檢索僅與當前登錄用戶有關的記錄

Question

這是我的按鈕“登錄單擊”中的代碼。 我想知道如何從正在進行登錄表單的任何Web表單的當前登錄用戶中檢索數據庫中的記錄，或者將哪些命令插入select語句中以選擇用戶名當前登錄的n用戶。

protected void btnLogin_Click(object sender, EventArgs e)
{
    var CS = ConfigurationManager.ConnectionStrings["TupperwareDemAppConnString1"].ConnectionString;

    using (SqlConnection con = new SqlConnection(CS))
    {
        var cmd = new SqlCommand(@"SELECT * FROM [USER] WHERE userName= @txtUserName AND userPassword= @txtuserPassword  ", con);
        cmd.Parameters.Add(new SqlParameter("@txtUserName", txtUsername.Text));
        cmd.Parameters.Add(new SqlParameter("@txtuserPassword", txtPassword.Text));
        con.Open();
        var sda = new SqlDataAdapter(cmd);
        var dt = new DataTable();
        sda.Fill(dt);

        if (dt.Rows.Count != 0)
        {
            if (CheckBox1.Checked)
            {
                Response.Cookies["UName"].Value = txtUsername.Text;
                Response.Cookies["Pword"].Value = txtPassword.Text;

                Response.Cookies["UName"].Expires = DateTime.Now.AddDays(15);
                Response.Cookies["PWord"].Expires = DateTime.Now.AddDays(15);
            }
            else
            {
                Response.Cookies["UName"].Expires = DateTime.Now.AddDays(-1);
                Response.Cookies["PWord"].Expires = DateTime.Now.AddDays(-1);

            }
        }
    }
}

Answer 1

將用戶ID存儲在任何會話變量（loggedInUserId）中，並將其傳遞到where條件。 您可以將數據放入數據表中。

public void BindData()
{
        SqlDataAdapter sda = new SqlDataAdapter("SELECT * FROM [USER] WHERE userId='+ loggedInUserId +'", con);
        DataTable dt = new DataTable();
        sda.Fill(dt);
}