Bagaimana cara saya mendapatkan tanggal hanya dari datepicker di WPF?

Saya memiliki DatePicker bagi pengguna untuk memilih tanggal secara manual, dan tanggal ini masuk sebagai nilai untuk item yang dipilih di datagrid saya.

namun, ini ditampilkan sebagai ’23/01/2023 12:00:00′, misalnya.
Saya ingin ini ditampilkan sebagai ’23/01/2023′.

Saya memiliki kode saya sebagai berikut:

    public partial class Shortlist : Window
    {
     
//        public ObservableCollection<ShortlistedClient> shlclients { get; set; } = new ObservableCollection<ShortlistedClient>();
        List<ShortlistedClient1> shlclients = new List<ShortlistedClient1>();

        public DateTime? SelectedDateFormat { get; private set; }

        public Shortlist()
        {
            InitializeComponent();
        //    createShClientList();
            DataContext = shlclients;
            shlclients.Add(new ShortlistedClient1("Rich", "07515118265", "rich@gmail.com", "Glasgow", "Office", "MSc", "more than 3 years", "Yes", "No"));
            shlclients.Add(new ShortlistedClient1("Steve", "07515118265", "steve@gmail.com", "Glasgow", "Construction", "High School", "more than 3 years", "Yes", "No"));
            shlclients.Add(new ShortlistedClient1("Maria", "07485999005", "mb@gmail.com", "Edinburgh", "Office", "MSc", "more than 3 years", "No", "No"));
        }

        

        // method to add date to each selected client
        private void addInterviewDT(object sender, RoutedEventArgs e)
        {
            ShortlistedClient sc = dgr.SelectedItem as ShortlistedClient;

            if (sc != null )
            {
                sc.DT = DatePick.SelectedDate;
            }

maka definisi kelas saya seperti ini:

public class ShortlistedClient1 : Client, INotifyPropertyChanged
{
    private DateTime? _dt;

    public DateTime?  DT
    {
        get { return _dt; }
        set { _dt = value; NotifyPropertyChanged(); }
    }

    public bool InterestedinVac { get; private set; }


    public List<ShortlistedClient> clients { get; set; } = new List<ShortlistedClient1>();
    public ShortlistedClient(string n, string p, string e, string l, string wt, string q, string we, string dl, string cc) : base(n, p, e, l, wt, q, we, dl, cc)
    {
        DT = new DateTime();
        InterestedinVac = true;
    }

Apa yang saya coba:

I have tried changing DateOnly? to DateTime? in my ShortlistedClient class, and then set { _dt = value.ToShortDateString(); .. }   but it gives an error as well.

and I have tried
```
private DateTime _dt;

        public DateTime  DT
        {
            get { return _dt; }
            set { _dt = value.Date; NotifyPropertyChanged(); }
        }

        public bool InterestedinVac { get; private set; }

        public List<ShortlistedClient> clients { get; set; } = new List<ShortlistedClient>();
        public ShortlistedClient(string n, string p, string e, string l, string wt, string q, string we, string dl, string cc) : base(n, p, e, l, wt, q, we, dl, cc)
        {
            DT = new DateTime(); 
            InterestedinVac = true; 
        }

```
which gives:
```
Error	CS0266	Cannot implicitly convert type 'System.DateTime?' to 'System.DateTime'. An explicit conversion exists (are you missing a cast?)

Solusi 1
Solusi 3

Solusi 1

Anda dapat mengatur format tanggal di Data Binding. Misalnya:

XML

<DataGridTextColumn Binding="{StartDate, StringFormat=\{0:dd.MM.yy\}}" />

DIPERBARUI

Terkadang dalam situasi ini, akan sangat membantu jika membuat proyek prototipe untuk menguji fitur tertentu sebelum mengimplementasikannya dalam proyek utama Anda. Saya telah melakukan ini di sini untuk Anda dalam proyek demo singkat yang menunjukkan cara kerjanya:

1. Model Data

public class Widget
{
    public string? Name { get; set; }
    public DateTime? Date { get; set; }
}

2. Kode Dibalik

public partial class MainWindow : Window
{
    private Random random = new();
    public ObservableCollection<Widget> Widgets { get; set; } = new();

    public MainWindow()
    {
        CreateWidgets();
        InitializeComponent();
    }

    private void CreateWidgets()
    {
        for (int i = 0; i < 10; i++)
        {
            Widgets.Add(new()
            {
                Name = $"Widget {i}", 
                Date = DateTime.Now.AddDays(random.NextDouble() * 5)
            });
        }
    }
}

3. Jendela:

XML

<Window x:Class="WpfDataGridDateColumnFormatting.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        x:Name="Window"
        Title="MainWindow" Height="450" Width="800">

    <DataGrid DataContext="{Binding ElementName=Window}"
              ItemsSource="{Binding Widgets}"
              AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Name"
                                Binding="{Binding Name}" />
            <DataGridTextColumn Header="Date"
                                Binding="{Binding Date,
                                          StringFormat=\{0:dd.MM.yy\}}" />
        </DataGrid.Columns>
    </DataGrid>
</Window>

Output berfungsi seperti dijelaskan di atas.

Solusi 3

Agak terlambat, tapi masalahnya mungkin koma yang hilang setelah ‘DT’ di:

<datagridtextcolumn header="Interview Date" Binding="{Binding DT StringFormat=\{0:dd.MM.yy\}}" />