DataGridView扩展：DateTimePicker

代码转自CSDN部分修改：

Code
using System;
using System.Windows.Forms;

namespace CuteDataView
{
    public class CalendarColumn : DataGridViewColumn
    {
        public CalendarColumn(): base(new CalendarCell())
        {
        }

        public override DataGridViewCell CellTemplate
        {
            get { return base.CellTemplate; }
            set
            {
                if (value != null &&!value.GetType().IsAssignableFrom(typeof (CalendarCell)))
                {
                    throw new InvalidCastException("Must   be   a   CalendarCell ");
                }
                base.CellTemplate = value;
            }
        }
    }

    public class CalendarCell : DataGridViewTextBoxCell
    {
        /// <summary>
        /// 编辑控件的类型
        /// </summary>
        public override Type EditType
        {
            get { return typeof (CalendarEditingControl); }
        }

        public override Type ValueType
        {
            get { return typeof (DateTime); }
        }

        public override object DefaultNewRowValue
        {
            get { return DateTime.Now; }
        }

        public override void InitializeEditingControl(int rowIndex, object initialFormattedValue,
                                                                          DataGridViewCellStyle dataGridViewCellStyle)
        {
            base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
            var ctl =DataGridView.EditingControl as CalendarEditingControl;
            if (ctl != null) ctl.Text = Value.ToString();
        }
        //如果自定义Cell有public属性。建议实现Clone方法
        public override object Clone()
        {
            return new CalendarCell();
        }
    }

    internal class CalendarEditingControl : DateTimePicker, IDataGridViewEditingControl
    {
        private DataGridView _dataGridView;
        private int _rowIndex;
        private bool _valueChanged ;

        #region IDataGridViewEditingControl Members

        public object EditingControlFormattedValue
        {
            get { return Value.ToLongDateString(); }
            set
            {
                var newValue = value as String;
                if (newValue != null)
                {
                    Value = DateTime.Parse(newValue);
                }
            }
        }


        public object GetEditingControlFormattedValue(DataGridViewDataErrorContexts context)
        {
            return EditingControlFormattedValue;
        }

        public void ApplyCellStyleToEditingControl(DataGridViewCellStyle dataGridViewCellStyle)
        {
            Font = dataGridViewCellStyle.Font;
            CalendarForeColor = dataGridViewCellStyle.ForeColor;
            CalendarMonthBackground = dataGridViewCellStyle.BackColor;
        }

        public int EditingControlRowIndex
        {
            get { return _rowIndex; }
            set { _rowIndex = value; }
        }

        public bool EditingControlWantsInputKey(Keys key, bool dataGridViewWantsInputKey)
        {
            switch (key & Keys.KeyCode)
            {
                case Keys.Left:
                case Keys.Up:
                case Keys.Down:
                case Keys.Right:
                case Keys.Home:
                case Keys.End:
                case Keys.PageDown:
                case Keys.PageUp:
                    return true;
                default:
                    return false;
            }
        }


        public void PrepareEditingControlForEdit(bool selectAll)
        {
        }

        public bool RepositionEditingControlOnValueChange
        {
            get { return false; }
        }

        public DataGridView EditingControlDataGridView
        {
            get { return _dataGridView; }
            set { _dataGridView = value; }
        }

        public bool EditingControlValueChanged
        {
            get { return _valueChanged; }
            set { _valueChanged = value; }
        }

        public Cursor EditingPanelCursor
        {
            get { return base.Cursor; }
        }

        #endregion

        protected override void OnValueChanged(EventArgs eventargs)
        {
            _valueChanged = true;
            EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }
}