Hi,

I am trying to dynamically load a user control into a new row of an ASP.net table on the click event of a button. This works the first time I click the button but subsequent clicks of the button fail to add new rows.

I realise I need to re-add the rows that previously existed in the table, and from what I have read the best place to do this is the Page_Init because then the usercontrol should utilise its viewstate to pre-populate itself, but since the rows are added dynamically they don't exist within the Page_Init method when the button is clicked for a second time.

Does anyone know the best way to do this??

My code is this:

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
        LoadFilters()
    End Sub

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here

    End Sub

    Private Sub btnAddFilter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddFilter.Click
        AddFilter()
    End Sub

    Private Sub LoadFilters()
        Dim row As TableRow
        Dim i As Int32
        Dim hidFilter As HtmlInputHidden

        hidFilter = FindControl("hidFilterCount")

        For i = 1 To Convert.ToInt32(hidFilter.Value)
            AddFilter()
        Next
    End Sub

    Private Sub AddFilter()
        Dim trSearchFilter As New TableRow
        Dim tdSearchFilter As New TableCell
        Dim ucSearchFilter As New AdminSearchFilter

        ucSearchFilter = LoadControl("~\UserControls\AdminSearchFilter.ascx ")
        tdSearchFilter.Controls.Add(ucSearchFilter)

        trSearchFilter.Cells.Add(tdSearchFilter)
        tblSearchFilters.Rows.Add(trSearchFilter)

        hidFilterCount.Value = Convert.ToInt32(hidFilterCount.Value) + 1

        trSearchFilter.Dispose()
        tdSearchFilter.Dispose()
    End Sub

Regards,

Matt

I think maybe your hidfilter variable may be getting reset.

I am pretty certain you're right. Basically the problem is keeping track of how many rows have been added to the table. The viewstate doesn't seem to maintain this.

Does anyone know how to do this?