学步园

1.新建一个类：

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
namespace winclient
{
class dateEdit:DateTimePicker,IDataGridViewEditingControl
    {
private DataGridView grid;
private bool valuechanged=false;
int rowindex;

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

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

public object EditingControlFormattedValue
        {
get
            {
return this.Value.ToShortDateString();
            }
set
            {
if (value != null)
this.Value = Convert.ToDateTime(value);
            }
        }

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

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

public bool EditingControlWantsInputKey(Keys keyData, bool dataGridViewWantsInputKey)
        {
switch (keyData & 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 Cursor EditingPanelCursor
        {
get { return base.Cursor; }
        }

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

public void PrepareEditingControlForEdit(bool selectAll)
        {

        }

public bool RepositionEditingControlOnValueChange
        {
get { return false; }
        }

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

 

2.定义一个单元格：

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
namespace winclient
{
　　public class DateCell : DataGridViewTextBoxCell
    {
        private DateEdit ne;
        public DateCell() : base() { }
        public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
        {
            base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
            ne = DataGridView.EditingControl as DateEdit;
            ne.Value = Convert.ToDateTime(this.Value);
            if (ne != null)
            {
                ne.Format = DateTimePickerFormat.Custom;
                ne.CustomFormat = dataGridViewCellStyle.Format;
                ne.ShowUpDown = ((DateColumn)this.OwningColumn).ShowUpDown;
            }
        }
        public override Type EditType
        {
            get
            {
                return typeof(DateEdit);
            }
        }
        public override Type ValueType
        {
            get
            {
                return typeof(DateTime);
            }
        }
        protected override object GetValue(int rowIndex)
        {
            return base.GetValue(rowIndex);
        }
        public override object DefaultNewRowValue
        {
            get
            {
                return DateTime.Now;
            }
        }
    }
}

 

 

3.定义列：

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace winclient
{
class datecolumn:DataGridViewColumn
    {
private bool showupdown = true;

public bool Showupdown
        {
get { return showupdown; }
set { showupdown = value; }
        }

public datecolumn() : base(new datecell()) { }

public override DataGridViewCell CellTemplate
        {
get
            {
return base.CellTemplate;
            }
set
            {
if (value != null && !value.GetType().IsAssignableFrom(typeof(datecell)))
throw new InvalidCastException("列中只能使用日期单元格");
base.CellTemplate = value;
            }
        }
    }
}