private void MylibraryForm_Activated(object sender, EventArgs e) { if (!LoginFm.IsDisposed) { loginMode = LoginFm.CheckOutRight(); loginName = LoginFm.getLoginName(); loginID = LoginFm.getLoginID(); sysLogin = LoginFm.SystemLogin(); LoginFm.Dispose(); } if (loginMode) { this.systemLoginLable.Text = loginName + " 欢迎"; } }