Vb.net DataGridView DateTimePicker列-添加长格式支持(日期和时间)
我正在尝试制作gridview Datetimepicker列,我成功了, 但我有一个小问题,当用户在gridview中编辑日期时 日期简写为“11/9/16”,但我想要的是日期和时间“11/9/16 2:34:45 AM” 这是我使用的代码: 日历列:Vb.net DataGridView DateTimePicker列-添加长格式支持(日期和时间),vb.net,winforms,datagridview,datetimepicker,datetime-format,Vb.net,Winforms,Datagridview,Datetimepicker,Datetime Format,我正在尝试制作gridview Datetimepicker列,我成功了, 但我有一个小问题,当用户在gridview中编辑日期时 日期简写为“11/9/16”,但我想要的是日期和时间“11/9/16 2:34:45 AM” 这是我使用的代码: 日历列: Imports System Imports System.Windows.Forms Public Class CalendarColumn Inherits DataGridViewColumn Public Sub New()
Imports System
Imports System.Windows.Forms
Public Class CalendarColumn
Inherits DataGridViewColumn
Public Sub New()
MyBase.New(New CalendarCell())
End Sub
Public Overrides Property CellTemplate() As DataGridViewCell
Get
Return MyBase.CellTemplate
End Get
Set(ByVal value As DataGridViewCell)
' Ensure that the cell used for the template is a CalendarCell.
If (value IsNot Nothing) AndAlso _
Not value.GetType().IsAssignableFrom(GetType(CalendarCell)) _
Then
Throw New InvalidCastException("Must be a CalendarCell")
End If
MyBase.CellTemplate = value
End Set
End Property
End Class
日历单元格:
Public Class CalendarCell
Inherits DataGridViewTextBoxCell
Public Sub New()
' Use the short date format.
'Me.Style.Format = "d"
End Sub
Public Overrides Sub InitializeEditingControl(ByVal rowIndex As Integer, _
ByVal initialFormattedValue As Object, _
ByVal dataGridViewCellStyle As DataGridViewCellStyle)
' Set the value of the editing control to the current cell value.
MyBase.InitializeEditingControl(rowIndex, initialFormattedValue, _
dataGridViewCellStyle)
Dim ctl As CalendarEditingControl = _
CType(DataGridView.EditingControl, CalendarEditingControl)
' Use the default row value when Value property is null.
If (Me.Value Is Nothing) Then
ctl.Value = CType(Me.DefaultNewRowValue, DateTime)
Else
ctl.Value = CType(Me.Value, DateTime)
End If
End Sub
Public Overrides ReadOnly Property EditType() As Type
Get
' Return the type of the editing control that CalendarCell uses.
Return GetType(CalendarEditingControl)
End Get
End Property
Public Overrides ReadOnly Property ValueType() As Type
Get
' Return the type of the value that CalendarCell contains.
Return GetType(DateTime)
End Get
End Property
Public Overrides ReadOnly Property DefaultNewRowValue() As Object
Get
' Use the current date and time as the default value.
Return DateTime.Now
End Get
End Property
End Class
日历编辑控件:
Class CalendarEditingControl
Inherits DateTimePicker
Implements IDataGridViewEditingControl
Private dataGridViewControl As DataGridView
Private valueIsChanged As Boolean = False
Private rowIndexNum As Integer
Public Sub New()
Me.Format = DateTimePickerFormat.Long
'Me.CustomFormat = "'Today is:' hh:mm:ss dddd MMMM dd, yyyy"
End Sub
Public Property EditingControlFormattedValue() As Object _
Implements IDataGridViewEditingControl.EditingControlFormattedValue
Get
Return Me.Value.ToShortDateString()
End Get
Set(ByVal value As Object)
Try
' This will throw an exception of the string is
' null, empty, or not in the format of a date.
Me.Value = DateTime.Parse(CStr(value))
Catch
' In the case of an exception, just use the default
' value so we're not left with a null value.
