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遇到一个后台注册js问题 希望哪位给我解释下 不胜感激

0
悬赏园豆:20 [已解决问题] 解决于 2013-01-25 22:52

第1步 我在页面上写了一个element (一个用于前台操作js,一个后台注册):

<a href="javascript:void(0)" id="Linktest">我在测试submodal</a>
<asp:Button ID="btntest" runat="server" Text="测试后台注册脚本" OnClick="btntest_Click" />

第2步 写js:

<script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
<link rel="stylesheet" href="Scripts/ScriptByColin/subModal/subModal.css" type="text/css" />
<script src="Scripts/ScriptByColin/subModal/common.js" type="text/javascript"></script>
<script src="Scripts/ScriptByColin/subModal/subModal.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#Linktest").click(function () {
showPopWin("About.aspx", 900, 600, null, true);
});
});

///用于后台注册时调用
function set() {
showPopWin("About.aspx", 900, 600, null, true);
}

后台方法关键语句为:

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "test", "set()", true);

第三步:测试前台 调用showPopWin函数 然后逐步进入subModal.js中  先执行一个初始化函数initPopUp()  然后真正执行showPopWin()函数  一切正常

第四步:测试后台注册脚本  调用showPopWin函数  进入subModal.js中  直接进入showPopWin()函数 了 而没有进入初始化函数  结果当然是报错了  希望哪位给解释下

海上将军的主页 海上将军 | 菜鸟二级 | 园豆:306
提问于:2013-01-09 22:31
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最佳答案
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1. 要了解 浏览器解析的顺序,浏览器 解析是从上至下 来解析js,解析js是同步的,也就是说js 可以卡住页面。

2.this.Page.ClientScript.RegisterStartupScript 这个注册的js 是注册在哪个地方,和 你引用的js文件顺序很重要,因为浏览器解析js是按顺序的。

3. 光贴后台代码还不够,你要把 你这个页面生成html代码贴出来,就一目了然了。

收获园豆:10
Qlin | 老鸟四级 |园豆:2403 | 2013-01-10 09:11

this.Page.ClientScript.RegisterStartupScript  这个方法是在htm生成后 加载在body后面的 理论上这个时候js已经加载完了吧  我现在贴页面源码:

 

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>

</title>
<script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
<link rel="stylesheet" href="Scripts/ScriptByColin/subModal/subModal.css" type="text/css" />
<script src="Scripts/ScriptByColin/subModal/common.js" type="text/javascript"></script>
<script src="Scripts/ScriptByColin/subModal/subModal.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#Linktest").click(function () {
showPopWin("About.aspx", 900, 600, null, true);
});
});
function set() {
showPopWin("About.aspx", 900, 600, null, true);
}
</script>
</head>
<body>
<form method="post" action="WebForm1.aspx" id="form1">
<div class="aspNetHidden">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="tk/13YtKkPOjqEf4PgIUM1QGSdYyh7tQS9NikJEj/WDAVshCOvCNyk3V8MCpVu0uoTbIp9mHHK0ZNrBmiw9k4WCWl3d/kBvANqyuridwpTA=" />
</div>

<div class="aspNetHidden">

<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="6jLZqpl1ExvbQJPw8NKh6dN76mEvKR2Egqc/fFHhFaevZjFJT2oPaMSIJN3WQtvYARFqtgO0b8TOhCZuWr5y6A7DCv9iXnYQuYPuVluTZ1Tmo2wSxv6elrTKfIRBVjyT" />
</div>
<div>
<a href="javascript:void(0)" onclick="set()">我在测试submodal</a>
<input type="submit" name="btntest" value="测试后台注册脚本" id="btntest" />

</div>

<script type="text/javascript">
//<![CDATA[
set()//]]>

海上将军 | 园豆:306 (菜鸟二级) | 2013-01-10 09:28

@enpos: 

