Save texbox text to SQL Server in ASP.NET website - asp.net

Question

I have a website in ASP.NET and I have a textbox that the user type in text. I want to save this into a SQL Server database that saves all other data from site. I have tried several ways and got to the code below. It throws up the error below
Any help as I'm lost on this now....
Error:
The name 'txtName' does not exist in the current context Step9.aspx.cs 67
Page markup:
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Step9.aspx.cs" Inherits="Step1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div class="question" id="question">
<table border="1" style="border-collapse: collapse">
<tr>
<td style="width: 150px">
Name:<br />
<asp:TextBox ID="txtName" runat="server" Width="140" />
</td>
<td style="width: 100px">
<asp:Button ID="btnAdd" runat="server" Text="Add" OnClick="Insert" />
</td>
</tr>
</table>
</div>
</asp:Content>
C# codebehind:
protected void Insert(object sender, EventArgs e)
{
string name = txtName.Text;
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("INSERT INTO learners (stickTwistBefore) VALUES (#stickTwistBefore)"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Parameters.AddWithValue("#stickTwistBefore", name);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
// this.BindGrid();
}

Answer 1

I noticed that you have specified Step1 class name as Inherits attribute. Ensure that it matches the class name in your Step9.aspx.cs file. I guess Step9 but just confirm.
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Step9.aspx.cs" Inherits="Step1" %>