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Old September 7th, 2008, 04:29 PM
cyberstore05
Guest
 
Posts: n/a
Default Problem with CrossPage Postback to Display Data fr

I have a master/Detail page website, where users can select a category of items from a menu. The selected items (from interrogating a SQL database) are displayed in a GridView (on what I called ResultsPage). Using a Repeater control, I also display the brand names (from the selected items), as well as the total number of items for each brand. LinkButton is used to display the brands in a bulleted format. This works fine.

Next, I want to enable users to click on the LinkButton which will cause a postback and be directed to another page (which I called a SubsetPage), where the selected brands are displayed in another GridView.

The problem is that although a selection of brands is displayed, the total number of brands is incorrect. I guess what happens is the data is lost during postback, or the ViewState is incorrect. I have tried different things without success.

Code from the ResultsPage:

<asp:Repeater runat="server" EnableViewState="true" id="Repeater1" > <ItemTemplate>
<br />
<asp:Label Text='*' Font-Size="7pt" ForeColor="DarkGray" runat="server"/>
<asp:LinkButton ID="LinkButton1" runat="server" Text='<%# Eval("Brand") %>'
    PostBackUrl ='<%#"SubsetPage.aspx?BrandSearch=" & Eval("Brand") %>'>
    </asp:LinkButton>
     <asp:Label Text='(' Font-Size="8pt" ForeColor="DarkGray" runat="server"/>
                <asp:Label Text='<%# Databinder.Eval(Container.DataItem, "BrandCount") %>' Font-Size="8pt" ForeColor="Black" runat="server"/>
                <asp:Label Text=')' Font-Size="8pt" ForeColor="DarkGray" runat="server"/>
                <br />
</ItemTemplate>
</asp:Repeater>

VB Code from the SubsetPage:

Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not Page.IsPostBack Then
    Dim ConnectionString As String = "Data Source=CYBERSTORE\SQLEXPRESS;Initial Catalog=ProductsDB;Integrated Security=True"
    Using SqlCon1 As New SqlConnection(ConnectionString)
        If SqlCon1.State <> ConnectionState.Open Then
            SqlCon1.Open()
        End If

        Dim BrandSearch As String = Request.QueryString("BrandSearch")
         Using SqlCom1 As New SqlCommand("ProdProcMSearch", SqlCon1)
             SqlCom1.CommandType = CommandType.StoredProcedure
SqlCom1.Parameters.Add("@Brand", Data.SqlDbType.varchar, 50)

            GrdMenuSub.DataSource = SqlCom1.ExecuteReader()
            GrdMenuSub.DataBind()
            SqlCon1.Close()
        End Using
    End Using
    End If
End Sub

I will appreciate any suggestion, along with some example code if possible. Please let me know if you require additional information.






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