private void button1_Click(object sender, EventArgs e)
{
    FarPoint.Web.Spread.Model.GroupDataModel gm = new FarPoint.Web.Spread.Model.GroupDataModel(FpSpread1.ActiveSheetView.DataModel);
    FarPoint.Web.Spread.SortInfo[] sort = new FarPoint.Web.Spread.SortInfo[1];
    sort[0] = new FarPoint.Web.Spread.SortInfo(0, true);
    gm.Group(sort, System.Collections.Comparer.Default);
    FpSpread1.ActiveSheetView.DataModel = gm;
    String msg = gm.TargetModel.RowCount.ToString();
    Response.Write("alert('" + msg + "')");
}
	 
	
		Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim gm As New FarPoint.Web.Spread.Model.GroupDataModel(FpSpread1.ActiveSheetView.DataModel)
    Dim sort(0) As FarPoint.Web.Spread.SortInfo
    sort(0) = New FarPoint.Web.Spread.SortInfo(0, True)
    gm.Group(sort, System.Collections.Comparer.Default)
    FpSpread1.ActiveSheetView.DataModel = gm
    String msg = gm.TargetModel.RowCount.ToString()
    Response.Write("alert('" & msg & "')")
End Sub