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我在除了 IE 之外的其他浏览器上使用 Loader 时遇到问题。代码如下。下面是我在母版页中的 Div 标签代码。 

<div id="pnlPopup" class="PrProgress" style="display: none;">
        <div id="innerPopup" class="PrContainer">
            <div class="PrHeader">
                Loading, please wait...</div>
            <div class="PrBody">
                <img src="Images/activity.gif" alt=" "/>
            </div>
        </div>
    </div>

Masterpage中的Javascript函数如下

$(document).ready(function () {

            Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);        
            Sys.Application.add_load(applicationLoadHandler);
            Sys.Application.add_unload(applicationUnloadHandler);
            Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);
            Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(beginRequestHandler);
        });

我的CSS如下

<style>
  .PrProgress
{
    display: block;
    position: absolute;
    padding: 2px 3px;
}
.PrContainer
{
    border: solid 1px #808080;
    border-width: 1px 0px;
}
.PrHeader
{
    background: url('Images/sprite.png') repeat-x 0px 0px;
    border-color: #808080 #808080 #ccc;
    border-style: solid;
    border-width: 0px 1px 1px;
    padding: 0px 10px;
    color: #000000;
    font-size: 9pt;
    font-weight: bold;
    line-height: 1.9;  
    white-space:nowrap;
    font-family: arial,helvetica,clean,sans-serif;
}
.PrBody
{   width: 220px;
    height: 19px;
    background-color: #f2f2f2;
    border-color: #808080;
    border-style: solid;
    border-width: 0px 1px;
    padding: 10px;
}
    </style>

以下是Hedaer Tag中添加的脚本

<script src="js/jquery-1.8.3.js" type="text/javascript"></script>
<script src="js/pgbScript.js" type="text/javascript"></script>

