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指定布局时多次调用 MVC 控制器操作

[英]MVC Controller Action Gets Called Multiple Times When Layout Is Specified

 原文  2012-12-23 18:25:10  3   6    c#/ asp.net/ asp.net-mvc/ asp.net-mvc-3/ asp.net-mvc-4

问题描述

I'm having a problem where a controller action is called at least twice.我遇到了一个问题，控制器操作至少被调用两次。 I have a view that has another view as its layout page, and the view is called multiple times.我有一个视图，它的布局页面有另一个视图，并且该视图被多次调用。 If I remove the specification for the layout then the action is consistently executed once.如果我删除了布局的规范，那么该操作将始终执行一次。 I looked through StackOverflow and other sites but couldn't find a problem which had the same characteristics as mine so I'm posting a new question.我浏览了 StackOverflow 和其他网站，但找不到与我的特征相同的问题，所以我发布了一个新问题。

_ViewStart.cshtml:
@{
   Layout = "~/Views/Shared/_ProfileLayout.cshtml";
}

Index.cshtml inside my Profile folder: @{
ViewBag.Title = "Index";    
}
Index

Controller Action:
public ActionResult Index()
    {            
        //ToDo: BusinessLogic
        //This method gets called twice
        //******************//
        return View();
    }

It seem's like a simple problem and I'm definitely missing something obvious.这似乎是一个简单的问题，我肯定遗漏了一些明显的东西。 I've posted the sample project on this site: https://skydrive.live.com/#cid=F2DAB940147490B0&id=F2DAB940147490B0%21140我已经在这个网站上发布了示例项目： https : //skydrive.live.com/#cid=F2DAB940147490B0&id=F2DAB940147490B0%21140

Any ideas what's wrong?任何想法有什么问题？

Thanks谢谢

Update: Here's the view: @{ ViewBag.Title = "TestMVCProject";更新：这是视图：@{ ViewBag.Title = "TestMVCProject"; Layout = null;布局 = 空； } }

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>TestMVCProject</title>
    <link rel="Stylesheet" type="text/css" href="../../Content/ActiveSite.css" />    
    <link href="../../Content/themes/TestMVCProject/jquery-ui-1.9.1.custom.min.css" rel="stylesheet" type="text/css" />
    <script src="../../Scripts/jquery-1.8.2.js" type="text/javascript"></script>
    <script src="../../Scripts/jquery-ui-1.9.1.custom.js" type="text/javascript"></script>
</head>

<body>
<div class="container">
  <div class="header">  
  <div id="loginimagecontainer">
  @using (Html.BeginForm("LoginActions", "Account", FormMethod.Post, new { @id = "LoginActionsForm" }))
  {  
  @Html.AntiForgeryToken()      
  <a href="#"><img src="/images/icons/message-icon.png" width="60" height="60" alt="Messages" title="Messages"/></a>
  <a href="/Account/LogOff"><img src="/images/icons/log-out-icon.png" width="60" height="60" alt="Log off" title="Log off"/></a>
  }    
  </div>

  <div class="logotext"><img alt="TestMVCProject Logo" src="#" width="350" height="150" id="TestMVCProjectLogo" /></div>
    </div>    
  <div class="content profile">  
    <div id="leftPane">
        <img src="#" alt="Placeholder" width="165" height="200" id="ProfilePhoto" title="Profile Photo" />
        <div id="Username"></div>
        <div id="NavLinks">
            <div class="ProfileNavigation" onclick="Navigate('/Profile/Update')"><span>Profile</span><img src="/images/icons/edit-icon.png" width="30" height="30" alt="Profile" /></div>
            <div class="ProfileNavigation"><span>Search</span><img src="/images/icons/search-icon.png" width="30" height="30" alt="Search" /></div>
            <div class="ProfileNavigation" onclick="Navigate('/Photo')"><span>Photos</span><img src="/images/icons/camera-icon.png" width="30" height="30" alt="Photos"/></div>
        </div>
    </div>
      <div id="adcontainer">
        <h4>Ads go here</h4>
        <p>content goes here</p>    
        </div>

