Asp.net導航控制項真的值得用嗎？

asp.net|導航|控制項

剛開始接觸menu控制項，感覺怎麼這麼彆扭啊。

首先說資料訪問部分，為了所謂的provider pattern，一層一層的封裝，而且都是些黑盒子，雖然概念是挺先進，結構好象也很清楚，但還是讓我覺的迷迷糊糊，至於嘛，只是想做幾個資料驅動的menu而已。還有那個前台的menu類，那麼多的Properties，尤其想到menu類也是個黑盒子，一點都不知道，它產生的xhtml會是什麼樣的，而我只有一點點css知識而已，想到這裡連嘗試的慾望都沒了。還不如自己動手親自寫一個menu呢，網上好象有好多現成的javascript類，比如這個：

 

Div_css 結構的，雖然沒有asp.net 控制項那麼漂亮，可也很是實用，至少都是透明的。不過後台有點麻煩，當時的想法是：

1 設計一個類sitemap，從資料庫裡讀導航資訊，然後存到一個dataset中，

2 在application_start 事件處理函數中 執行個體化一個sitemap 和一個sqlCachedependency ，插入到cache中。

3 一個dependency的回呼函數,以更新cache中的資料

4 從cache中提取資料產生menu。

這樣一來可以想象default.master的代碼的代碼會亂七八糟。非但不太容易寫，寫好的代碼也不太容易複用。而且還有關於cache的很多問題。

肯定有其他辦法，asp.net好多東西我都沒有接觸過。不過現在想想 provider pattern還是不錯，一層api串連展示層，一層api串連資料訪問層。

被迫學習menu類，希望它不要太讓人意外。終於明白為什麼開源讓那麼多人激動，開放透明啊！

/**//*****************************************************
* ypSlideOutMenu
* 3/04/2001
*
* a nice little script to create exclusive, slide-out
* menus for ns4, ns6, mozilla, opera, ie4, ie5 on
* mac and win32. I've got no linux or unix to test on but
* it should(?) work...
*
* Revised:
* - 08/29/2002 : added .hideAll()
* - 04/15/2004 : added .writeCSS() to support more
*
   
       
           
                than 30 menus.
*
* --youngpup--
*****************************************************/
ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 1000
ypSlideOutMenu.minCPUResolution = 10
// constructor
function ypSlideOutMenu(id, dir, left, top, width, height)
...{
this.ie = document.all ? 1 : 0
this.ns4 = document.layers ? 1 : 0
this.dom = document.getElementById ? 1 : 0
if (this.ie || this.ns4 || 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 = 0
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:10000; }'
strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
strCSS += 'width:' + width + 'px; '
strCSS += 'height:' + height + 'px; '
strCSS += 'clip:rect(0 ' + width + ' ' + height + ' 0); '
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 lyrId1 = this.id + "Container"
var lyrId2 = this.id + "Content"
var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1]
if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)
var temp
if (!obj1 || !obj2) window.setTimeout(this.gRef + ".load()", 100)
else ...{
this.container = obj1
this.menu = obj2
this.style = this.ns4 ? this.menu : this.menu.style
this.homePos = eval("0" + this.dirType + this.dim)
this.outPos = 0
this.accelConst = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen
// set event handlers.
if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')")
this.menu.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 (obj.container) ...{
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 (obj.container) ...{
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 = 0
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, 2) * 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.ns4 ? this.container : this.container.style
s.visibility = bShow ? "visible" : "hidden"
}
ypSlideOutMenu.prototype.moveTo = function(p) ...{
this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}
ypSlideOutMenu.prototype.getPos = function(c) ...{
return parseInt(this.style[c])
}
ypSlideOutMenu.prototype.onactivate = function() ...{ }
ypSlideOutMenu.prototype.ondeactivate = function() ...{ }