知识大全 Asp.net导航控件真的值得用吗

Posted 2022-07-17 知

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开始接触menu控件感觉怎么这么别扭啊首先说数据访问部分为了所谓的provider pattern 一层一层的包装而且都是些黑盒子虽然概念是挺先进结构好象也很清楚但还是让我觉的迷迷糊糊至于嘛只是想做几个数据驱动的menu而已还有那个前台的menu类那么多的Properties 尤其想到menu类也是个黑盒子一点都不知道它生成的x会是什么样的而我只有一点点css知识而已想到这里连尝试的欲望都没了还不如自己动手亲自写一个menu呢网上好象有好多现成的javascript类比如这个 Div_css 结构的虽然没有控件那么漂亮可也很是实用至少都是透明的不过后台有点麻烦当时的想法是设计一个类sitemap 从数据库里读导航信息然后存到一个dataset中在application_start 事件处理函数中实例化一个sitemap 和一个sqlCachedependency 插入到cache中一个dependency的回调函数以更新cache中的数据从cache中提取数据生成menu 这样一来可以想象default master的代码的代码会乱七八糟非但不太容易写写好的代码也不太容易复用而且还有关于cache的很多问题肯定有其他办法好多东西我都没有接触过不过现在想想 provider pattern还是不错一层api连接表示层一层api连接数据访问层被迫学习menu类希望它不要太让人意外终于明白为什么开源让那么多人激动开放透明啊！ /**//***************************************************** * ypSlideOutMenu * / / * * a nice little script to create exclusive slide out * menus for ns ns mozilla opera ie ie on * mac and win I ve got no linux or unix to test on but * it should(?) work * * Revised: * / / : added hideAll() * / / : added writeCSS() to support more * than menus * * youngpup *****************************************************/ ypSlideOutMenu Registry = [] ypSlideOutMenu aniLen = ypSlideOutMenu hideDelay = ypSlideOutMenu minCPUResolution = // constructor function ypSlideOutMenu(id dir left top width height) this ie = document all ? : this ns = document layers ? : this dom = document getElementById ? : if (this ie || this ns || this dom) this id = id this dir = dir this orientation = dir == left || dir == right ? h : v this dirType = dir == right || dir == down ? : + this dim = this orientation == h ? width : height this hideTimer = false this aniTimer = false this open = false this over = false this startTime = this gRef = ypSlideOutMenu_ +id eval(this gRef+ =this ) ypSlideOutMenu Registry[id] = this var d = document var strCSS = ; strCSS += # + this id + Container visibility:hidden; strCSS += left: + left + px; strCSS += top: + top + px; strCSS += overflow:hidden; z index: ; strCSS += # + this id + Container # + this id + Content position:absolute; strCSS += width: + width + px; strCSS += height: + height + px; strCSS += clip:rect( + width + + height + ); strCSS += this css = strCSS; this load() ypSlideOutMenu writeCSS = function() document writeln( <style type= text/css > ); for (var id in ypSlideOutMenu Registry) document writeln(ypSlideOutMenu Registry[id] css); document writeln( </style> ); ypSlideOutMenu prototype load = function() var d = document var lyrId = this id + Container var lyrId = this id + Content var obj = this dom ? d getElementById(lyrId ) : this ie ? d all[lyrId ] : d layers[lyrId ] if (obj ) var obj = this ns ? obj layers[lyrId ] : this ie ? d all[lyrId ] : d getElementById(lyrId ) var temp if (!obj || !obj ) window setTimeout(this gRef + load() ) else ntainer = obj nu = obj this style = this ns ? nu : nu style this homePos = eval( + this dirType + this dim) this outPos = this accelConst = (this outPos this homePos) / ypSlideOutMenu aniLen / ypSlideOutMenu aniLen // set event handlers if (this ns ) nu captureEvents(Event MOUSEOVER | Event MOUSEOUT); nu onmouseover = new Function( ypSlideOutMenu showMenu( + this id + ) ) nu onmouseout = new Function( ypSlideOutMenu hideMenu( + this id + ) ) //set initial state this endSlide() ypSlideOutMenu showMenu = function(id) var reg = ypSlideOutMenu Registry var obj = ypSlideOutMenu Registry[id] if (ntainer) obj over = true for (menu in reg) if (id != menu) ypSlideOutMenu hide(menu) if (obj hideTimer) reg[id] hideTimer = window clearTimeout(reg[id] hideTimer) if (!obj open && !obj aniTimer) reg[id] startSlide(true) ypSlideOutMenu hideMenu = function(id) var obj = ypSlideOutMenu Registry[id] if (ntainer) if (obj hideTimer) window clearTimeout(obj hideTimer) obj hideTimer = window setTimeout( ypSlideOutMenu hide( + id + ) ypSlideOutMenu hideDelay); ypSlideOutMenu hideAll = function() var reg = ypSlideOutMenu Registry for (menu in reg) ypSlideOutMenu hide(menu); if (menu hideTimer) window clearTimeout(menu hideTimer); ypSlideOutMenu hide = function(id) var obj = ypSlideOutMenu Registry[id] obj over = false if (obj hideTimer) window clearTimeout(obj hideTimer) obj hideTimer = if (obj open && !obj aniTimer) obj startSlide(false) ypSlideOutMenu prototype startSlide = function(open) this[open ? onactivate : ondeactivate ]() this open = open if (open) this setVisibility(true) this startTime = (new Date()) getTime() this aniTimer = window setInterval(this gRef + slide() ypSlideOutMenu minCPUResolution) ypSlideOutMenu prototype slide = function() var elapsed = (new Date()) getTime() this startTime if (elapsed > ypSlideOutMenu aniLen) this endSlide() else var d = Math round(Math pow(ypSlideOutMenu aniLen elapsed ) * this accelConst) if (this open && this dirType == ) d = d else if (this open && this dirType == + ) d = d else if (!this open && this dirType == ) d = this dim + d else d = this dim + d this moveTo(d) ypSlideOutMenu prototype endSlide = function() this aniTimer = window clearTimeout(this aniTimer) this moveTo(this open ? this outPos : this homePos) if (!this open) this setVisibility(false) if ((this open && !this over) || (!this open && this over)) this startSlide(this over) ypSlideOutMenu prototype setVisibility = function(bShow) var s = this ns ? ntainer : ntainer style s visibility = bShow ? visible : hidden ypSlideOutMenu prototype moveTo = function(p) this style[this orientation == h ? left : top ] = this ns ? p : p + px ypSlideOutMenu prototype getPos = function(c) return parseInt(this style[c]) ypSlideOutMenu prototype onactivate = function() ypSlideOutMenu prototype ondeactivate = function() cha138/Article/program/net/201311/12693