json数组排序

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;