    <div id="centerPane">
    @RenderBody()
    </div>     

  </div>
  @RenderPage("~/Views/Shared/_Footer.cshtml")
    <div id="redirectiondialog" class="dialog">
    <br />
    Hey, wait up... we're redirecting you over to the login page
    <br />
    </div> 

    <script type="text/javascript">    
        function Navigate(url) {
            window.location = url;
            return false;
        }
    </script>
</div>
</body>
</html>

and here's the footer page:这是页脚页面：

 <div class="footer">
    <div class="fltrt">Copyright 2012 TestMVCProject Inc&nbsp;</div>
    <p><a href="/Profile/Test">About</a> | <a href="#">Contact</a> | <a href="#">FAQ</a> | <a href="#">Advertise</a> | <a href="#">Support</a> | <a href="#">Feedback</a> | <a href="#">Login</a> | <a href="#">Register</a> | <a href="#">Privacy</a> | <a href="#">Terms</a></p>    
</div>

Update: @Tieson T: Thanks, I changed this to be Html.Partial instead of RenderPage.更新：@Tieson T：谢谢，我将其更改为 Html.Partial 而不是 RenderPage。 However the problem still persists as the action method still gets called twice... (Editing description as I don't have privileges to add comments)但是问题仍然存在，因为操作方法仍然被调用两次......（编辑描述，因为我没有添加评论的权限）

6 个解决方案

解决方案1
 10 已采纳  2012-12-27 17:48:11

I figured out the problem.我解决了这个问题。 There was this line in the code:代码中有这一行：

<img alt="TestMVCProject Logo" src="#" width="350" height="150" id="TestMVCProjectLogo" />

The src was going back to the same page. src返回到同一页面。 Once I replace it with a "" it works fine now.一旦我用""替换它，它现在就可以正常工作了。

解决方案2
 3  2013-12-27 07:03:41

I also faced same problem.我也面临同样的问题。 The Action was rendering twice. Action 渲染了两次。 The only problem was with唯一的问题是

<img id="blah" src="#" alt="your image" />

Dont know for what reason src attribute of image was causing to perform rendering twice on page.不知道图像的 src 属性是什么原因导致在页面上执行两次渲染。

I just changed it to ""`我只是将其更改为“”`

<img id="blah" src="" alt="your image" />

and it is working fine now.现在工作正常。

解决方案3
 1  2012-12-25 04:50:12

Since your _Footer.cshtml view is just plain old HTML, there is absolutely no reason to call @RenderPage() to insert it into your layout.由于您的_Footer.cshtml视图只是普通的旧 HTML，因此绝对没有理由调用@RenderPage()将其插入到您的布局中。 Use @Html.Partial() instead:使用@Html.Partial()代替：

@Html.Partial("_Footer")

I honestly don't know for sure why the layout is called twice, but I assume @RenderPage() (which I've never had a need for) renders an entire HTML page and injects the results.老实说，我不确定为什么布局会被调用两次，但我假设@RenderPage() （我从来不需要）呈现整个 HTML 页面并注入结果。 You'd have to check the page source in your browser to confirm.您必须在浏览器中检查页面源以进行确认。

HTH.哈。

解决方案4
 1  2017-08-19 14:42:15

@Url.Content(...) is causing the model to get called twice for me. @Url.Content(...) 导致模型被我调用两次。 Maybe some others issue as well也许其他一些问题也是如此

解决方案5
 0  2020-03-05 09:08:00

当我们提供图像路径时也会发生这种情况，但是该路径上不存在图像。

解决方案6
 0  2020-09-11 01:09:06

guy's if none of the above works like me, try disabling Conveyor extension.如果以上都不像我，请尝试禁用传送带扩展。

that mas my nightmare.那是我的噩梦。

enjoy...请享用...

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