Question

因此，我正在建立一个网站并实施注册功能，我登录工作但我在注册时遇到了麻烦。

基本上它没有写任何id db，我尝试了多项但没有任何作用，我没有得到任何错误或例外它只是没有在db中写任何东西，激活邮件部分工作正常，我收到邮件，但没有任何内容写在UsersInfo数据库和UsersActivations数据库。

public partial class RegistrationPage : System.Web.UI.Page
{
    protected void ActivationMail(int userId)
    {
        string constr = ConfigurationManager.ConnectionStrings["UsersConnectionString"].ConnectionString;
        string activationCode = Guid.NewGuid().ToString();
        using (SqlConnection sqlConn = new SqlConnection(constr))
        {
            using (SqlCommand sqlCom = new SqlCommand("INSERT INTO UserActivations VALUES(@UserId, @ActivationCode)"))
            {
                using (SqlDataAdapter sqlAdpt = new SqlDataAdapter())
                {
                    sqlCom.Parameters.AddWithValue("@UserId", userId);
                    sqlCom.Parameters.AddWithValue("@ActivationCode", activationCode);
                    sqlCom.Connection = sqlConn;
                    sqlConn.Open();
                    sqlConn.Close();
                }
            }
        }

        using (MailMessage mm = new MailMessage("sender@gmail.com", txt_mail.Text))
        {
            mm.Subject = "Activation Mail";
            string body = "Hello " + txt_username.Text.Trim() + ",";
            body += "<br /><br />Please click the following link to activate your account";
            body += "<br /><a href = '" + Request.Url.AbsoluteUri.Replace("CS.aspx", "Activation.aspx?ActivationCode=" + activationCode) + "'>Click here to activate your account.</a>";
            body += "<br /><br />Thanks";
            mm.Body = body;
            mm.IsBodyHtml = true;
            SmtpClient smtp = new SmtpClient();
            smtp.Host = "smtp.gmail.com";
            smtp.EnableSsl = true;
            NetworkCredential NetworkCred = new NetworkCredential("lukagamermaker@gmail.com", "1,2,3,4,5,6");
            smtp.UseDefaultCredentials = true;
            smtp.Credentials = NetworkCred;
            smtp.Port = 587;
            smtp.Send(mm);
            ClientScript.RegisterStartupScript(GetType(), "alert", "alert('Activatio mail sent , please check you e-mail.');", true);
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if(IsPostBack)
        {
            SqlConnection sqlCon = new SqlConnection(ConfigurationManager.ConnectionStrings["UsersConnectionString"].ConnectionString);
            sqlCon.Open();

            string checkuser = "select count(*) from UsersInfo where UserName='" + txt_username.Text + "'";
            SqlCommand sqlCom = new SqlCommand(checkuser,sqlCon);

            int temp = Convert.ToInt32(sqlCom.ExecuteScalar().ToString());
            if (temp == 1)
            {
                Response.Write("There is already user using that User Name");
            }

            sqlCon.Close();
        }
    }

    protected void btn_register_Click(object sender, EventArgs e)
    {
        int userid = 0;

        if ((txt_username.Text != "") && (txt_password.Text != "") && (txt_mail.Text != ""))
        {
            SqlConnection sqlCon = new SqlConnection(ConfigurationManager.ConnectionStrings["UsersConnectionString"].ConnectionString);
            sqlCon.Open();
            string insertQuery = "insert into UsersInfo (UserName,Password,Mail) values (@Uname , @Pass , @Email)";
            SqlCommand sqlCom = new SqlCommand(insertQuery, sqlCon);

            sqlCom.Parameters.AddWithValue("@Uname", txt_username.Text);
            sqlCom.Parameters.AddWithValue("@Pass", txt_password.Text);
            sqlCom.Parameters.AddWithValue("@Email", txt_mail.Text);

            ActivationMail(userid);

            Response.Redirect("Login.aspx");

            sqlCon.Close();
        }
        else
        {
            Response.Write("Error in making account");
        }
    }
}

Answer 1

您没有执行插入查询。使用ExecuteNonQuery()

执行查询

SqlCommand.ExecuteNonQuery方法：对连接执行Transact-SQL语句并返回受影响的行数。

更新您的代码以执行您的查询

using (SqlCommand sqlCom = new SqlCommand("INSERT INTO UserActivations VALUES(@UserId, @ActivationCode)"))
{ 
   sqlCom.Parameters.Add("@UserId",SqlDbType.VarChar,30).Value=userId; 
   sqlCom.Parameters.Add("@ActivationCode",SqlDbType.VarChar,30).Value=activationCode;
   sqlCom.Connection = sqlConn;
   sqlConn.Open();

   //here it is
   sqlCom.ExecuteNonQuery();
   sqlConn.Close();               
}

使用Parameters.AddWithValue是个坏主意。在这种情况下，ADO.NET必须猜测数据类型，并且在使用字符串和AddWithValue时存在特殊危险。有关详细信息，

读 Under the Table - How Data Access Code Affects Database Performance Can we stop using AddWithValue() already?（摘自@mason的评论）

代码不在数据库asp.net中写入值

1 个答案: