给datagridview添加一个自定义列类型-日期类型
1.新建一个类：
代码
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：
代码
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：
代码
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;
}
}
}
}