TemplateColumn with checkboxes

[Rene]

Hi,

I have tried to use your treelist with a template column for displaying a checkbox.

I get the result that the template column is displayed but now I don't know how to get the check event for the checkboxes.

I use the treelist as member of a usercontrol. There will be multiple instances of this usercontrol on the page.
The content of the treeview will be rebuilt completely on Page_Load of the usercontrol.

Don't know what's going wrong here. Hope you'll have a sample for fixing it.

Sincerely

René

'on Page Load of the UserControl

            RadTreeList1.Style.Add(HtmlTextWriterStyle.Overflow, "auto")


            RadTreeList1.Width = mWidth
            RadTreeList1.Height = mHeight

            RadTreeList1.EditMode = TreeListEditMode.InPlace
            RadTreeList1.Enabled = True

            XmlDataSource1.DataFile = Path & "RowData.xml"
            RadTreeList1.Columns.Clear()

            Dim tmplt As New Web.UI.TemplateBuilder


            Dim selectColumn As New TreeListTemplateColumn
            selectColumn.DataField = "selected"
            selectColumn.EditItemTemplate = New CheckBoxTemplate("")
            selectColumn.ItemTemplate = New CheckBoxTemplate("")

            RadTreeList1.Columns.Add(selectColumn)

            Dim boundColumn As New TreeListBoundColumn
            boundColumn.DataField = "C2"
            boundColumn.UniqueName = "C2"
            boundColumn.HeaderText = "C2"
            RadTreeList1.Columns.Add(boundColumn)


    Private Sub RadTreeList1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.TreeListItemDataBoundEventArgs) Handles RadTreeList1.ItemDataBound
        If TypeOf e.Item Is TreeListDataItem Then
            Dim dataItem As TreeListDataItem = e.Item
            Dim cb As Web.UI.WebControls.CheckBox
            cb = dataItem.FindControl("templateColumnCheckBox")
            AddHandler cb.CheckedChanged, AddressOf CheckBox1_CheckedChanged
            cb.Checked = True
        End If
    End Sub

    Protected Sub CheckBox1_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
        'never get this event....
    End Sub

Public Class CheckBoxTemplate
    Implements System.Web.UI.ITemplate

    Private CheckBox As System.Web.UI.WebControls.CheckBox
    Private colname As String

    Public Sub New(ByVal cName As String)
        colname = cName
    End Sub

    Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) Implements System.Web.UI.ITemplate.InstantiateIn
        CheckBox = New System.Web.UI.WebControls.CheckBox
        CheckBox.ID = "templateColumnCheckBox"
        CheckBox.AutoPostBack = True
        container.Controls.Add(CheckBox)
    End Sub
End Class

[Tsvetina]

Hello Rene,

When you want to create templates dynamically in RadTreeList you should create the entire treelist, along with the templates on the Page_Init event. Otherwise, the columns will not be able to persist their ViewState.

Greetings,
Tsvetina
the Telerik team