how send textbox value listview with button to another page

Question

hi everyone ,i want to sent value of textbox in listview use button to another page,i use this code but program take an error that:

Object reference not set to an instance of an object.

 

 

protected void addtobasket_Click(object sender, System.EventArgs e)

{

string count2 = (((sender as Button).Parent as ListViewItem).FindControl("txtcount") as TextBox).Text; 

} 

 

<ItemTemplate>

<asp:TextBox ID="txtcount" type="text" runat="server" Width="30"></asp:TextBox>

<asp:Button ID="addtobasket" runat="server" Text="Add to basket" OnClick="addtobasket_Click">

</asp:Button>

</ItemTemplate>