Me.Value = DateTime.Now
End Try
End Set
End Property
Public Function GetEditingControlFormattedValue(ByVal context _
As DataGridViewDataErrorContexts) As Object _
Implements IDataGridViewEditingControl.GetEditingControlFormattedValue
Return Me.Value.ToShortDateString()
End Function
Public Sub ApplyCellStyleToEditingControl(ByVal dataGridViewCellStyle As _
DataGridViewCellStyle) _
Implements IDataGridViewEditingControl.ApplyCellStyleToEditingControl
Me.Font = dataGridViewCellStyle.Font
Me.CalendarForeColor = dataGridViewCellStyle.ForeColor
Me.CalendarMonthBackground = dataGridViewCellStyle.BackColor
End Sub
此代码用于添加列:
Dim col As New CalendarColumn() With {.HeaderText = "Date time"}
DataGridView1.Columns.Insert(5, col)
如何使时间变长。若要以自定义格式显示日期和时间,应将格式指定给的属性。
DateTimePicker
的CustomFormat
属性对于编辑格式很有用,但是对于在单元格中显示数据,您应该使用column.DefaultCellStyle.format
例如,要显示日期和时间,如2016/09/15 10:31:04 PM
,应使用yyyy/MM/ddh:MM:ss tt
作为格式
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim dt = New DataTable()
dt.Columns.Add("Date", GetType(DateTime))
dt.Rows.Add(DateTime.Now)
dt.Rows.Add(DateTime.Now)
Dim column = New DataGridViewTextBoxColumn()
column.DefaultCellStyle.Format = "yyyy/MM/dd h:mm:ss tt"
column.DataPropertyName = "Date"
Me.DataGridView1.Columns.Add(column)
Me.DataGridView1.DataSource = dt
End Sub
有关自定义日期格式的详细信息,请参见:
DataGridView日期时间选择器列 下面是日期时间选择器列的完整源代码,其中包含一些修复。源代码已从中获取,我只是做了一些小更改和小修复。已进行更改以支持
时间
和长格式。此外,当单元格值为DBNull.value
时,还进行了修复以防止异常:
Imports System
Imports System.Windows.Forms
Public Class CalendarColumn
Inherits DataGridViewColumn
Public Sub New()
MyBase.New(New CalendarCell())
End Sub
Public Overrides Property CellTemplate() As DataGridViewCell
Get
Return MyBase.CellTemplate
End Get
Set(ByVal value As DataGridViewCell)
' Ensure that the cell used for the template is a CalendarCell.
If (value IsNot Nothing) AndAlso _
Not value.GetType().IsAssignableFrom(GetType(CalendarCell)) _
Then
Throw New InvalidCastException("Must be a CalendarCell")
End If
MyBase.CellTemplate = value
End Set
End Property
End Class
Public Class CalendarCell
Inherits DataGridViewTextBoxCell
Public Sub New()
' Use the short date format.
Me.Style.Format = "yyyy/MM/dd h:mm:ss tt"
End Sub
Public Overrides Sub InitializeEditingControl(ByVal rowIndex As Integer, _
ByVal initialFormattedValue As Object, _
ByVal dataGridViewCellStyle As DataGridViewCellStyle)
' Set the value of the editing control to the current cell value.
MyBase.InitializeEditingControl(rowIndex, initialFormattedValue, _
dataGridViewCellStyle)
Dim ctl As CalendarEditingControl = _
CType(DataGridView.EditingControl, CalendarEditingControl)
' Use the default row value when Value property is null.
If (Me.Value Is Nothing OrElse IsDBNull(Me.Value)) Then
ctl.Value = CType(Me.DefaultNewRowValue, DateTime)
Else
ctl.Value = CType(Me.Value, DateTime)
End If
End Sub
Public Overrides ReadOnly Property EditType() As Type
Get
' Return the type of the editing control that CalendarCell uses.
Return GetType(CalendarEditingControl)
End Get
End Property
Public Overrides ReadOnly Property ValueType() As Type
Get
' Return the type of the value that CalendarCell contains.
Return GetType(DateTime)
End Get
End Property
Public Overrides ReadOnly Property DefaultNewRowValue() As Object
Get
' Use the current date and time as the default value.
Return DateTime.Now
End Get
End Property
End Class
Class CalendarEditingControl
Inherits DateTimePicker
Implements IDataGridViewEditingControl
Private dataGridViewControl As DataGridView
Private valueIsChanged As Boolean = False
Private rowIndexNum As Integer
Public Sub New()
Me.Format = DateTimePickerFormat.Custom
Me.CustomFormat = "yyyy/MM/dd h:mm:ss tt"
End Sub
Public Property EditingControlFormattedValue() As Object _
Implements IDataGridViewEditingControl.EditingControlFormattedValue
Get
Return Me.Value.ToString("yyyy/MM/dd h:mm:ss tt")
End Get
Set(ByVal value As Object)
Try
' This will throw an exception of the string is
' null, empty, or not in the format of a date.
