private void CheckSendFile(TextBox a, TextBox b)
{
if (String.IsNullOrEmpty(a.Text) || String.IsNullOrEmpty(b.Text))
{
MessageBox.Show("Invalid values entered. Check the input, please");
}
else if (userLogic.GetLoginForSend(b.Text) == 0)
{
MessageBox.Show("Wrong user login");
}
else if (fileLogic.GetTitleForDelete(id, a.Text) == 0)
{
MessageBox.Show("No such file exists. Check the input, please");
}
else
{
fileLogic.SendFile("SendFile", TitleBox.Text, UserBox.Text, id);
}
}