In the Default.aspx file add the following between <div> and </div> tags

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID"
            DataSourceID="SqlDataSource1">
            <Columns>
                <asp:BoundField DataField="ProductID" HeaderText="ProductID" InsertVisible="False"
                    ReadOnly="True" SortExpression="ProductID" />
                <asp:BoundField DataField="ProductName" HeaderText="ProductName" SortExpression="ProductName" />
                <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" SortExpression="UnitPrice" />
                <asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" SortExpression="QuantityPerUnit" />
                <asp:TemplateField HeaderText="Show Details">
                    <ItemTemplate>
                        <asp:Button ID="btnDetails" runat="server" OnClick="Details_Click" Text="Detail" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
            SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice], [QuantityPerUnit] FROM [Alphabetical list of products]">
        </asp:SqlDataSource>

The Default.aspx.vb file looks as follows...

Partial Class _Default
    Inherits System.Web.UI.Page
    Protected Sub Details_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        '
        Dim gridRow As GridViewRow
        Dim strID, strName As String
        '
        gridRow = CType(sender, Button).Parent.Parent
        strID = gridRow.Cells(0).Text
        strName = gridRow.Cells(1).Text
        Session.Add("ID", strID)
        Session.Add("Name", strName)
        Response.Redirect("Details.aspx", True)
    End Sub
End Class

The Details.aspx.vb file looks as follows...

Partial Class Details
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        '
        If Not Session.Item("ID") Is Nothing Then
            Response.Write("ID = " & Session.Item("ID"))
        End If
        Response.Write("<BR>")
        If Not Session.Item("Name") Is Nothing Then
            Response.Write("Name = " & Session.Item("Name"))
        End If
    End Sub
End Class

Now, run the project with Default.aspx as the start page. When you click on anyof the details button, you will be able to read the row information and pass it on to the other page.