Login Page not getting redirected properly

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C#

ASP.NET

protected void btnSubmit_Click(object sender, EventArgs e)
    {
       SqlDataReader sdrDatanew = null; //Read rows one by one.
        string strnew;
        string connectionString = WebConfigurationManager.ConnectionStrings["Gen_LicConnectionString"].ConnectionString; //Define new connectionstring
        SqlConnection connew = new SqlConnection(connectionString); //establishes a new sql connection
        connew.Open(); //Opens Connection
        strnew = "select User_Type from User_Details where User_Type='" + ddlUserSel.SelectedItem.Value + "' AND LoginID = '" + txtUserName.Text + "' AND Password = '" + txtPassword.Text + "'";
        SqlCommand sqlCommnew = new SqlCommand(strnew, connew); //passes the command and connection
        sdrDatanew = sqlCommnew.ExecuteReader(); //For select command

        int userType = 0;
        
        if (sdrDatanew.HasRows)
        {
            if (sdrDatanew.Read())
            {
                userType = Convert.ToInt32(sdrDatanew["User_Type"].ToString());
           }
        }

switch (userType)
{
    case 0:
        Response.Redirect("Lic_Gen.aspx");
        break;
    case 1:
        Response.Redirect("Cust_Page.aspx");
        break;
    default:
        lblDisp.Text= "Invalid User/Password";
        break;
}

connew.Close();
    }

I'm having issues in redirecting my page. Irrespective of wrong password or user id, or even choosing customer or anything, for everything, the page gets redirected to the "Lic_gen.aspx" page. I know i've explicitly defined "usertype" as 0, but I'm not really getting how to resolve this error.

Can someone help me please.