以下是 pgbScript.js 代码

function applicationLoadHandler() {
    /// <summary>Raised after all scripts have been loaded and the objects in the application have been created and initialized.</summary>
};
function applicationUnloadHandler() {
    mainForm.CleanUp();
    mainForm = null;
    Sys.Application.dispose();
};
function beginRequestHandler() {
    /// <summary>Raised after an asynchronous postback is finished and control has been returned to the browser.</summary>
    mainForm.StartUpdating();
};
function endRequestHandler() {
    /// <summary>Raised before processing of an asynchronous postback starts and the postback request is sent to the server.</summary>
    // Set status bar text if any was passed through the hidden field on the form
    mainForm.EndUpdating()
};
var mainForm = 
{
    pnlPopup : "pnlPopup",
    innerPopup : "innerPopup",
    updating : false
};
mainForm.StartUpdating = function() {
    mainForm.updating = true;
    mainForm.AttachPopup();
    mainForm.onUpdating();
};
mainForm.EndUpdating = function() {
    mainForm.updating = false;
    mainForm.DetachPopup();
    mainForm.onUpdated();
};
mainForm.onUpdating = function(){
    if(mainForm.updating) {
        var pnlPopup = $get(this.pnlPopup);
        pnlPopup.style.display = '';         
        var docBounds = mainForm.GetClientBounds();
        var pnlPopupBounds = Sys.UI.DomElement.getBounds(pnlPopup);
//        var x = docBounds.x + Math.round(docBounds.width / 2) - Math.round(pnlPopupBounds.width / 2);
//        var y = docBounds.y + Math.round(docBounds.height / 2) - Math.round(pnlPopupBounds.height / 2);       
        var x = docBounds.x + Math.round(docBounds.width / 2) - pnlPopupBounds.width;
        var y = docBounds.y + Math.round(docBounds.height / 2) - pnlPopupBounds.height;
        Sys.UI.DomElement.setLocation(pnlPopup, x, y);
        //if(Sys.Browser.agent == Sys.Browser.InternetExplorer) {
            if(!pnlPopup.iFrame) {
                var iFrame = document.createElement("IFRAME");
                iFrame.scrolling= "no";
                iFrame.src = "nothing.txt";
                iFrame.frameBorder = 0;
                iFrame.style.display = "none";
                iFrame.style.position = "absolute";
                iFrame.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)";
                iFrame.style.zIndex = 1;
                pnlPopup.parentNode.insertBefore(iFrame, pnlPopup);
                pnlPopup.iFrame = iFrame;
            } 
            pnlPopup.iFrame.style.width = docBounds.width + "px";
            pnlPopup.iFrame.style.height = docBounds.height + "px";
            pnlPopup.iFrame.style.left = docBounds.x + "px";
            pnlPopup.iFrame.style.top = docBounds.y + "px";
            pnlPopup.iFrame.style.display = "block";      
        //}  
    }           
}
mainForm.onUpdated = function() {
    // get the update progress div
    var pnlPopup = $get(this.pnlPopup);
    // make it invisible
    pnlPopup.style.display = 'none';
    if(pnlPopup.iFrame) {
        pnlPopup.iFrame.style.display = "none";
    }
}; 
mainForm.AttachPopup = function() {
    /// <summary>
    /// Attach the event handlers for the popup
    /// </summary>
    this._scrollHandler = Function.createDelegate(this, this.onUpdating);
    this._resizeHandler = Function.createDelegate(this, this.onUpdating);    
    $addHandler(window, 'resize', this._resizeHandler);
    $addHandler(window, 'scroll', this._scrollHandler);
    this._windowHandlersAttached = true;
};
mainForm.DetachPopup = function() {
    /// <summary>
    /// Detach the event handlers for the popup
    /// </summary>
    if (this._windowHandlersAttached) {
        if (this._scrollHandler) {
            $removeHandler(window, 'scroll', this._scrollHandler);
        }
        if (this._resizeHandler) {
            $removeHandler(window, 'resize', this._resizeHandler);
        }
        this._scrollHandler = null;
        this._resizeHandler = null;
        this._windowHandlersAttached = false;
    }
};
mainForm.CleanUp = function() {
    /// <summary>
    /// CleanUp all resources held by mainForm object
    /// </summary>
    this.DetachPopup();
    var pnlPopup = $get(this.pnlPopup);
    if(pnlPopup && pnlPopup.iFrame) {
       pnlPopup.parentNode.removeChild(pnlPopup.iFrame);
       pnlPopup.iFrame = null;
    }
    this._scrollHandler = null;
    this._resizeHandler = null;
    this.pnlPopup = null;
    this.innerPopup = null;
    this.updating = null;
};
mainForm.GetClientBounds = function() {
    /// <summary>
    /// Gets the width and height of the browser client window (excluding scrollbars)
    /// </summary>
    /// <returns type="Sys.UI.Bounds">
    /// Browser's client width and height
    /// </returns>
    var clientWidth;
    var clientHeight;
    switch(Sys.Browser.agent) {
        case Sys.Browser.InternetExplorer:
            clientWidth = document.documentElement.clientWidth;
            clientHeight = document.documentElement.clientHeight;
            break;
        case Sys.Browser.Safari:
            clientWidth = window.innerWidth;
            clientHeight = window.innerHeight;
            break;
        case Sys.Browser.Opera:
            clientWidth = Math.min(window.innerWidth, document.body.clientWidth);
            clientHeight = Math.min(window.innerHeight, document.body.clientHeight);
            break;
        default:  // Sys.Browser.Firefox, etc.
            clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);
            clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);
            break;
    }
    var scrollLeft = (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
    var scrollTop = (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);
    return new Sys.UI.Bounds(scrollLeft, scrollTop, clientWidth, clientHeight);
}; 
if(typeof(Sys) !== "undefined")Sys.Application.notifyScriptLoaded();

加载程序在 IE 中运行良好。但是每当我在其他浏览器中浏览时都会出现错误，因为 找不到资源。在本地系统中。当我在生产服务器中托管相同的代码时。1）首先它会显示加载器 2）接下来的 404，找不到错误页面 3）几秒钟后我会得到请求的页面。

请让我知道如何避免找不到资源。和404，在请求中间找不到页面错误。

以下是来自生产服务器的错误

服务器错误

404 - 找不到文件或目录。您要查找的资源可能已被删除、名称已更改或暂时不可用。

以下是我的应用程序中本地系统的错误

“/ExecutionSystem”应用程序中的服务器错误。

无法找到该资源。

说明：HTTP 404。您要查找的资源（或其依赖项之一）可能已被删除、名称已更改或暂时不可用。请查看以下 URL 并确保其拼写正确。

请求的 URL：/ExecutionSystem/nothing.txt

版本信息：Microsoft .NET Framework 版本：4.0.30319；ASP.NET 版本：4.0.30319.1

4

1 回答 1

0

尝试给出更具体的 src 即：

iFrame.src = "~/nothing.txt";

因为 Internet Explorer 有时会解决其他浏览器无法解决的代码中的一些小错误。

于 2014-05-06T02:37:44.833 回答