今天做项目时遇上一个需求,当浏览器或页面关闭时将数据存储到数据库内.实现思想是采用js监测onunload然后发送请求.结果失败,刷新可以发送但是关闭并不能,整了一整天并没有解决,最后找到了解决办法. 先贴个能实现功能的方法: function saveStatus(){ /*结束时保存设备状态*/ window.onbeforeunload=function(){//必须使用beforeunload var url ="device_saveDeviceStatus"; $.ajax
在WPF中设计登录窗口关闭时打开主窗口,自动生成的App.xaml不能满足要求, 1.把App.xaml的属性窗口中的生成操作设定为 无 2.添加Program类 static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { LoginWindow loginForm = new Lo
本文转载自:http://blog.csdn.net/wodewutai17quiet/article/details/76795951 问题:hadoop启动时,报ssh: Could not resolve hostname xxx: Name or service not known 错误信息: [root@master hadoop-2.2.0]# sbin/start-dfs.sh 17/08/06 13:08:59 WARN util.NativeCodeLoader: Unable
MyEclipse关闭时提示如下信息 Problems occurred while trying to save the state of the workbench. Internal Error Cannot set lower sequence number for root (previous: 16, new: 1). Location: D:\Workspaces\MyEclipse 2017 CI\.metadata\.plugins\org.eclipse.core.resou