blocks|key|1678567|text|这是一个常见的错误，当您尝试调用函数时，页面甚至还没有加载它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1678568|因此，在dom准备好时，以太运行您的代码(如pageload)，然后将代码放在scriptmanager标记之后，或者检查将其放在脚本管理器的javascript加载之后。|1678569|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This is a common error that happens when you try to call framework javascript function before page have even loaded them.

So ether run your code when dom is ready (eg pageload), ether place your code after the scriptmanager tag, or check to place it after the javascript load from scriptmanager.

blocks|key|481054|text|以下是朱盖斯从线程+on+asp.net论坛得到的答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|481055|原因:当使用URL路由模块时，脚本管理器生成的javascript的路径会发生变化。|481056|解决方案:告诉路由API不要路由扩展名为"axd“的文件(由脚本管理器生成的文件)|481057|将此规则添加到在Global.asax中注册路由规则的方法中|481058|+routes.Ignore("{resource}.axd/{*pathInfo}");|code-block|syntax|javascript|481059|此外，您应该在web.config中有此部分。|481060|<system.webServer>
++++<modules+runAllManagedModulesForAllRequests="true"+/>
</system.webServer>|481061|entityMap|0|LINK|mutability|MUTABLE|url|http://forums.asp.net/members/zhughes.aspx|1|http://forums.asp.net/p/1602365/4082643.aspx#4082643^0|3|3|0|7|2|1|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]|$A|16|B|17|1|18]]|C|$]]|$1|D|3|E|5|6|7|19|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1A|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|1B|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|1C|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1D|8|@]|9|@]|C|$]]|$1|Q|3|R|5|L|7|1E|8|@]|9|@]|C|$M|N]]|$1|S|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

Here is the answer by <a href="http://forums.asp.net/members/zhughes.aspx" rel="noreferrer">zhughes</a> from this <a href="http://forums.asp.net/p/1602365/4082643.aspx#4082643" rel="noreferrer">thread</a> on asp.net forum.

The Reason : the path of the javascript generated by the scriptmanager changes when the URL Routing module is used.

The Solution : Tell the routing API to not route the files with "axd" extension (the files generated by the scriptmanager)

Add this rule to the method where you register the routing rules in Global.asax

<pre><code> routes.Ignore("{resource}.axd/{*pathInfo}");
</code></pre>

in addition you should have this section in web.config

<pre><code>&lt;system.webServer&gt;
 &lt;modules runAllManagedModulesForAllRequests="true" /&gt;
&lt;/system.webServer&gt;
</code></pre>

blocks|key|1678609|text|我遇到了这个问题，并从强大的谷歌寻求答案，尝试了各种建议，包括上述的，但没有运气。放弃了，继续做其他的工作，几天后回来，问题已经消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1678610|我继续工作，做了一些代码修改，并公布了我的网站和问题再次出现。回到谷歌，发现有人在使用3.5框架时出现了问题。在这种情况下，s/他能够通过进入“添加/删除程序”控制面板并选择修复选项来解决问题。|1678611|我也这样做了，修复了'MS+.NET+Framework4ClientProfile‘和'MS+.NET+Framework4Extendeded’。帮我解决了问题。|1678612|希望能为别人解决这个问题。|1678613|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I had this problem and sought an answer from the almighty Google, tried various suggestions including the ones above but had no luck. Gave up and moved on to other work, came back a few days later and the problem had disappeared.

I resumed work, made some code changes and published my website and the problem reappeared. Went back to the Google and came across someone who had the problem while using the 3.5 framework. In that case s/he was able to resolve the problem by going to the 'Add/Remove Programs' control panel and selecting the repair option.

I did likewise, repairing the 'MS .NET Framework 4 Client Profile' and 'MS .NET Framework 4 Extended'. That fixed the problem for me.

