Project/project/Profile.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace project
{
    public partial class Profile : Form
    {
        public static string login;
        DataBase dataBase = new DataBase();
        public Profile()
        {
            InitializeComponent();
        }

        private void Profile_Load(object sender, EventArgs e)
        {
            string proverkaLogin = Login.login;
            dataBase.openConnection();

            SqlCommand sqlCommand2 = new SqlCommand($"SELECT name From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string namePolzovatel = sqlCommand2.ExecuteScalar().ToString();
            if (namePolzovatel == "")
                label1.Text = label1.Text + " Отсутствует";
            else
                label1.Text = label1.Text + " " + namePolzovatel;
            Login.name = namePolzovatel;
            sqlCommand2 = new SqlCommand($"SELECT surname From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string surnamePolzovatel = sqlCommand2.ExecuteScalar().ToString();
            if (surnamePolzovatel == "")
                label2.Text = label2.Text + " Отсутствует";
            else
                label2.Text = label2.Text + " " + surnamePolzovatel;
            Login.surname = surnamePolzovatel;
            sqlCommand2 = new SqlCommand($"SELECT number From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string numberPolzovatel = sqlCommand2.ExecuteScalar().ToString();
            if (numberPolzovatel == "")
                label3.Text = label3.Text + " Отсутствует";
            else
                label3.Text = label3.Text + " " + numberPolzovatel;
            Login.number = numberPolzovatel;
            sqlCommand2 = new SqlCommand($"SELECT pol From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string polPolzovatel = sqlCommand2.ExecuteScalar().ToString();
            if (polPolzovatel == "")
                label4.Text = label4.Text + " Не указан";
            else
                label4.Text = label4.Text + " " + polPolzovatel;
            sqlCommand2 = new SqlCommand($"SELECT id From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string idPolzovatel = sqlCommand2.ExecuteScalar().ToString();
            label5.Text = label5.Text + " " + idPolzovatel;
            // Проверка на администратора, если да включается видимость текста
            sqlCommand2 = new SqlCommand($"SELECT administrator From Employee WHERE login = '{proverkaLogin}'", dataBase.GetConnection());
            string admPolzovatel = sqlCommand2.ExecuteScalar().ToString();
            if (admPolzovatel.Trim() == "true")
                label6.Visible = true;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            RedactorProfile redactorProfile = new RedactorProfile();
            this.Hide();
            redactorProfile.Show();
        }
    }
}