using System;
using System.ComponentModel;
using System.Data.SqlClient;
using System.Data;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            //первый вызов
            preload();
            //второй вызов
            preload();
        }

        private void preload()
        {
            SqlDataAdapter da = new SqlDataAdapter(@"execute as user=user; select user", "Server=10.1.7.10;Database=Photo_report_temp;Trusted_Connection=True;");
            DataTable dt = new DataTable();
            da.Fill(dt);
        }
    }
}