Shows how to use a Windows Forms DateTimePicker in the wpf platform of Eto.Forms

MyDateTimePickerHandler.cs

using Eto.Forms;
using Eto.Platform.Wpf.Forms;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using swf = System.Windows.Forms;

namespace Eto.Test.Wpf
{
    public class MyDateTimePickerHandler : WpfFrameworkElement<swf.Integration.WindowsFormsHost, DateTimePicker>, IDateTimePicker
    {
        swf.DateTimePicker picker;

        public MyDateTimePickerHandler()
        {
            picker = new System.Windows.Forms.DateTimePicker();
            picker.ShowCheckBox = true;
            Mode = DateTimePicker.DefaultMode;
            Value = null;
            picker.ValueChanged += delegate
            {
                Widget.OnValueChanged(EventArgs.Empty);
            };
            Control = new swf.Integration.WindowsFormsHost();
            Control.Child = picker;
        }

        public DateTimePickerMode Mode
        {
            get
            {
                switch (picker.Format)
                {
                    case System.Windows.Forms.DateTimePickerFormat.Long:
                        return DateTimePickerMode.DateTime;
                    case System.Windows.Forms.DateTimePickerFormat.Short:
                        return DateTimePickerMode.Date;
                    case System.Windows.Forms.DateTimePickerFormat.Time:
                        return DateTimePickerMode.Time;
                    default:
                        throw new NotImplementedException();
                }
            }
            set
            {
                switch (value)
                {
                    case DateTimePickerMode.DateTime:
                        picker.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
                        var format = CultureInfo.CurrentUICulture.DateTimeFormat;
                        picker.CustomFormat = format.ShortDatePattern + " " + format.LongTimePattern;
                        break;
                    case DateTimePickerMode.Date:
                        picker.Format = System.Windows.Forms.DateTimePickerFormat.Short;
                        break;
                    case DateTimePickerMode.Time:
                        picker.Format = System.Windows.Forms.DateTimePickerFormat.Time;
                        break;
                    default:
                        throw new NotImplementedException();
                }
            }
        }

        public DateTime MinDate
        {
            get { return picker.MinDate; }
            set { picker.MinDate = value; }
        }

        public DateTime MaxDate
        {
            get { return picker.MaxDate; }
            set { picker.MaxDate = value; }
        }

        public DateTime? Value
        {
            get
            {
                if (!picker.Checked) return null;
                return picker.Value;
            }
            set
            {
                if (value != null)
                {
                    picker.Value = value.Value;
                    picker.Checked = true;
                }
                else
                    picker.Checked = false;
            }
        }

        public Drawing.Font Font
        {
            get; set;
        }

        public override Drawing.Color BackgroundColor
        {
            get; set;
        }
    }
}

Startup.cs

    class Startup
	{
		[STAThread]
		static void Main (string[] args)
		{
			var generator = new Eto.Platform.Wpf.Generator ();
            
            generator.Add<IDateTimePicker>(() => new MyDateTimePickerHandler());

			var app = new TestApplication (generator);
			app.Run (args);
		}

	}