我已经更新从ASP.NET MVC 3的应用程序，以ASP.NET MVC 4。

I have updated an app from ASP.NET MVC 3 to ASP.NET MVC 4.

该应用程序的MVC 3不工作的MVC 4唯一的罚款是Ajax.Begin形式：形式默认为整页的请求，而不是异步AJAX请求。

The app worked fine in MVC 3. The only thing that isn't working in MVC 4 is Ajax.Begin form: the form defaults to full page requests, instead of async AJAX requests.

从本质上讲，这是我写的一个向导，但是这是无关紧要的。 Model.Step.ActionName正确返回一个字符串（见下文code）。

Essentially, it is a wizard that I have written, but that is irrelevant. Model.Step.ActionName correctly returns a string (see code below).

在code的看法是：

@{ 
    using (Ajax.BeginForm(Model.Step.ActionName, null, new AjaxOptions { UpdateTargetId = "wizardStep", OnBegin="isValid", LoadingElementId="PleaseWait", OnSuccess="SetFocusOnForm" }, 
        new {@name="wizardForm", @id="wizardForm" } ))
{

//form contents

}
}

渲染：

我注意到，Ajax.BeginForm在MVC 4使用HTML 5，我展示的MVC 3和MVC 4如何呈现以下表单的区别是：

The Rendering:

I note that Ajax.BeginForm in MVC 4 uses HTML 5. I show the difference between how MVC 3 and MVC 4 render the form below:

MVC 3：

<form action="/Solicitors/Company/New/YourDetails" id="wizardForm" method="post" name="wizardForm" onclick="Sys.Mvc.AsyncForm.handleClick(this, new Sys.UI.DomEvent(event));" onsubmit="Sys.Mvc.AsyncForm.handleSubmit(this, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, loadingElementId: 'PleaseWait', updateTargetId: 'wizardStep', onBegin: Function.createDelegate(this, isValid), onSuccess: Function.createDelegate(this, SetFocusOnForm) });">

// form contents

</form>

MVC 4：

<form action="/Solicitors/Company/New/LoginDetails" data-ajax="true" data-ajax-begin="isValid" data-ajax-loading="#PleaseWait" data-ajax-mode="replace" data-ajax-success="SetFocusOnForm" data-ajax-update="#wizardStep" id="wizardForm" method="post" name="wizardForm" novalidate="novalidate">

// form contents

</form>

我不知道这是否是正确的，但认为它是。

I have no idea if this is correct, but assume it is.

但问题是，阿贾克斯没有使用，只是整页刷新。所以sumat是错误的...

The problem, however, is that Ajax isn't used, just full page refreshes. So sumat is wrong...

现在的问题是：？！什么是错的。

The question is: What is wrong?!

推荐答案

好了，我已经解决了这个。

OK, I have solved this.

在MVC 3应用程序，我已经注释掉在web.config如下：

In the MVC 3 app, I had commented out the following in the web.config:

<appSettings>
    <add key="webpages:Version" value="1.0" />
    <!--<add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />-->
  </appSettings>

这也解释了为什么asp.net MVC 3不渲染HTML 5。

This explains why asp.net mvc 3 was not rendering html 5.

在新的MVC 4应用程序，默认设置具有 ClientValidationEnbled = TRUE 和 UnobstrusiveJavaScriptEnabled = TRUE ，如下

In the new mvc 4 app, the default setting has ClientValidationEnbled=true and UnobstrusiveJavaScriptEnabled=true, as follows:

<appSettings>
    <add key="webpages:Version" value="2.0.0.0" />
    ...
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>

所以，我的应用程序所需的下列JavaScript文件应包括：

So my app needed the following javascript files to be included:

<script src="@Url.Content("~/Scripts/jquery-1.7.1.min.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

和它需要微软的* .js文件扔掉，即：

And it needed the microsoft*.js files throwing away, ie:

@*<script src="@Url.Content("~/Scripts/MicrosoftAjax.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/MicrosoftMvcAjax.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/MicrosoftMvcValidation.js")" type="text/javascript"></script>*@

我想通了这一点阅读@Darin季米特洛夫回答以下问题后：

I figured this out after reading @Darin Dimitrov's reply to the following question:

是MicrosoftAjax.js，MicrosoftMvcAjax.js和MicrosoftMvcValidation.js过时ASP.NET MVC 3？

非常感谢达林。答案是值得一读，开导自己作为两个的appSettings我已经禁用的含义。

Many thanks to Darin. The answer is worth reading, to enlighten yourself as to the meaning of the two appSettings I had disabled.