private void btnLoad_Click(object sender, EventArgs e) { try { ManagerInfo mi = new ManagerInfo(); mi.MName = txtUser.Text; mi.MPwd = txtPwd.Text; ManagerInfoBll miBll = new ManagerInfoBll(); if (miBll.Load(mi)) { string overdatestr = ConfigurationManager.ConnectionStrings["date"].ConnectionString; DateTime overdate = Convert.ToDateTime(overdatestr); if (DateTime.Now.Date < overdate.Date) { Mainform mainform = new Mainform(); mainform.Tag = mi.MType; mainform.Show(); this.Visible = false; } else { MessageBox.Show("系统文件缺失,请联系开发人员QQ:1517680389"); } } else { MessageBox.Show("用户名或密码错误"); } } catch { MessageBox.Show("数据库连接错误,请联系小雨QQ:1517680389"); } }