看看firebug中的错误信息, 或者 直接复制你的 代码 在页面中执行试试,再看错误信息。

Qlin | 园豆:2403 (老鸟四级) | 2013-01-10 09:37
其他回答(3)
0

不知道你的initPopUp函数写在什么地方,如果你只调用了showPopWin()他只会执行showPopWin(),如果你还想调用别的,要么在test中加入要执行的函数,要么写在showPopWin()中。

收获园豆:5
Loui | 园豆:228 (菜鸟二级) | 2013-01-09 23:01

这个initPopUp函数 是在我调用的Scripts/ScriptByColin/subModal/subModal.js中的  我前台执行showPopWin()的时候 它会进这个js 先执行initPopUp函数  再执行showPopWin()函数 但是后台进去的话 初始化这个函数并没有执行 而是直接执行showPopWin()

支持(0) 反对(0) 海上将军 | 园豆:306 (菜鸟二级) | 2013-01-10 07:35

@Loui: 

/**  * SUBMODAL v1.6  * Used for displaying DHTML only popups instead of using buggy modal windows.  *  * By Subimage LLC  * http://www.subimage.com  *  * Contributions by:  *  Eric Angel - tab index code  *  Scott - hiding/showing selects for IE users  * Todd Huss - inserting modal dynamically and anchor classes  *  * Up to date code can be found at http://submodal.googlecode.com  */

// Popup code var gPopupMask = null; var gPopupContainer = null; var gPopFrame = null; var gReturnFunc; var gPopupIsShown = false; var gDefaultPage = "Scripts/subModal/loading.html"; var gHideSelects = false; var gReturnVal = null;

var gTabIndexes = new Array(); // Pre-defined list of tags we want to disable/enable tabbing into var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME"); 

// If using Mozilla or Firefox, use Tab-key trap. if (!document.all) {  document.onkeypress = keyDownHandler; }

/**  * Initializes popup code on load.   */ function initPopUp() {  // Add the HTML to the body  theBody = document.getElementsByTagName('BODY')[0];  popmask = document.createElement('div');  popmask.id = 'popupMask';  popcont = document.createElement('div');  popcont.id = 'popupContainer';  popcont.innerHTML = '' +   '<div id="popupInner">' +    '<div id="popupTitleBar">' +     '<div id="popupTitle"></div>' +     '<div id="popupControls" onclick="hidePopWin(false);"  >' +      '<img style=" width:0; left:0; display:none;" id="popCloseBox" />' +     '</div>' +    '</div>' +    '<iframe src="'+ gDefaultPage +'" style="width:100%;height:100%;background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +   '</div>';  theBody.appendChild(popmask);  theBody.appendChild(popcont);    gPopupMask = document.getElementById("popupMask");  gPopupContainer = document.getElementById("popupContainer");  gPopFrame = document.getElementById("popupFrame");     // check to see if this is IE version 6 or lower. hide select boxes if so  // maybe they'll fix this in version 7?  var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);  if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {   gHideSelects = true;  }    // Add onclick handlers to 'a' elements of class submodal or submodal-width-height  var elms = document.getElementsByTagName('a');  for (i = 0; i < elms.length; i++) {   if (elms[i].className.indexOf("submodal") == 0) {    // var onclick = 'function (){showPopWin(\''+elms[i].href+'\','+width+', '+height+', null);return false;};';    // elms[i].onclick = eval(onclick);    elms[i].onclick = function(){     // default width and height     var width = 400;     var height = 200;     // Parse out optional width and height from className     params = this.className.split('-');     if (params.length == 3) {      width = parseInt(params[1]);      height = parseInt(params[2]);     }     showPopWin(this.href,width,height,null); return false;    }   }  } } addEvent(window, "load", initPopUp);

 /**  * @argument width - int in pixels  * @argument height - int in pixels  * @argument url - url to display  * @argument returnFunc - function to call when returning true from the window.  * @argument showCloseBox - show the close box - default true  */ function showPopWin(url, width, height, returnFunc, showCloseBox) {     //if exists document.getElementById("popupControls");     if (document.getElementById("popupControls") == null) {         initPopUp();     }  // show or hide the window close widget  if (showCloseBox == null || showCloseBox == true) {      document.getElementById("popupControls").style.display = "block";  } else {  document.getElementById("popupControls").style.display = "none";  }  gPopupIsShown = true;  disableTabIndexes();  gPopupMask.style.display = "block";  gPopupContainer.style.display = "block";  // calculate where to place the window on screen  centerPopWin(width, height);    var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);

 gPopupContainer.style.width = width + "px";  gPopupContainer.style.height = (height+titleBarHeight) + "px";    setMaskSize();

