public static string getConnection()
{
Directory.SetCurrentDirectory(System.Windows.Forms.Application.StartupPath + "\\.. " + "\\.." + "\\.." + "\\..");
string path = Directory.GetCurrentDirectory();
string text = System.IO.File.ReadAllText(@path + "\\encrypt.txt");
string[] info = AESUtils.AESDecrypt(text).Split(new string[] { "\r\n" }, StringSplitOptions.None);
string user = info[0];
string psw = info[1];
string connect_str = String.Format("server=121.5.51.167;database=homework;uid={0};pwd={1}", user, psw);
return(connect_str);
}