Inser child item on ItemDataBound event.

[Valdas]

Hi,
I would like to Insert child item on ItemDataBound event.
My code:

If TypeOf e.Item Is TreeListDataItem Then

            Dim dataItem = DirectCast(e.Item, TreeListDataItem)

            If dataItem.HierarchyIndex.NestedLevel <> 0 Then

                dataItem("InsertCommandColumn").Controls(0).Visible = False

            End If

            dataItem("FileName").Text = ""

            dataItem("VisitName").Text = ""

            'dataItem.InsertChildItem()

        End If

<Columns>
                            <telerik:TreeListEditCommandColumn UniqueName="InsertCommandColumn" ButtonType="ImageButton"
                                HeaderStyle-Width="60px" ItemStyle-HorizontalAlign="Center" InsertText="Create Subject" />
                            <telerik:TreeListTemplateColumn AllowSorting="false" ItemStyle-Width="140px" HeaderStyle-Width="140px">
                                <ItemTemplate>
                                    <telerik:RadButton ID="btnCancel" Text="Upload" runat="server" CausesValidation="False"
                                        CommandName="UploadFiles" CommandArgument='<%# Bind("Patient_Id") %>'>
                                        <Icon PrimaryIconUrl="~/Images/upload16X16.png" PrimaryIconLeft="5px" />
                                    </telerik:RadButton>
                                </ItemTemplate>
                            </telerik:TreeListTemplateColumn>
                            <telerik:TreeListBoundColumn DataField="ClientPatient_Id" HeaderText="Subject ID"
                                ReadOnly="true" UniqueName="ClientPatientId" HeaderStyle-Width="60px" ForceExtractValue="Always" />
                            <telerik:TreeListBoundColumn DataField="FileName" HeaderText="File Name" UniqueName="FileName"
                                HeaderStyle-Width="300px" />
                            <telerik:TreeListBoundColumn DataField="Visit_Name" HeaderText="Visit" UniqueName="VisitName"
                                HeaderStyle-Width="60px" />
                            <telerik:TreeListBoundColumn DataField="CreationDate" HeaderText="Date Created" UniqueName="CreationDate"
                                HeaderStyle-Width="60px" DataFormatString="{0:d}" />
                        </Columns>

Thank you for the help.

[Tsvetina]

Hi Valdas,

ItemDataBound is not a good place to fire commands from, plus with the current code that you posted, you may get an Out of memory exception as you call this method for all items on each binding and the insert operation leads to a rebind itself.
Can you please elaborate on what is your general goal and we will give you some suggestions that use the recommended practices for working with RadTreeList?

All the best,
Tsvetina
the Telerik team

[Valdas]

Hi,
I was trying to build the list and add child elements on ItemDataBound.
You are right, it's not a good practice. I resolved it by doing it on database level.
I selected the parent element and did union on child selection.

Thank you.