Me.Value = DateTime.Parse(CStr(value))
Catch
' In the case of an exception, just use the default
' value so we're not left with a null value.
Me.Value = DateTime.Now
End Try
End Set
End Property
Public Function GetEditingControlFormattedValue(ByVal context _
As DataGridViewDataErrorContexts) As Object _
Implements IDataGridViewEditingControl.GetEditingControlFormattedValue
Return Me.Value.ToString("yyyy/MM/dd h:mm:ss tt")
End Function
Public Sub ApplyCellStyleToEditingControl(ByVal dataGridViewCellStyle As _
DataGridViewCellStyle) _
Implements IDataGridViewEditingControl.ApplyCellStyleToEditingControl
Me.Font = dataGridViewCellStyle.Font
Me.CalendarForeColor = dataGridViewCellStyle.ForeColor
Me.CalendarMonthBackground = dataGridViewCellStyle.BackColor
End Sub
Public Property EditingControlRowIndex() As Integer _
Implements IDataGridViewEditingControl.EditingControlRowIndex
Get
Return rowIndexNum
End Get
Set(ByVal value As Integer)
rowIndexNum = value
End Set
End Property
Public Function EditingControlWantsInputKey(ByVal key As Keys, _
ByVal dataGridViewWantsInputKey As Boolean) As Boolean _
Implements IDataGridViewEditingControl.EditingControlWantsInputKey
' Let the DateTimePicker handle the keys listed.
Select Case key And Keys.KeyCode
Case Keys.Left, Keys.Up, Keys.Down, Keys.Right, _
Keys.Home, Keys.End, Keys.PageDown, Keys.PageUp
Return True
Case Else
Return Not dataGridViewWantsInputKey
End Select
End Function
Public Sub PrepareEditingControlForEdit(ByVal selectAll As Boolean) _
Implements IDataGridViewEditingControl.PrepareEditingControlForEdit
' No preparation needs to be done.
End Sub
Public ReadOnly Property RepositionEditingControlOnValueChange() _
As Boolean Implements _
IDataGridViewEditingControl.RepositionEditingControlOnValueChange
Get
Return False
End Get
End Property
Public Property EditingControlDataGridView() As DataGridView _
Implements IDataGridViewEditingControl.EditingControlDataGridView
Get
Return dataGridViewControl
End Get
Set(ByVal value As DataGridView)
dataGridViewControl = value
End Set
End Property
Public Property EditingControlValueChanged() As Boolean _
Implements IDataGridViewEditingControl.EditingControlValueChanged
Get
Return valueIsChanged
End Get
Set(ByVal value As Boolean)
valueIsChanged = value
End Set
End Property
Public ReadOnly Property EditingControlCursor() As Cursor _
Implements IDataGridViewEditingControl.EditingPanelCursor
Get
Return MyBase.Cursor
End Get
End Property
Protected Overrides Sub OnValueChanged(ByVal eventargs As EventArgs)
' Notify the DataGridView that the contents of the cell have changed.
valueIsChanged = True
Me.EditingControlDataGridView.NotifyCurrentCellDirty(True)
MyBase.OnValueChanged(eventargs)
End Sub
End Class
下面是测试代码:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim dt = New DataTable()
dt.Columns.Add("Date", GetType(DateTime))
dt.Rows.Add(DateTime.Now)
dt.Rows.Add(DateTime.Now)
Dim column = New CalendarColumn()
column.DataPropertyName = "Date"
Me.DataGridView1.Columns.Add(column)
Me.DataGridView1.DataSource = dt
End Sub
@RezaAghaei我在哪里可以编辑我的代码,我已经尝试过了,但是没有任何改变,datetimepicker本身有什么改变,不是值,所以你能给我看一下吗?@RezaAghaei这是所有的代码,这是msn站点的代码,你可以在帖子的链接中查看源代码。感谢you@RezaAghaei有一个小问题,当我编辑日期时,显示的时间是12:00:00 AM,当我编辑日期时,如何显示当前时间您正在使用
DateTimePicker
进行编辑?您是否在日期时间选择器中显示了时间部分?有一个小问题,当我编辑日期时,显示的时间是12:00:00 AM,如何在编辑日期时显示当前时间。