Javascript中实现JSON数组多键值排序
2011-06-20 15:58 何朝阳 阅读(3066) 评论(0) 编辑 收藏 举报在某项目中,需要实现用户自定义菜单的显示顺序,以及某项菜单是否显示,摸索了很久,最后找到了一个自己比较满意的思路:
①首先在后台使用C#获取数据库中的菜单数据,生成一个包含菜单数据项的JSON数组(由于某种原因没有使用SQL中的ORDER BY),如下:
var menuData1=[ {"orderid":-10,"text":"主页","title":"个人网站主页","url":"Default.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":10,"text":"个人新闻","title":"个人新闻","url":"News.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":5,"text":"发表论文","title":"发表论文","url":"Paper.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":2,"text":"出版专著","title":"出版专著","url":"Monograph.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":7,"text":"参与项目","title":"参与项目","url":"Project.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":8,"text":"个人荣誉","title":"个人荣誉","url":"Prize.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":1,"text":"发明专利","title":"发明专利","url":"Patent.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":0,"text":"文件共享","title":"文件共享","url":"FileShare.aspx?TeacherID=153","visible":true,"target":"_self"} ];
②这时需要先将数组按orderid升序排序,注意,sort方法会改写原来的数组:
menuData1.sort(function(a, b) { return a.orderid > b.orderid ? 1 : -1;} );//升序
③经过排序后,结果为:
menuData1=[ {"orderid":-10,"text":"主页","title":"个人网站主页","url":"Default.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":0,"text":"文件共享","title":"文件共享","url":"FileShare.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":1,"text":"发明专利","title":"发明专利","url":"Patent.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":2,"text":"出版专著","title":"出版专著","url":"Monograph.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":5,"text":"发表论文","title":"发表论文","url":"Paper.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":7,"text":"参与项目","title":"参与项目","url":"Project.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":8,"text":"个人荣誉","title":"个人荣誉","url":"Prize.aspx?TeacherID=153","visible":true,"target":"_self"}, {"orderid":10,"text":"个人新闻","title":"个人新闻","url":"News.aspx?TeacherID=153","visible":true,"target":"_self"} ];
④然后根据menuData1[i].visible属性,将可视菜单项显示出来(其中String.Format见《在Javascript中实现类似C#中string.Format的功能》一文):
var menuString = "<ul><li class=\"menuDiv\"></li>"; for(var i=0;i<menuData1.length;i++) { if(menuData1[i].visible) { menuString += String.Format("<li><a title=\"{0}\" class=\"menuA\" onfocus=\"this.blur()\" href=\"{1}\" target=\"{2}\">{3}</a></li><li class=\"menuDiv\"></li>", menuData1[i].title, menuData1[i].url, menuData1[i].target, menuData1[i].text); } } menuString += "</ul>"; $(menuContainer).innerHTML = menuString;
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本文原创发表于博客园,作者为何朝阳,博客http://www.cnblogs.com/hechaoyang/
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本文原创发表于博客园,作者为何朝阳,博客http://www.cnblogs.com/hechaoyang/
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则视为侵权。