Problem adding "OnClick" event dynamically

lambofgoth · Apr 28, 2012

Hi, I have a problem adding an OnClick EventHandler to a LinkButton in a DataGrid. I get the following error message, and am not sure how to deal with it: Compiler Error Message: BC30390: 'System.Web.UI.WebControls.LinkButton.Protecte d Overridable Sub OnClick(e As System.EventArgs)' is Protected, and is not accessible in this context. The LinkButton is in a DataGrid, and I am adding the OnClick EventHandler in the DataGrid's OnItemDataBound subroutine: Sub dg_ItemDataBound(sender As Object, e As DataGridItemEventArgs) If (e.Item.ItemType = ListItemType.EditItem) then Dim lbtToggleItemText as LinkButton = e.Item.FindControl("lbtToggleItemText") AddHandler lbtToggleItemText.OnClick, AddressOf ToggleViewItemTextDisplay end if End sub and the subroutine called looks like this: sub ToggleViewItemTextDisplay(sender as object, e as EventArgs) Response.Write("just to show the onclick event has happened") end sub The full code is below (the LinkButton is actually in EditItemTemplate.ascx, which is dynamically loaded into an EditItemTemplate column at runtime). Thanks for any help, JON ++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++ THE CODE - THE CODE - THE CODE - THE CODE - THE CODE - THE CODE - THE CODE - THE CODE ++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++ ************************************** EditItemTemplate.ascx ************************************** <%@ Control Language="VB" %> <asp:LinkButton id="lbtToggleItemText" runat="server" Text="Toggle ItemText Display" /> ************************************** DataGridPage.aspx ************************************** <%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="System.Data" %> <%@ Import Namespace="System.Data.Oledb" %> <script language="VB" runat="server"> Dim objConn as New OleDbConnection ( ConfigurationSettings.AppSettings("ConnectionString") ) Dim ds as Dataset = New DataSet() Dim objAdapter as New OleDbDataAdapter ( "SELECT * from tblItems", objConn ) Sub Page_Load(sender as object, e as eventargs) objConn.Open() objAdapter.Fill(ds, "tblItems") dg.DataSource = ds dg.DataMember = "tblItems" Dim tc1 As New TemplateColumn() tc1.HeaderTemplate = New DataGridTemplate(ListItemType.Header, "Column1") tc1.ItemTemplate = New DataGridTemplate(ListItemType.Item, "Column1") '********************************* '*** ADD ASCX FILE AS TEMPLATE *** '********************************* tc1.EditItemTemplate = Page.LoadTemplate("EditItemTemplate.ascx") tc1.FooterTemplate = New DataGridTemplate(ListItemType.Footer, "Column1") dg.Columns.Add(tc1) If Not Page.IsPostBack Then dg.Databind() End If End Sub sub dg_edit(sender as object, e as DataGridCommandEventArgs) dg.edititemindex = e.item.itemindex dg.databind() end sub sub dg_cancel(sender as object, e as DataGridCommandEventArgs) dg.edititemindex = -1 dg.databind() end sub sub dg_update(sender as object, e as DataGridCommandEventArgs) 'Put an update function here end sub Sub dg_ItemDataBound(sender As Object, e As DataGridItemEventArgs) If (e.Item.ItemType = ListItemType.EditItem) then Dim lbtToggleItemText as LinkButton = e.Item.FindControl("lbtToggleItemText") AddHandler lbtToggleItemText.OnClick, AddressOf ToggleViewItemTextDisplay '********************************* 'WHY DOESN'T THIS WORK??????? '********************************* end if End sub sub ToggleViewItemTextDisplay(sender as object, e as EventArgs) Response.Write("just to show the onclick event has happened") end sub Private Class DataGridTemplate Implements ITemplate Dim templateType As ListItemType Dim columnName As String Sub New(ByVal type As ListItemType, ByVal ColName As String) templateType = type columnName = ColName End Sub Sub InstantiateIn(ByVal container As Control) Implements ITemplate.InstantiateIn Dim lc As New Literal() Select Case templateType Case ListItemType.Header lc.Text = "Header" container.Controls.Add(lc) Case ListItemType.Item lc.Text = "Item " & columnName container.Controls.Add(lc) Case ListItemType.EditItem '*** This is taken care of with the LoadTemplate method above Case ListItemType.Footer lc.Text = "Footer" container.Controls.Add(lc) End Select End Sub End Class </script> <html> <head> <link rel="STYLESHEET" type="text/css" href=http://aspmessageboard.com/archive/index.php/"Forum.css"> </head> <body> <h1>Admin Page - Add a New Message</h1> <form runat="server" name="form1" id="form1"> <asp

ataGrid id="dg" runat="server" AutoGenerateColumns="False" OnEditCommand="dg_edit" OnCancelCommand="dg_cancel" OnUpdateCommand="dg_update" OnItemDataBound="dg_ItemDataBound" > <Columns> <asp:editcommandcolumn HeaderText="EDIT" edittext="Edit" CancelText="Cancel" UpdateText="Save" HeaderText="" /> </Columns> </asp:dataGrid> </form> </body></html> I've had an answer already (!) to this question - the event is called Click, not OnClick (OnClick is the protected implementation code.) JON I've had an answer already (!) to this question - the event is called Click, not OnClick (OnClick is the protected implementation code.) JON I've had an answer already (!) to this question - the event is called Click, not OnClick (OnClick is the protected implementation code.) JON

Problem adding "OnClick" event dynamically

lambofgoth

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