在 C# Xamarin 中更改 DateFomat

Question

我正在与 Android 一起开发 Xamarin。我在下面的 Project.The 代码中使用了 DatePicker。

OnCreate 方法中的代码。

protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.Activity_register);

            tiebirthdate = FindViewById<TextInputEditText>(Resource.Id.tiebirthdate);
            tiebirthdate.Click += DateSelect_OnClick;

       }


void DateSelect_OnClick(object sender, EventArgs e)
        {
            DatePickerFragment frag = DatePickerFragment.NewInstance(delegate (DateTime time)
            {

                var dateAndTime = time;

                var tt = dateAndTime.Date;
                tiebirthdate.Text = tt.ToString("dd/MM/yyyy");

            });
            frag.Show(FragmentManager, DatePickerFragment.TAG);
        }

创建Class。

class DatePickerFragment : DialogFragment,
                                  DatePickerDialog.IOnDateSetListener
    {
        public static readonly string TAG = "X:" + typeof(DatePickerFragment).Name.ToUpper();

        // Initialize this value to prevent NullReferenceExceptions.
        Action<DateTime> _dateSelectedHandler = delegate { };

        public static DatePickerFragment NewInstance(Action<DateTime> onDateSelected)
        {
            DatePickerFragment frag = new DatePickerFragment();
            frag._dateSelectedHandler = onDateSelected;
            return frag;
        }

        public override Dialog OnCreateDialog(Bundle savedInstanceState)
        {
            DateTime currently = DateTime.Now;
            DatePickerDialog dialog = new DatePickerDialog(Activity,
                                                           this,
                                                           currently.Year,
                                                           currently.Month,
                                                           currently.Day);
            return dialog;
        }

        public void OnDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth)
        {
            DateTime selectedDate = new DateTime(year, monthOfYear + 1, dayOfMonth);

            _dateSelectedHandler(selectedDate);

        }
    }

在我尝试之后，我最终设置了 DateTime 这样的格式 "dd/MM/yyyy"。但是我的服务器需要这样的日期格式 "yyyy-MM-dd'T'HH:mm:ss'Z'" 。那么如何更改 DateTime 格式，如 upper.

不胜感激。

Answer 1

tiebirthdate.Text = dateAndTime.ToString("yyyy-MM-dd'T'HH:mm:ss'Z'", CultureInfo.InvariantCulture);

你可以这样试试

Answer 2

您可以使用DateTime.ParseExact方法。请参阅引用的 MSDN 页面中的示例。

在 C# Xamarin 中更改 DateFomat

Change DateFomat in C# Xamarin

c#

date

date-format

xamarin.android

xamarin