0
나는 button-click 이벤트 후에 동적으로 구성된 gridview 컨트롤을 가지고있다. 일부 열은 동적으로 추가 된 확인란을 포함합니다. 어떤 이유로,이 Gridview의 모든 체크 상자에 대해 OnCheckedChanged 이벤트를 발생시킬 수 없습니다. 나는 내 자신에 대한 답을 발견했습니다 생각CheckChanged 이벤트가 동적 체크 박스로 실행되지 않습니까?
Imports System.Data
Imports System.Configuration
Imports System.Collections
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls
Imports System.Collections.Specialized
Imports System.Data.SqlClient
Public Class DynamicallyTemplatedGridViewHandler
Implements ITemplate
Private ItemType As ListItemType
Private FieldName As String
Private InfoType As String
Public Sub New(item_type As ListItemType, field_name As String, info_type As String)
ItemType = item_type
FieldName = field_name
InfoType = info_type
End Sub
Public Sub InstantiateIn(Container As System.Web.UI.Control) Implements ITemplate.InstantiateIn
Select Case ItemType
Case ListItemType.Header
Dim header_ltrl As New Literal()
header_ltrl.Text = "<b>" & FieldName & "</b>"
Container.Controls.Add(header_ltrl)
Exit Select
Case ListItemType.Item
Select Case InfoType
Case "CheckBox"
' for other 'non-command' i.e. the key and non key fields, bind textboxes with corresponding field values
Dim field_chkbox As New CheckBox()
field_chkbox.ID = FieldName
field_chkbox.Text = [String].Empty
' if Inert is intended no need to bind it with text..keep them empty
AddHandler field_chkbox.DataBinding, New EventHandler(AddressOf OnDataBinding)
AddHandler field_chkbox.CheckedChanged, New EventHandler(AddressOf OnCheckedChanged)
field_chkbox.CausesValidation = False
Container.Controls.Add(field_chkbox)
Case Else
Dim field_lbl As New Label()
field_lbl.ID = FieldName
field_lbl.Text = [String].Empty
'we will bind it later through 'OnDataBinding' event
AddHandler field_lbl.DataBinding, New EventHandler(AddressOf OnDataBinding)
Container.Controls.Add(field_lbl)
Exit Select
End Select
Exit Select
Case ListItemType.EditItem
If InfoType = "CheckBox" Then
' for other 'non-command' i.e. the key and non key fields, bind textboxes with corresponding field values
Dim field_chkbox As New CheckBox()
field_chkbox.ID = FieldName
field_chkbox.Text = [String].Empty
AddHandler field_chkbox.DataBinding, New EventHandler(AddressOf OnDataBinding)
AddHandler field_chkbox.CheckedChanged, New EventHandler(AddressOf OnCheckedChanged)
field_chkbox.CausesValidation = False
Container.Controls.Add(field_chkbox)
Else
' for other 'non-command' i.e. the key and non key fields, bind textboxes with corresponding field values
Dim field_txtbox As New TextBox()
field_txtbox.ID = FieldName
field_txtbox.Text = [String].Empty
AddHandler field_txtbox.DataBinding, New EventHandler(AddressOf OnDataBinding)
Container.Controls.Add(field_txtbox)
End If
Exit Select
End Select
End Sub
Private Sub OnDataBinding(sender As Object, e As EventArgs)
Dim bound_value_obj As Object = Nothing
Dim ctrl As Control = DirectCast(sender, Control)
Dim data_item_container As IDataItemContainer = DirectCast(ctrl.NamingContainer, IDataItemContainer)
bound_value_obj = DataBinder.Eval(data_item_container.DataItem, FieldName)
Select Case ItemType
Case ListItemType.Item
Dim field_ltrl As CheckBox = DirectCast(sender, CheckBox)
field_ltrl.Checked = CBool(bound_value_obj.ToString())
AddHandler field_ltrl.CheckedChanged, New EventHandler(AddressOf OnCheckedChanged)
field_ltrl.CausesValidation = False
Exit Select
Case ListItemType.EditItem
Dim field_txtbox As CheckBox = DirectCast(sender, CheckBox)
field_txtbox.Checked = CBool(bound_value_obj.ToString())
AddHandler field_txtbox.CheckedChanged, New EventHandler(AddressOf OnCheckedChanged)
field_txtbox.CausesValidation = False
Exit Select
End Select
End Sub
:
팀 S에 의해 제안, 나는 동적 GridView 컨트롤을 수용하는 페이지에 다음을 추가 모든 포스트 백에서 늦게'Page_load'에 모든 동적으로 생성 된 컨트롤을 다시 생성합니다. –
컨트롤을 동적으로 작성하기 위해 Page_Load 이벤트에 IfPostBack 문을 배치했지만 OnCheckedChanged 이벤트가 여전히 발생하지 않습니다. – candyA