protected void addCredits(object sender, EventArgs e)
        {
            Button b = sender as Button;
            int credits = Int32.Parse(b.CommandArgument.ToString());

            UserBE user = new UserBE();
            user.Nickname = Session["UserNickname"].ToString();
            user = user.getUserByNick();

            user.Credit += credits;
            user.update();
            Session["UserCredit"] = user.Credit;

            user = user.getUserByNick();
            labelCredits.Text = credits.ToString() + " Credits Added! Now you have " + user.Credit.ToString() + " credits!";
        }
        protected void create_Project(object sender, EventArgs e)
        {
            bool correct = true;

            if (creditsTextboxProject.Text.Length == 0 ||
                Int32.Parse(creditsTextboxProject.Text) > Int32.Parse(Session["UserCredit"].ToString()))
            {
                creditsFeedback.Visible = true;
                correct = false;
            }
            else
                creditsFeedback.Text = "";

            if (correct)
            {
                //Project information.
                String tittle = tittleProjectTextbox.Text;
                String description = descriptionTextbox.Text;
                UserBE user1 = new UserBE("", 0, "", "", Session["UserNickname"].ToString(), "");
                UserBE creator = new UserBE(user1.getUserByNick());
                int code = -1;
                DateTime creation = DateTime.Now;
                DateTime expires = DateTime.MinValue;
                int credit = Int32.Parse(creditsTextboxProject.Text);
                DateTime version = DateTime.Now;
                String gitDir = "There";

                //Update the UserBE credits and also the Sessión value.
                String currentCredits = Session["UserCredit"].ToString();
                Session["UserCredit"] = Int32.Parse(currentCredits) - credit;
                creator.Credit = Int32.Parse(currentCredits) - credit;
                creator.update();

                //Project creation.
                ProjectBE crProject = new ProjectBE(tittle, description, creator, code,
                    creation, expires, credit, credit, version, gitDir);
                crProject.create();
                crProject.Code = crProject.getLastCode();

                //When you create a project, you are contributing to it.
                ContributionBE contribution = new ContributionBE(creator, crProject, credit, DateTime.Now);
                contribution.create();

                creationFeedback.Text = "Project created successfully!";
                creationFeedback.ForeColor = System.Drawing.Color.Green;
            }
        }
        protected void contribute(object sender, EventArgs e)
        {
            if (creditsBox.Text.Length > 2)
            {
                if (Int32.Parse(creditsBox.Text) <= Int32.Parse(Session["UserCredit"].ToString()))
                {
                    //Get the query string parameters.
                    string projectTitle = Session["ProjectTitle"].ToString();
                    int projectCode = Int32.Parse(Session["ProjectCode"].ToString());
                    int credits = Int32.Parse(creditsBox.Text);

                    //Create a project and look for the one we are being asked.
                    ProjectBE project = new ProjectBE();
                    project.Code = projectCode;
                    project = project.getByCode();

                    project.Credit = project.Credit + credits;
                    project.PartitionCredit = project.PartitionCredit + credits;

                    project.update();

                    //We need the user, so we update its credits.
                    UserBE usuario = new UserBE();
                    usuario.Email = Session["UserEmail"].ToString();
                    usuario = usuario.getUserByEmail();
                    usuario.Credit = usuario.Credit - credits;
                    usuario.update();
                    Session["UserCredit"] = usuario.Credit;

                    //And we must also create the contribution entry.
                    ContributionBE contr = new ContributionBE(usuario, project, Int32.Parse(creditsBox.Text), DateTime.Now);
                    contr.create();

                    FeedbackCredit.Text = "Done!";
                    projectProfileLabelCredits.Text = project.Credit.ToString();
                    FeedbackCredit.Visible = true;
                }
                else
                {
                    FeedbackCredit.Text = "Wrong quantity.";
                    FeedbackCredit.Visible = true;
                }
            }
        }