如何呈现在MVC3局部视图一节？ | 如何呈现在MVC3局部视图一节

本文介绍了如何呈现在MVC3局部视图一节？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在一个MVC3项目，我有这个code一个_Layout.vbhtml文件

In a MVC3 project, I have a "_Layout.vbhtml" file with this code

<!DOCTYPE html>
<html>
  <head>
  </head>
  <body>
    ...
    <script src="@Url.Content("~/Scripts/jquery-1.8.2.min.js")"></script>
    @RenderSection("Scripts", false)
  </body>
</html>

然后，我有一个局部视图ValidationScripts.vbhtml中的共享文件夹

Then, I have a Partial View "ValidationScripts.vbhtml" in the Shared folder with

@Section Scripts
    <script src="@Url.Content("~/Scripts/jquery.validate.min.js")"></script>
    <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"></script>
    <script src="@Url.Content("~/Scripts/jquery.validate.fix.js")"></script>
    <script src="@Url.Content("~/Scripts/localization/messages_de.js")"></script>
End Section

如果我把从这样的视图的局部视图...

If I call the Partial View from a View like this...

@ModelType MvcExample.MyModel
@Code
    ViewData("Title") = "Test"
End Code

@Html.Partial("ValidationScripts")

<h2>Just a Test</h2>
...

章节脚本不会呈现在页面上，并且输出HTML是

the Section "Scripts" is not rendered on the page, and the output HTML is

<!DOCTYPE html>
<html>
  <head>
  </head>
  <body>
    ...
    <script src="@Url.Content("~/Scripts/jquery-1.8.2.min.js")"></script>

  </body>
</html>

我怎样才能呈现局部视图节？

How can I render the Section in the Partial View ?

推荐答案

我对重复脚本的顶部同样的问题，所以我创建了几个扩展方法：

I had the same issue on top of duplicate scripts, so I created a couple of Extension methods:

public static class HtmlHelperExtensions
{
  private const string _jSViewDataName = "RenderJavaScript";
  private const string _styleViewDataName = "RenderStyle";

  public static void AddJavaScript(this HtmlHelper htmlHelper,
                                   string scriptURL)
  {
    List<string> scriptList = htmlHelper.ViewContext.HttpContext
      .Items[HtmlHelperExtensions._jSViewDataName] as List<string>;
    if (scriptList != null)
    {
      if (!scriptList.Contains(scriptURL))
      {
        scriptList.Add(scriptURL);
      }
    }
    else
    {
      scriptList = new List<string>();
      scriptList.Add(scriptURL);
      htmlHelper.ViewContext.HttpContext
        .Items.Add(HtmlHelperExtensions._jSViewDataName, scriptList);
    }
  }

  public static MvcHtmlString RenderJavaScripts(this HtmlHelper HtmlHelper)
  {
    StringBuilder result = new StringBuilder();

    List<string> scriptList = HtmlHelper.ViewContext.HttpContext
      .Items[HtmlHelperExtensions._jSViewDataName] as List<string>;
    if (scriptList != null)
    {
      foreach (string script in scriptList)
      {
        result.AppendLine(string.Format(
          "<script type=\"text/javascript\" src=\"{0}\"></script>",
          script));
      }
    }

    return MvcHtmlString.Create(result.ToString());
  }

  public static void AddStyle(this HtmlHelper htmlHelper, string styleURL)
  {
    List<string> styleList = htmlHelper.ViewContext.HttpContext
      .Items[HtmlHelperExtensions._styleViewDataName] as List<string>;

   if (styleList != null)
   {
     if (!styleList.Contains(styleURL))
     {
       styleList.Add(styleURL);
     }
   }
   else
   {
     styleList = new List<string>();
     styleList.Add(styleURL);
     htmlHelper.ViewContext.HttpContext
       .Items.Add(HtmlHelperExtensions._styleViewDataName, styleList);
   }
 }

 public static MvcHtmlString RenderStyles(this HtmlHelper htmlHelper)
 {
   StringBuilder result = new StringBuilder();

   List<string> styleList = htmlHelper.ViewContext.HttpContext
     .Items[HtmlHelperExtensions._styleViewDataName] as List<string>;

   if (styleList != null)
   {
     foreach (string script in styleList)
     {
       result.AppendLine(string.Format(
         "<link href=\"{0}\" rel=\"stylesheet\" type=\"text/css\" />",
         script));
     }
   }

  return MvcHtmlString.Create(result.ToString());
  }
}

在任何视图或局部视图或显示/编辑模板只需添加你所需要的：

On any View or Partial View or Display/Edit Template you simply add what you need:

@{
  Html.AddJavaScript("http://cdn.jquerytools.org/1.2.7/full/jquery.tools.min.js");
}

在你的布局你渲染它，你想要的：

In your Layouts you render it where you want it:

<!DOCTYPE html>
<html lang="en">
  <head>
  @Html.RenderStyles()
  @Html.RenderJavascripts()

您可能有唯一的问题是如果您在其中得到复杂脚本的呈现顺序。如果这成为一个问题，只需将脚本添加到你的视图/模板底部，呈现在他们面前根本扭转扩展方法的顺序。

The only issue you may have is the order in which the scripts are rendered if you get to complex. If that becomes an issue, simply add the scripts to the bottom of your views/templates, and simply reverse the order in the extension method before rendering them.

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