Difference between DataList and GridView - Handling an item delete

---Update Panel on .aspx page----
    <asp:UpdatePanel ID="filePanel" updateMode="Conditional" runat="server">
        <ContentTemplate>
            <div style="width: 450px; height: 300px; overflow-y: auto; overflow-x: hidden; padding: 5px;">
                <asp:DataList ID="FileList" runat="server" DataKeyField="FileName">
                    <ItemTemplate>
                        <div style="float: left; width: 185px;border: dotted 1px #c9c9c9;text-align: center; vertical-align:middle;margin: 2px; padding: 4px 0px 4px 0px;">
                            <asp:ImageButton 
                                ID="PicDelete" 
                                runat="server" CommandName="delete"
                                ImageUrl="img/delete_icon.gif" />
                            <i><%#Eval("LighteningFileType")%><br /></i>
                            <cc1:ConfirmButtonExtender ID="ConfirmButtonExtender2" TargetControlID="PicDelete" ConfirmText="This cannot be undone.  Are you sure?" runat="server" />
                            <a href="javascript: showPopImage('<%# Eval("FileGUID") %>', <%# Eval("LighteningFileTypeID") %>)">
                               <asp:Image 
                                    ID="Image1"
                                    runat="server" 
                                    Width='<%#getImageWidth(Eval("LighteningFileTypeID")) %>' 
                                    ImageUrl='<%# getImageUrl(Eval("LighteningFileTypeID"), Eval("FileExtension").ToString(), Eval("FileGUID").ToString()) %>' 
                                    AlternateText='<%# Eval("FileName") %>'/>
                            </a>
                            <asp:Label ID="filetype" Text='<%# FileNamePresentation(Eval("LighteningFileTypeID"), Eval("FileName"), Eval("FileGUID").ToString()) %>' 
                                runat="server"/>
                        </div>
                    </ItemTemplate>
                </asp:DataList></div>
        </ContentTemplate>
    </asp:UpdatePanel>
 
 
 
 
 
 
----event handler in code-behind .aspx.vb page---------
 
    Protected Sub PictureDelete(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataListCommandEventArgs) Handles FileList.ItemCommand
        If e.CommandName = "delete" Then
            Dim fguid As String = FileList.DataKeys(e.Item.ItemIndex).Value.ToString()
 
            Dim lf As New LightningFixes()
            lf.DeleteLightingFile(fguid)
 
            'this removes the file from the FileStoreWebService database
            Dim fd As New DeleteFileFromWebService(fguid)
            lf.GetALLLightningFiles(_pid)
            filePanel.Update()
            If lf.LightningFiles.Tables(0).Rows.Count <> 0 Then
                hideShowFileSections("show")
            Else
                Response.Redirect("Lightning.aspx?ProjectID=" & _pid)
            End If
        End If
 
    End Sub