/*用户撰写邮件User to Doctor*/
public string MessageCompose(string userID, string password, string receiverID, string text) {
UserService userService = new UserService();
UserInfo userInfo = userService.Login(userID, password);
if (userInfo.ErrorMessage == null) {
return userService.MessageCompose(receiverID, text);
}
else {
return userInfo.ErrorMessage;
}
}