Hope that solves it for someone else.

blocks|key|1678638|text|我也有同样的问题。我安装了VS+2010+SP1，问题就解决了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1678639|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I was having the same problem. I installed VS 2010 SP1 and the problem went away.

blocks|key|481133|text|我也遇到了同样的问题，我通过在Framework4.0文件夹上运行命令aspnet_regiis+-i来解决这个问题(我的应用程序是在这个文件夹上运行的)。这是IIS的Handler映射中的一个问题:这个操作为我解决了问题。另见这个职位。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|481134|希望这能帮上忙。|481135|entityMap|0|LINK|mutability|MUTABLE|url|http://www.roelvanlisdonk.nl/?p=1836&cpage=1#comment-2321^0|Z|G|36|4|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

I had the same problem and I solved it by run the command aspnet_regiis -i on the folder of the Framework 4.0 (on which my application ran). It was a problem on the Handler Mapping of IIS: this operation fix the problem for me. 
See also <a href="http://www.roelvanlisdonk.nl/?p=1836&amp;cpage=1#comment-2321" rel="nofollow">this post</a>.

Hope this could be helpful.

blocks|key|481170|text|在我的例子中，它是IISExpress，切换回cassini+dev服务器修复我的头痛。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|481171|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

in my case, it's IISExpress, switch back to the cassini dev server fix my headache.

blocks|key|481184|text|我在处理母版页时也遇到了这个问题，在我的例子中，是一个“基本”的元设置让我很困惑。我确实记得他们在某个地方读过另一篇文章/博客，其中提到了不同域的ajax验证问题，导致了这种错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|481185|因此，在我的例子中，我有一个<base...>引用设置站点的默认url，但是我的dev显然是一个不同的url...thus冲突，并且"ASP.NET+Ajax客户端框架加载失败“。错误。|offset|length|style|CODE|481186|把基地移开voila...error就不见了。|481187|HTH|481188|戴夫|481189|entityMap^0|0|E|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|V|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|O|$]]

I had this problem as well dealing with a master page and in my case it was a "Base" meta setting that was messing me up. I do recall reading another article/blog somewhere where they mentioned an issue with ajax validation across different domains causing this type of error.

So in my case, I had a <code>&lt;base...&gt;</code> reference setting the default url for the site but my dev was obviously a different url...thus conflict and the "ASP.NET Ajax client-side framework failed to load." error.

Removed the base and voila...error gone.

HTH

Dave

blocks|key|1678756|text|我发现这可能是一个缓存/压缩问题，通过将以下内容放入Web.Config，可以解决这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1678757|<system.web.extensions>
++++<scripting>
++++++<scriptResourceHandler+enableCaching="false"+enableCompression="false"+/>
++++</scripting>
</system.web.extensions>|code-block|syntax|javascript|1678758|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have found that this is a possibly a caching/compression issue and by putting in the following into Web.Config, resolves the issue.

<pre><code>&lt;system.web.extensions&gt;
 &lt;scripting&gt;
 &lt;scriptResourceHandler enableCaching="false" enableCompression="false" /&gt;
 &lt;/scripting&gt;
&lt;/system.web.extensions&gt;
</code></pre>

blocks|key|481217|text|Microsoft运行时错误:+JScript客户端框架加载失败.|type|unstyled|depth|inlineStyleRanges|entityRanges|data|481218|添加这样的引用。|481219|<add+assembly="System.Web.Extensions,+Version=3.5.0.0,+Culture=neutral,+PublicKeyToken=31BF3856AD364E35"/>++++++++++++++
<add+assembly="System.Data.Entity,+Version=3.5.0.0,+Culture=neutral,+PublicKeyToken=B77A5C561934E089"/>
<add+assembly="System.Data.Services,+Version=3.5.0.0,+Culture=neutral,+PublicKeyToken=B77A5C561934E089"/>
<add+assembly="System.Data.Services.Client,+Version=3.5.0.0,+Culture=neutral,+PublicKeyToken=B77A5C561934E089"/>|code-block|syntax|javascript|481220|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Microsoft JScript runtime error: ASP.NET Ajax client-side framework failed to load.