 // need to set the width of the iframe to the title bar width because of the dropshadow  // some oddness was occuring and causing the frame to poke outside the border in IE6  gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";  gPopFrame.style.height = (height) + "px";

 // set the url  var SDTail;//定义URL尾,生成随机数,防止浏览器缓存 by sinodier 2011年9月3日 15:30:29  if (url!=null)  {          if(url.indexOf("?")>-1 )          {              SDTail = '&tail=' + Math.round(Math.random() * 10000);          }          else          {              SDTail = '?tail=' + Math.round(Math.random() * 10000);          }          url = url + SDTail;  }

 gPopFrame.src = url ;

 gReturnFunc = returnFunc;  // for IE  if (gHideSelects == true) {   hideSelectBoxes();  }    window.setTimeout("setPopTitle();", 600); }

// var gi = 0; function centerPopWin(width, height) {  if (gPopupIsShown == true) {   if (width == null || isNaN(width)) {    width = gPopupContainer.offsetWidth;   }   if (height == null) {    height = gPopupContainer.offsetHeight;   }      //var theBody = document.documentElement;   var theBody = document.getElementsByTagName("BODY")[0];   //theBody.style.overflow = "hidden";   var scTop = parseInt(getScrollTop(),10);   var scLeft = parseInt(theBody.scrollLeft,10);     setMaskSize();      //window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;      var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);      var fullHeight = getViewportHeight();   var fullWidth = getViewportWidth();      gPopupContainer.style.top = (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + "px";   gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";   //alert(fullWidth + " " + width + " " + gPopupContainer.style.left);  } } addEvent(window, "resize", centerPopWin); addEvent(window, "scroll", centerPopWin); window.onscroll = centerPopWin;

/**  * Sets the size of the popup mask.  *  */ function setMaskSize() {  var theBody = document.getElementsByTagName("BODY")[0];      var fullHeight = getViewportHeight();  var fullWidth = getViewportWidth();    // Determine what's bigger, scrollHeight or fullHeight / width  if (fullHeight > theBody.scrollHeight) {   popHeight = fullHeight;  } else {   popHeight = theBody.scrollHeight;  }    if (fullWidth > theBody.scrollWidth) {   popWidth = fullWidth;  } else {   popWidth = theBody.scrollWidth;  }    gPopupMask.style.height = popHeight + "px";  gPopupMask.style.width = popWidth + "px"; }

/**  * @argument callReturnFunc - bool - determines if we call the return function specified  * @argument returnVal - anything - return value  */ function hidePopWin(callReturnFunc) {  gPopupIsShown = false;  var theBody = document.getElementsByTagName("BODY")[0];  theBody.style.overflow = "";  restoreTabIndexes();  if (gPopupMask == null) {   return;  }  gPopupMask.style.display = "none";  gPopupContainer.style.display = "none";  if (callReturnFunc == true && gReturnFunc != null) {   // Set the return code to run in a timeout.   // Was having issues using with an Ajax.Request();   gReturnVal = window.frames["popupFrame"].returnVal;   window.setTimeout('gReturnFunc(gReturnVal);', 1);  }  gPopFrame.src = gDefaultPage;  // display all select boxes  if (gHideSelects == true) {   displaySelectBoxes();  } }

/**  * Sets the popup title based on the title of the html document it contains.  * Uses a timeout to keep checking until the title is valid.  */ function setPopTitle() {  return;  if (window.frames["popupFrame"].document.title == null) {   window.setTimeout("setPopTitle();", 10);  } else {   document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;  } }

