检索数据表单数据库并选择特定的行 [英] retrieving data form database and selecting particular row

问题描述

数据库具有用户名，电子邮件，密码
用户在文本框中输入用户名，电子邮件将显示在Listview或文本框中，
因此我无法检索特定行no

Database is having username,email,pasword
user enters username in a textbox and his email is displayed in Listview or textbox,
so i''m nt able retrieve the paricular row no

推荐答案

Try:

Try:

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("SELECT username,email,pasword FROM myTable WHERE username=@UN", con))
        {
        com.Parameters.AddWithValue("@UN", username);
        using (SqlDataReader reader = com.ExecuteReader())
            {
            if (reader.Read())
                {
                ...
                }
            }
        }
    }

BTW:我希望您不是将密码以明文形式存储在数据库中吗?这里有一个提示可以解释这一点:
密码存储:操作方法. [

BTW: I hope you aren''t storing passwords in the DB in clear text? There is a Tip here that explains this:
Password Storage: How to do it.[^]

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