ต้องการ สร้าง Web Control ไปใส่ใน Datatarow ของ Datatable และส่งไปให้ Gridview แสดงผล

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If GridView1 Is Nothing Then
            GridView1.Visible = False
        Else
            GridView1.Visible = True
        End If

    End Sub

    Function getDatatable() As DataTable

        Dim dt As DataTable = Session("dtSource")
        If dt Is Nothing Then
            dt = New DataTable()
            dt.Columns.Add("test")
            dt.Columns.Add("test2")
            dt.Columns.Add("ลบ")
            Session("dtSource") = dt
        End If
        Return dt

    End Function

    Sub bindDatatable(ByVal dt As DataTable)

        GridView1.DataSource = dt
        GridView1.DataBind()

    End Sub

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim dt As DataTable = getDatatable()
        Dim dr As DataRow = dt.NewRow

        Dim delButton As ImageButton = New ImageButton()
        delButton.ImageUrl = ("~/images/del.png")

        dr("test") = TextBox1.Text
        dr("test2") = TextBox2.Text
        dr("ลบ") = ???????
        dt.Rows.Add(dr)
        bindDatatable(dt)

    End Sub