Question

这是我用于c＃mysql登录系统的代码

    try
    {
        MySqlConnection connection = new MySqlConnection("Server=localhost; database=member; UID=root; Pwd=");
        MySqlCommand cmd = new MySqlCommand("SELECT * FROM member.member WHERE username='" + this.metroTextBox1.Text + "' AND password='" + this.metroTextBox2.Text + "' ;", connection);
        MySqlDataReader myReader;
        connection.Open();
        myReader = cmd.ExecuteReader();
        int count = 0;
        while (myReader.Read())
        {
            count = count + 1;
        }
        if (count == 1)
        {
            Form2 frm = new Form2();
            frm.username = metroTextBox1.Text;
            frm.Show();
            this.Visible = false;
        }
        else
        {
            MetroMessageBox.Show(this, "Incorrect login credentials. Failed to login!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
    }

这是我的数据库 http://i.imgur.com/K831atR.png

基本上我想在expirationdate通过时阻止登录。但我不知道该怎么做。

Answer 1

试试这个：

0x1f

C＃登录系统到期日期

1 个答案: