asp.net-mvc – 如何在MVC3中的局部视图中渲染节？

在MVC3项目中，我有一个带有此代码的“_Layout.vbhtml”文件

<!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，我在共享文件夹中有一个部分视图“ValidationScripts.vbhtml”

@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

如果我从这样的视图中调用部分视图…

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

@Html.Partial("ValidationScripts")

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

部分“脚本”不在页面上呈现，输出HTML是

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

  </body>
</html>

如何在局部视图中渲染剖面？

解决方法

我在重复的脚本之上有同样的问题，所以我创建了几个Extension方法：

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());
  }
}

在任何视图或部分视图或显示/编辑模板上，您只需添加所需内容：

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

在您的布局中，您可以将其渲染到您想要的位置：

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

您可能遇到的唯一问题是如果复杂化，脚本的呈现顺序。如果这成为一个问题，只需将脚本添加到视图/模板的底部，然后在呈现它们之前简单地颠倒扩展方法中的顺序。

asp.net-mvc – 如何在MVC3中的局部视图中渲染节？

解决方法

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