// Tab key trap. iff popup is shown and key was [TAB], suppress it. // @argument e - event - keyboard event that caused this function to be called. function keyDownHandler(e) {     if (gPopupIsShown && e.keyCode == 9)  return false; }

// For IE.  Go through predefined tags and disable tabbing into them. function disableTabIndexes() {  if (document.all) {   var i = 0;   for (var j = 0; j < gTabbableTags.length; j++) {    var tagElements = document.getElementsByTagName(gTabbableTags[j]);    for (var k = 0 ; k < tagElements.length; k++) {     gTabIndexes[i] = tagElements[k].tabIndex;     tagElements[k].tabIndex="-1";     i++;    }   }  } }

// For IE. Restore tab-indexes. function restoreTabIndexes() {  if (document.all) {   var i = 0;   for (var j = 0; j < gTabbableTags.length; j++) {    var tagElements = document.getElementsByTagName(gTabbableTags[j]);    for (var k = 0 ; k < tagElements.length; k++) {     tagElements[k].tabIndex = gTabIndexes[i];     tagElements[k].tabEnabled = true;     i++;    }   }  } }

/**  * Hides all drop down form select boxes on the screen so they do not appear above the mask layer.  * IE has a problem with wanted select form tags to always be the topmost z-index or layer  *  * Thanks for the code Scott!  */ function hideSelectBoxes() {   var x = document.getElementsByTagName("SELECT");

  for (i=0;x && i < x.length; i++) {     x[i].style.visibility = "hidden";   } }

/**  * Makes all drop down form select boxes on the screen visible so they do not  * reappear after the dialog is closed.  *  * IE has a problem with wanting select form tags to always be the  * topmost z-index or layer.  */ function displaySelectBoxes() {   var x = document.getElementsByTagName("SELECT");

  for (i=0;x && i < x.length; i++){     x[i].style.visibility = "visible";   } }

支持(0) 反对(0) 海上将军 | 园豆:306 (菜鸟二级) | 2013-01-12 23:19

从原理上看不出来什么问题,建议你写个小的demo来测,试把js文件中的慢慢的减少,用排除法。@enpos

支持(0) 反对(0) Loui | 园豆:228 (菜鸟二级) | 2013-01-17 10:24
0

你直接调用set()是不行的,应该加上srcript标签

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "test", "<script>set();</script>", true);

收获园豆:5
Rich.T | 园豆:3440 (老鸟四级) | 2013-01-10 09:19

经验证 不加标签是 htm生成代码为:

<script type="text/javascript">
//<![CDATA[
set()//]]>
</script>

加标签 生成代码为:

<script type="text/javascript">
//<![CDATA[
<script>set()</script>//]]>
</script>

加了甚至报错 而且我写了这么长时间一直没加这个标签 我一般在response.write时候会加这个标签

支持(0) 反对(0) 海上将军 | 园豆:306 (菜鸟二级) | 2013-01-10 09:33

@enpos: 

恩,没注意第三个参数写的True

支持(0) 反对(0) Rich.T | 园豆:3440 (老鸟四级) | 2013-01-10 09:42

@Rich.T: :)么事么事

支持(0) 反对(0) 海上将军 | 园豆:306 (菜鸟二级) | 2013-01-10 10:03

@enpos: 

我觉得应该是页面还没有加载完就执行了,这样看看

this.Page.ClientScript.RegisterStartupScript(this.GetType(), "test", "window.onload=function(){set();}", true);

支持(0) 反对(0) Rich.T | 园豆:3440 (老鸟四级) | 2013-01-10 10:06

@Rich.T: 我也觉得还是没有加载的问题  你的方法试了还是一样的 没办法了 改了下js文件  我在前台调用js中方法showPopWin时判断有没有初始化 没有初始化的时候 初始化下就好了  但是就是不知道问题所在

支持(0) 反对(0) 海上将军 | 园豆:306 (菜鸟二级) | 2013-01-10 13:48
0

不知道什么原因 自己修改了下js

海上将军 | 园豆:306 (菜鸟二级) | 2013-01-16 11:12
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