C# asp.net 记录客户端的活动

Question

数据库表：注册和购买 （使用 1-10000 范围内的唯一 ID 作为主键和外键连接两个表）

当有相应ID的游客进行在线购买时，如何在我的购买表中添加唯一ID？

我正在使用 Visual Studio 开发 asp.net。但是，如何存储客户端的唯一 ID 以识别他们的日志记录活动？

        string result = "0";
        OleDbConnection connection = new OleDbConnection();
        connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\sim\Desktop\Web.accdb";
        connection.Open();
        OleDbCommand command = new OleDbCommand();
        command.Connection = connection;
        command.CommandText = "select ID from Registration where Name ='" + TextBox1.Text + "' and Password ='" + TextBox2.Text + "'";

        string getValue = command.ExecuteScalar().ToString();
        if (getValue != null)
        {
            result = getValue.ToString();
        }
        Session.Add("UserID", result);

        command.CommandText = "select * from Registration where Name ='" + TextBox1.Text + "' and Password ='" + TextBox2.Text + "'";

        OleDbDataReader reader = command.ExecuteReader();
        int count = 0;

        while (reader.Read())
        {
            count = count + 1;
        }
        if (String.IsNullOrEmpty(TextBox1.Text))
        {
            MessageBox.Show("You have't input the Username.");
        }
        if (String.IsNullOrEmpty(TextBox2.Text))
        {
            MessageBox.Show("you havn't input the Password.");
        }
        if (count == 1)
        {   

            MessageBox.Show("Username and password is valid");
            connection.Close();
            connection.Dispose();
            Response.Redirect("Loginpage.aspx", true);
        }
        else
        {
            MessageBox.Show("Username or Password is not matched");
        }
    }

Answer 1

您可以尝试这样的方法来获取您的注册（客户）ID：

public static string GetClientId()
{
    string result = "0";
    OleDbConnection connection = new OleDbConnection();
    connection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\sim\Desktop\Web.accdb";
    connection.Open();
    OleDbCommand command = new OleDbCommand();
    command.Connection = connection;
    command.CommandText = "select ID from Registration where Name ='" + TextBox1.Text + "' and Password ='" + TextBox2.Text + "'";

    string getValue = command.ExecuteScalar().ToString();
    if (getValue != null)
    {
        result = getValue.ToString();
    }
    conn.Close();
    return result;
}

您可以使用以下方法将该 ID 保存在 Session 中：

Page.Session["UserID"] = GetClientId();

然后，一旦购买，您可以通过检索该值来保存它：

string id = Page.Session["UserID"];

最后，购买时，您需要将其插入数据库中。要了解如何做到这一点，你可以看看这个：C# Inserting Data from a form into an access Database