Bind Listview Inside Listview for sub menus(child menus) - asp.net

Question

I am little confused for creating website menu & sub menus which is completely dynamic & made from database. For Menus I used Listview Control which is fine now all menus have submenus(child menu) as well which is based on menus. Now I don't understand how to do it. I guess using nested ListView would be good for this but I need an hint how to bind nested listview?
This is my main Listview
<asp:ListView ID="mainMenu" runat="server">
<ItemTemplate>
<li><asp:HyperLink ID="mainLinks" runat="server" NavigateUrl='<%# Eval("name", "~/{0}") %>' Text='<%# Eval("name") %>'></asp:HyperLink>
<ul class="super-child">
<asp:ListView ID="childMenu" runat="server">
<ItemTemplate>
<li><asp:HyperLink ID="cat3" runat="server" NavigateUrl='<%# Eval("category") & Eval("name", "/{0}") %>' Text='<%# Eval("name") %>'></asp:HyperLink></li>
</ItemTemplate>
</asp:ListView>
</ul>
</li>
</ItemTemplate>
</asp:ListView>
Private Sub bigMenu()
Dim constr As String = ConfigurationManager.ConnectionStrings("conio").ConnectionString
Using con As New MySqlConnection(constr)
Using cmd As New MySqlCommand()
cmd.CommandText = "SELECT * FROM mainMenu WHERE status = 'active' order by CAST(position as SIGNED INTEGER) asc"
cmd.Connection = con
Using sda As New MySqlDataAdapter(cmd)
Dim dt As New DataTable()
sda.Fill(dt)
mainMenu.DataSource = dt
mainMenu.DataBind()
End Using
End Using
End Using
End Sub

Answer 1

You need to use ListView ItemDataBound to bind your nested listview. ItemDatBound will get rows value for you. See the below code I done for you
<asp:ListView ID="mainMenu" runat="server" DataKeyNames="enter column name you want">
<ItemTemplate>
<li><asp:HyperLink ID="mainLinks" runat="server" NavigateUrl='<%# Eval("name", "~/{0}") %>' Text='<%# Eval("name") %>'></asp:HyperLink>
<ul class="super-child">
<asp:ListView ID="childMenu" runat="server">
<ItemTemplate>
<li><asp:HyperLink ID="cat3" runat="server" NavigateUrl='<%# Eval("category") & Eval("name", "/{0}") %>' Text='<%# Eval("name") %>'></asp:HyperLink></li>
</ItemTemplate>
</asp:ListView>
</ul>
</li>
</ItemTemplate>
</asp:ListView>
Protected Sub onItemDataBound(sender As Object, e As ListViewItemEventArgs)
If e.Item.ItemType = ListViewItemType.DataItem Then
Dim itm As ListViewDataItem = CType(e.Item, ListViewDataItem)
Dim name As String = mainMenu.DataKeys(itm.DataItemIndex)("enter your datakeyname")
Dim childMenu As ListView = TryCast(e.Item.FindControl("childMenu"), ListView)
Dim constr As String = ConfigurationManager.ConnectionStrings("conio").ConnectionString
Using con As New MySqlConnection(constr)
Using cmd As New MySqlCommand()
cmd.CommandText = "SELECT * FROM tablename WHERE column = '" + name + "'"
cmd.Connection = con
Using sda As New MySqlDataAdapter(cmd)
Dim dt As New DataTable()
sda.Fill(dt)
childMenu.DataSource = dt
childMenu.DataBind()
End Using
End Using
End Using
End If
End Sub