Datepicker:如何使用C#xamarin单击edittext时弹出datepicker

Question

如何在Xamarin.Android中的编辑文本点击或焦点事件中显示日期选择器弹出窗口？

Answer 1

尝试使用Xamarin.Forms这样的东西:

public class SamplePage : ContentPage
{
    public SamplePage ()
    {
        var editText = new Entry {
            Placeholder = "Select Date.",
        };

        var date = new DatePicker {
            IsVisible = false,
            IsEnabled = false,
        };

        var stack = new StackLayout {
            Orientation = StackOrientation.Vertical,
            Children = {editText, date}
        };

        editText.Focused += (sender, e) => {
            date.Focus();
        };
        date.DateSelected += (sender, e) => {
            editText.Text = date.Date.ToString();
        };

        Content = stack;
    }
}

编辑:

尝试使用Xamarin.Android这样的东西:

MyLayout.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editText" />
</LinearLayout>

MyLayoutActivity.cs

using System;
using Android.App;
using Android.OS;
using Android.Widget;

namespace AndiNative
{
    [Activity (Label = "MyLayoutActivity", MainLauncher = true)]            
    public class MyLayoutActivity: Activity
    {
        private static EditText editText;

        protected override void OnCreate (Bundle bundle)
        {
            base.OnCreate (bundle);
            SetContentView (Resource.Layout.DatePickerTest);

            editText = FindViewById<EditText> (Resource.Id.editText);

            editText.Click += (sender, e) => {
                DateTime today = DateTime.Today;
                DatePickerDialog dialog = new DatePickerDialog(this, OnDateSet, today.Year, today.Month - 1, today.Day);
                dialog.DatePicker.MinDate = today.Millisecond;
                dialog.Show();
            };
        }

        void OnDateSet(object sender, DatePickerDialog.DateSetEventArgs e)
        {
            editText.Text = e.Date.ToLongDateString();
        }
    }
}

Answer 2

对于那些喜欢MVVM的人。这是Xamarin Forms中的MVVM实现。我在这里使用事件命令行为。您可以从此链接Xamarin Event到Command Behaviors获得更多信息

Xaml

    <Entry Text="{Binding DateOfBirth, Mode=TwoWay}" />
    <Image Source="button.png" WidthRequest="39">
        <Image.GestureRecognizers>
            <TapGestureRecognizer Command="{Binding OnSelectDOBCommand}" CommandParameter="{Binding ., Source={Reference DOBPicker}}" />
        </Image.GestureRecognizers>
    </Image>
    <DatePicker x:Name="DOBPicker"
                Date="{Binding SelectedDOB}"
                IsEnabled="True"
                IsVisible="False">
        <DatePicker.Behaviors>
            <behaviors:DatePickerSelectedBehavior Command="{Binding DateSelectedCommand}" EventName="DateSelected" />
        </DatePicker.Behaviors>
    </DatePicker>

查看型号代码

OnSelectDOBCommand = new RelayCommand<DatePicker>(FocusDatePicker);
DateSelectedCommand = new RelayCommand(SetDateOfBirth);

现在，函数定义

    private void FocusDatePicker(DatePicker obj)
    {
        obj.Focus();
    }
    private void SetDateOfBirth()
    {
        DateOfBirth = SelectedDOB;
    }

希望这可以帮助某人

更新11/11/2016

另一种选择是使用ACR.Userdialogs简单明了。声明您的ICommand

 OnSelectDOBCommand = new RelayCommand(ShowDatePicker);

接下来定义函数ShowDatePicker

private void ShowDatePicker()
{            
   UserDialogs.Instance.DatePrompt(new DatePromptConfig { MaximumDate = MaxDate, OnAction = (result) => SetDateOfBirth(result), IsCancellable = true });
}

并设定生日功能

private void SetDateOfBirth(DatePromptResult result)
    {            
        if(result.Ok)
        {
            DateOfBirth = result.SelectedDate.ToString("dd MMM yyyy");
        }

    }

最好的部分是，您根本不需要任何特殊的Xaml。您可以将其挂接到任何按钮。

应该给艾伦一个奖项或其他