Add reference like this..

<pre><code>&lt;add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/&gt; 
&lt;add assembly="System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
&lt;add assembly="System.Data.Services, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
&lt;add assembly="System.Data.Services.Client, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/&gt;
</code></pre>

blocks|key|481240|text|它可能只是在您的web.config中缺少部分，如<Handlers>+of+<httpHandlers>，我的建议是，如果您有旧的副本您的web配置尝试它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|481241|entityMap^0|P|A|13|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

It may be simply missing part in your web.config like the <code>&lt;Handlers&gt;</code> of <code>&lt;httpHandlers&gt;</code>, my advice is if you have old copy of your web config try it out.

blocks|key|481245|text|如果使用URL重写模块，则在每个重写规则中添加|type|unstyled|depth|inlineStyleRanges|entityRanges|data|481246|<add+input="{URL}"+pattern="\.axd$"+negate="true"/>|code-block|syntax|javascript|481247|在条件标签下，如下所示：|481248|<rule+name="HomeRewrite"+stopProcessing="true">
+++<match+url="%5Ehome$"/>
+++<conditions>
+++++<add+input="{URL}"+pattern="\.axd$"+negate="true"/>
+++</conditions>
+++<action+type="Rewrite"+url="/home.aspx"/>
</rule>|481249|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

if you using URL rewrite module, then in each rewrite rule add

<pre><code>&lt;add input="{URL}" pattern="\.axd$" negate="true"/&gt;
</code></pre>

under conditions tag, like this:

<pre><code>&lt;rule name="HomeRewrite" stopProcessing="true"&gt;
 &lt;match url="^home$"/&gt;
 &lt;conditions&gt;
 &lt;add input="{URL}" pattern="\.axd$" negate="true"/&gt;
 &lt;/conditions&gt;
 &lt;action type="Rewrite" url="/home.aspx"/&gt;
&lt;/rule&gt;
</code></pre>

blocks|key|1678854|text|如果您的计算机中没有.Net+Framework4.0客户端配置文件，那么请修复.net框架工作4.0或重新安装。|type|ordered-list-item|depth|inlineStyleRanges|entityRanges|data|1678855|转到Property并选择目标框架3.5。|1678856|unstyled|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|H|8|@]|9|@]|A|$]]|$1|D|3|-4|5|E|7|I|8|@]|9|@]|A|$]]]|F|$]]

<ol>
<li>If .Net Framework 4.0 client Profile is not available in your machine , so repair .net Frame work 4.0 or re install .</li>
<li>go to Project Property and select target framework 3.5.</li>
</ol>

blocks|key|1678874|text|在我的例子中，拒绝Ajax请求的是微软的UrlScan工具。禁用它解决了问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1678875|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case it was the UrlScan tool by Microsoft that was rejecting some URL's requested by Ajax. Disabling it solved the problem.

I got a complicated problem with ASP.Net 4.0 Ajax....I started a website with Visual Studio 2010 on my machine,and added some update panels they used to work fine,but suddenly i got that series of errors when i run my website
<blockquote>
Microsoft JScript runtime error: ASP.NET Ajax client-side framework failed to load.
Microsoft JScript runtime error: 'Sys' is undefined
</blockquote>
The strange things is that i made a website on the same machine with VS 2010 and the update panels there work perfectly.i took its web.config to my new website and changed just the connection..and i got the same error
I tried to search for a solution but i failed to find any real solution.Can anyone help?

Ajax client-side framework failed to load Asp.Net 4.0

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我遇到了一个复杂的ASP.Net 4.0 Ajax的问题.我在我的机器上用Visual 2010创建了一个网站，并添加了一些更新面板，这些面板过去工作得很好，但是当我运行我的网站时突然发现了一系列错误。Microsoft运行时错误: JScript客户端框架加载失败.Microsoft JScript运行时错误：“Sy...

问Ajax客户端框架未能加载Asp.Net 4.0
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