delete confirm not working...

[wsyeager36]

I know this question has been asked several different times and ways, but even after checking out the answers to these questions and the aspalliance article on how to perform a delete confirm, I'm still having a problem and I just can't figure it out.......

All I'm trying to do is to set up a delete confirm for a row in my datagrid. The confirm pops up ok, but the delete functionality never takes place. After I respond to delete the row, the page_load event fires again (which I expect), but no other event fires after that......

Here is a snippet from my html:


<asp:TemplateColumn HeaderText="Inactivate Member">

<ItemTemplate>

<asp:Button id="cmdDelete" runat="server" Text="Inactivate" CommandName="Delete" CausesValidation="false"></asp:Button>

</ItemTemplate>

</asp:TemplateColumn>




The following is the delete confirm function in my html:


<script>

function getdelconfirm()

{

if (confirm("Are you sure you want to inactivate this member?")==true)

return true;

else

return false;

}

</script>




The following is the code in my page_load event:


Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load



Try

If Not IsPostBack Then

If Not Request.QueryString.Item("strMsg") Is Nothing Then 'Capture success msg from child screen

Response.Write("<script>alert('" & Request.QueryString.Item("strMsg") & "');</script>")

End If

'Initialize Viewstate variables

lblWelcome.Text = "Welcome " & HttpContext.Current.User.Identity.Name & ". Today is " & FormatDateTime(Now, DateFormat.GeneralDate)

LoadMembers()

End If

DsNCVAC1 = Cache.Get("Category")

dvMembers = DsNCVAC1.Membership.DefaultView

DataGrid1.DataSource = dvMembers

DataGrid1.DataBind()

Catch exException As InvalidCastException 'Used for session timeout

Server.Transfer("..\..\Default.aspx")

Catch exException As ThreadAbortException

'Technically, Server.Transfer or Response.Redirect throws an exception. Catch it here and ignore it.

End Try



End Sub




The following is the code in my itemdatabound event:




Private Sub DataGrid1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles DataGrid1.ItemDataBound



Dim strQueryString As String



If (e.Item.ItemType = ListItemType.Item) Or (e.Item.ItemType = ListItemType.AlternatingItem) Then

Dim hylUserID As HyperLink = CType(e.Item.FindControl("hylUserID"), HyperLink)

Dim txtFirstName As Label = CType(e.Item.FindControl("txtFirstName"), Label)

Dim txtLastName As Label = CType(e.Item.FindControl("txtLastName"), Label)

strQueryString = String.Empty

strQueryString = "?MemberID=" & DataGrid1.DataKeys(e.Item.ItemIndex) & "&FirstName=" & txtFirstName.Text & "&LastName=" & txtLastName.Text & "&AddMember=" & False

hylUserID.NavigateUrl = "MemberAdminEdit.aspx" & strQueryString

End If



End Sub




The following is the code from my itemcreated event:




Private Sub DataGrid1_ItemCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles DataGrid1.ItemCreated



If (e.Item.ItemType = ListItemType.Item) Or (e.Item.ItemType = ListItemType.AlternatingItem) Then

Dim btnButton As Button

btnButton = CType(e.Item.Cells(6).FindControl("cmdDelete"), Button)

btnButton.Attributes.Add("onclick", "return getdelconfirm();")

End If



End Sub




The following is the start of some code from my datagrid1_deletecommand event:




Public Sub DataGrid1_DeleteCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.DeleteCommand

.

.

.




The following is the start of the code from my itemcommand event:


Private Sub DataGrid1_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles DataGrid1.ItemCommand



If e.CommandName = "Delete" Then

.

.

.




I have both the itemcommand and deletecommand events in here, because I was trying out several different methods. The problem is, like I said before, that none of the above events fire after the page_load event is fired when I press ok on the popup confirmation.

What do I need to do in order to have the appropriate event fire after the page_load event fires when I respond ok to the confirm in order to perform the delete functionality?

