    public int ID { get; set; }
    public string ClientName { get; set; }
    public string Passport { get; set; }
    public string IssuedBy { get; set; }
    [Column(TypeName = "Date")]
    public DateTime? Birthday { get; set; }
    [Column(TypeName = "Date")]
    public DateTime? IssuedDate { get; set; }
    public string Registration { get; set; }
    public string Phone { get; set; }
    public string Model { get; set; }
    public string SerialNumber { get; set; }
    [Column(TypeName = "Date")]
    public DateTime? ReceiptDate { get; set; }
    [Column(TypeName = "Date")]
    public DateTime? IssueDate { get; set; }
    public decimal? Result { get; set; }
    public decimal? MoneyForClient { get; set; }
    public int? Procent { get; set; }
}

XAML：

<StackPanel>
                <TextBlock Text="ФИО:" Margin="4"/>
                <TextBox Text="{Binding Path=ClientName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Номер телефона:" Margin="4"/>
                <xctk:MaskedTextBox Text="{Binding Path=Phone, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Mask="+7 (000) 000-00-00"/>
                <TextBlock Text="Дата рождения:" Margin="4"/>
                <DatePicker Text="{Binding Path=Birthday, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Паспорт" Margin="4"/>
                <xctk:MaskedTextBox Text="{Binding Path=Passport, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Mask="0000-000000"/>
                <TextBlock Text="Дата выдачи:" Margin="4"/>
                <DatePicker Text="{Binding Path=IssuedDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Выдан:" Margin="4"/>
                <TextBox Text="{Binding Path=IssuedBy, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" TextWrapping="Wrap" AcceptsReturn="True" Height="100"/>
                <TextBlock Text="Прописка:" Margin="4"/>
                <TextBox Text="{Binding Path=Registration, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" TextWrapping="Wrap" AcceptsReturn="True" Height="100"/>
                <TextBlock Text="Модель:" Margin="4"/>
                <TextBox Text="{Binding Path=Model, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Серийный номер(IMEI):" Margin="4"/>
                <TextBox Text="{Binding Path=SerialNumber, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Сумма на выдачу:" Margin="4"/>
                <TextBox Text="{Binding Path=MoneyForClient, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Процент:" Margin="4"/>
                <TextBox Text="{Binding Path=Procent, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Дата приема:" Margin="4"/>
                <DatePicker Text="{Binding Path=ReceiptDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                <TextBlock Text="Дата выдачи:" Margin="4"/>
                <DatePicker Text="{Binding Path=IssueDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
            </StackPanel>

Answer 1

找到问题。 我感到困惑。 代替“文本”，有必要绑定到DatePicker中的“选定日期”。 是：

<DatePicker Text="{Binding Path=MoneyForClient, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>

应该：

<DatePicker SelectedDate="{Binding Path=MoneyForClient, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>