use the following format:
<asp:textbox id="txtlistnum" runat="server" backcolor="Aqua" text="<% #Eval("ListNumber")%>" xmlns:asp="#unknown" />
You can check this link here Asp.net ListView - DataBinding
] on how to bind data to listview
Not to mention you need to use some datasource which is populated with the data you want to show i.e., datatable, List of objects etc and then bind it to the listview.