[pvb]

Not sure how you're hooking up the datagrid events for the ItemCommand, you need either OnItemCommand=YourDataGrid_ItemCommandEventHandler or OnDeleteCommand=YourDataGrid_DeleteCommandEventHandler in your datagrid declaration.

Here's how I'd do the confirm delete:

<%@ Import Namespace="System.Data" %>
<script language="vb" runat="server">
Private Sub bindGrid()
    dgSample.DataSource = createData()
    dgSample.DataBind()
End Sub
Private Function createData() As DataTable
    Dim dt As New DataTable()
    dt.Columns.Add(New DataColumn("ID"))
    dt.Columns.Add(New DataColumn("LastName"))
    dt.Columns.Add(New DataColumn("FirstName"))
    addRow(dt, 1, "Smith", "Bob")
    addRow(dt, 2, "Carter", "Chris")
    Return dt
End Function
 
Private Sub addRow(ByRef target As DataTable, ByVal id As Integer, ByVal lastName As String, ByVal firstName As String)
    Dim dr As DataRow = target.NewRow()
    dr("ID") = id
    dr("LastName") = lastName
    dr("FirstName") = firstName
    target.Rows.Add(dr)
End Sub 
 
Protected Overrides Sub OnLoad(ByVal e As System.EventArgs)
    If Not Page.IsPostBack Then
        bindGrid()
    End If
End Sub 
 
Protected Sub dgSample_ItemCreated(ByVal sender As Object, ByVal e As DataGridItemEventArgs)
    If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim lbtnDelete As LinkButton
        lbtnDelete = CType(e.Item.FindControl("lbtnDelete"), System.Web.UI.WebControls.LinkButton)
        If Not lbtnDelete Is Nothing Then
            lbtnDelete.Attributes.Add("onclick", "return confirmDelete();")
        End If
    End If
End Sub
 
Protected Sub dgSample_ItemCommand(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)
    Dim id As Integer = dgSample.DataKeys(e.Item.ItemIndex)
    Dim itemIndex As Integer = -1
    Select e.CommandName.ToLower()
        Case "edit":
            itemIndex = e.Item.ItemIndex
        Case "save":
            Response.Write(String.Format("Saving: {0}", id))
        Case "delete":
            Response.Write(String.Format("Deleting: {0}", id))      
    End Select
    dgSample.EditItemIndex = itemIndex
    bindGrid()
End Sub
</script>
<html>
    <head>
        <script language="javascript">
        function confirmDelete()
        {
            return window.confirm("Are you sure you want to delete this item?");
        }
        </script>
    </head>
    <body>
        <form runat="server">
            <asp:DataGrid ID="dgSample" Runat="server" AutoGenerateColumns="False" DataKeyField="ID"
                OnItemCreated="dgSample_ItemCreated" OnItemCommand="dgSample_ItemCommand">
                <Columns>
                    <asp:BoundColumn DataField="LastName" HeaderText="Last Name"/>
                    <asp:BoundColumn DataField="FirstName" HeaderText="First Name"/>
                    <asp:TemplateColumn>
                        <ItemTemplate>
                            <asp:LinkButton ID="lbtnEdit" Runat="server" CommandName="Edit" Text="Edit"/>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:LinkButton ID="lbtnSave" Runat="server" CommandName="Save" Text="Save"/>
                        </EditItemTemplate>
                    </asp:TemplateColumn>
                    <asp:TemplateColumn>
                        <ItemTemplate>
                            <asp:LinkButton ID="lbtnDelete" Runat="server" CommandName="Delete" Text="Delete"/>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:LinkButton ID="lbtnCancel" Runat="server" CommandName="Cancel" Text="Cancel"/>
                        </EditItemTemplate>
                    </asp:TemplateColumn>
                </Columns>
            </asp:DataGrid>
        </form>
    </body>
</html>

[wsyeager36]

pvb, I was rebinding the grid on a postback which was not executing the associated handler for the delete button........