how to update data using textbox

protected void ButtonUpdate_Click(object sender, EventArgs e)
        {
            var connectionString = "server=127.0.0.1;uid=root;" + "pwd=xxxxxxxx;database=DBFB;";
            MySql.Data.MySqlClient.MySqlConnection conn = new MySql.Data.MySqlClient.MySqlConnection(connectionString);
            
            using (MySqlConnection con = new MySqlConnection(connectionString)) 
            using (MySqlCommand cmd = new MySqlCommand("update TBL_FB Set FirstName=@FirstName, LastName=@LastName, ContactNumber=@ContactNumber, Email=@Email, Message=@Message where ID= " + Request.QueryString["ID"], con))
            {
                cmd.Parameters.Add("@FirstName", TextBoxFirstName.Text);
                cmd.Parameters.Add("@LastName", TextBoxLastName.Text);
                cmd.Parameters.Add("@ContactNumber", TextBoxContactNumber.Text);
                cmd.Parameters.Add("@Email", TextBoxEmail.Text);
                cmd.Parameters.Add("@Message", TextBoxMessage.Text);
                
                con.Open();
                cmd.ExecuteNonQuery();
            }
            Response.Redirect("Details.aspx?ID=" + TextBoxID.Text);
        }