DataGridView添加DateTimePicker

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
    ...{

        public CalendarCell()
            : base()
        ...{

            // this.Style.Format = "d ";
        }

        public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        ...{

            base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
            CalendarEditingControl ctl = DataGridView.EditingControl as CalendarEditingControl;
            ctl.Value = Convert.ToDateTime(this.Value.ToString());
        }

        public override Type EditType
        ...{
            get
            ...{
                return typeof(CalendarEditingControl);
            }
        }

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

        public override object DefaultNewRowValue
        ...{
            get
            ...{
                DateTime a = Convert.ToDateTime("00:00:00");
                return a;
            }
        }
    }

    class CalendarEditingControl : DateTimePicker, IDataGridViewEditingControl
    ...{

        DataGridView dataGridView;
        private bool valueChanged = false;
        int rowIndex;

        public CalendarEditingControl()
        ...{
//            this.Format = DateTimePickerFormat.Time;
            this.Format = DateTimePickerFormat.Custom;
            this.CustomFormat = "HH:mm";

            
            this.ShowUpDown = true;
        }


        public object EditingControlFormattedValue
        ...{
            get
            ...{
               
                return this.Value.ToLongTimeString();
            }
            set
            ...{
                String newValue = value as String;

                if (newValue != null)
                ...{

                    this.Value = Convert.ToDateTime(newValue);
                }
            }
        }


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



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

        protected override void OnValueChanged(EventArgs eventargs)
        ...{

            valueChanged = true;

            this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
            base.OnValueChanged(eventargs);
        }
    }