Using Dataset in user control

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VB

ASP.NET

Hi,

I am trying to develop a user control which has datagrid in it.

Following is code snipped from user control

 Private Dsm As DataSet
    
  Public Property ds() As DataSet
        Get
            Return DsM
        End Get

        Set(value As DataSet)
            DsM = value
        End Set
    End Property
Public Sub Populategrid()
        grd.DataSource = Nothing
        grd.DataSource = ds
        grd.DataBind()
End Sub

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

    End Sub

In the .aspx

<asp:UpdatePanel ID="UpdatePanel1" runat="server"  UpdateMode ="Conditional">
          <ContentTemplate>

             <uc1:grtcnt ID="grtcnt1"  runat="server"   />
             <asp:Button ID="btnRefresh" runat="server" Text="Refresh" onclick="btnRefresh_Click" />
         </ContentTemplate>
     </asp:UpdatePanel>

in the .aspx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            grtcnt1.ds=datSet
        End If
    End Sub

Protected Sub btnRefresh_Click(sender As Object, e As EventArgs) Handles btnRefresh1.Click
        btnClicked = 1
        Label1.Text = DateTime.Now.ToLongTimeString()
grtcnt1.ds=NewdatSet
grtcnt1.Populategrid()
            End Sub

My problem is,

While loading page for the first time, data are populated based on the dataset (datset). But on my refresh button click event,even though new/updated data is available in (NewdatSet) it is not getting reflected in my usercontrol grid
even though I make an explicit call to method that bind the data(Populategrid).
Regards
Sudarsan C.R