MVC4 StyleBundle不会以正确的顺序呈现包

Question

我正在尝试渲染一组css文件,但输出顺序错误.我已经尝试过解决方案@ MVC4 Beta Minification and Bundling:在浏览器中订购文件和调试,但它没有帮助.这是捆绑:

bundles.Add(new StyleBundle("~/stylesheet")
    .Include("~/css/main.css")
    .Include("~/css/mvc.css")
    .Include("~/js/jquery.thickbox.css")
    .Include("~/js/jquery.rating.css")
    .Include("~/css/ProductListing.css")
    .Include("~/css/dropdown/dropdown.css")
    .Include("~/css/dropdown/dropdown.vertical.css")
    .Include("~/js/fancybox/jquery.fancybox-1.3.1.css")
    .Include("~/css/scartpopup.css")
    .Include("~/css/ShoppingCart.css")
    .Include("~/css/ceebox.css")
    .Include("~/css/tooltip.css")
    .Include("~/css/recent_blog_posts.css")
    .Include("~/css/ProductDetail.css")
    .Include("~/css/jquery-ui-1.7.3.custom.css")
    .Include("~/css/filter_box.css")
    .Include("~/css/custom_page.css")
    .Include("~/css/Checkout.css")
    .Include("~/css/CheckoutButton.css")
);

这是结果,你可以看到jquery-ui到顶部.

<link href="/css/jquery-ui-1.7.3.custom.css" rel="stylesheet"/>
<link href="/css/main.css" rel="stylesheet"/>
<link href="/css/mvc.css" rel="stylesheet"/>
<link href="/js/jquery.thickbox.css" rel="stylesheet"/>
<link href="/js/jquery.rating.css" rel="stylesheet"/>
<link href="/css/ProductListing.css" rel="stylesheet"/>
<link href="/css/dropdown/dropdown.css" rel="stylesheet"/>
<link href="/css/dropdown/dropdown.vertical.css" rel="stylesheet"/>
<link href="/js/fancybox/jquery.fancybox-1.3.1.css" rel="stylesheet"/>
<link href="/css/scartpopup.css" rel="stylesheet"/>
<link href="/css/ShoppingCart.css" rel="stylesheet"/>
<link href="/css/ceebox.css" rel="stylesheet"/>
<link href="/css/tooltip.css" rel="stylesheet"/>
<link href="/css/recent_blog_posts.css" rel="stylesheet"/>
<link href="/css/ProductDetail.css" rel="stylesheet"/>
<link href="/css/filter_box.css" rel="stylesheet"/>
<link href="/css/custom_page.css" rel="stylesheet"/>
<link href="/css/Checkout.css" rel="stylesheet"/>
<link href="/css/CheckoutButton.css" rel="stylesheet"/>

如何确保样式表按正确顺序呈现？

Answer 1

捆绑不应该以完全相同的顺序呈现CSS文件,它遵循不同的逻辑.如果需要按定义渲染它们,则应创建自定义IBundleOrderer并将其设置为捆绑包作为所需的Orderer:

public class AsDefinedBundleOrderer : IBundleOrderer
{
    public IEnumerable<FileInfo> OrderFiles(BundleContext context, IEnumerable<FileInfo> files)
    {
        return files;
    }
}

和

var bundle = new StyleBundle("~/stylesheet");
bundle.Orderer = new AsDefinedBundleOrderer();
bundles.Add(bundle);

然后这将对列表不起作用,因此Render将以相同的顺序呈现它们.

更新默认排序

捆绑使用概念IBundleOrderer来对a中的项进行排序Bundle.该Bundle班有它的Orderer属性,它看起来是这样的:

public IBundleOrderer Orderer
{
  get
  {
    if (this._orderer == null)
      return (IBundleOrderer) DefaultBundleOrderer.Instance;
    else
      return this._orderer;
  }
  set
  {
    this._orderer = value;
    this.InvalidateCacheEntries();
  }
}

因此,默认订货人实际上是一个,DefaultBundleOrderer直到您使用自定义订货人覆盖它.

将IBundleOrderer具有以下特征:

public interface IBundleOrderer
{
  IEnumerable<FileInfo> OrderFiles(BundleContext context, IEnumerable<FileInfo> files);
}

在DefaultBundleOrderer这个由执行的命令的文件BundleContext,这里是从执行一个片段OrderFiles:

  foreach (BundleFileSetOrdering ordering in (IEnumerable<BundleFileSetOrdering>) context.BundleCollection.FileSetOrderList)
    DefaultBundleOrderer.AddOrderingFiles(ordering, (IEnumerable<FileInfo>) list, fileMap, foundFiles, result);

因此,不同的结果发生了.这当然不是随机排序算法:)规则在BUndleCollection类中定义:

public static void AddDefaultFileOrderings(IList<BundleFileSetOrdering> list)
{
  if (list == null)
    throw new ArgumentNullException("list");
  BundleFileSetOrdering bundleFileSetOrdering1 = new BundleFileSetOrdering("css");
  bundleFileSetOrdering1.Files.Add("reset.css");
  bundleFileSetOrdering1.Files.Add("normalize.css");
  list.Add(bundleFileSetOrdering1);
  BundleFileSetOrdering bundleFileSetOrdering2 = new BundleFileSetOrdering("jquery");
  bundleFileSetOrdering2.Files.Add("jquery.js");
  bundleFileSetOrdering2.Files.Add("jquery-min.js");
  bundleFileSetOrdering2.Files.Add("jquery-*");
  bundleFileSetOrdering2.Files.Add("jquery-ui*");
  bundleFileSetOrdering2.Files.Add("jquery.ui*");
  bundleFileSetOrdering2.Files.Add("jquery.unobtrusive*");
  bundleFileSetOrdering2.Files.Add("jquery.validate*");
  list.Add(bundleFileSetOrdering2);
  BundleFileSetOrdering bundleFileSetOrdering3 = new BundleFileSetOrdering("modernizr");
  bundleFileSetOrdering3.Files.Add("modernizr-*");
  list.Add(bundleFileSetOrdering3);
  BundleFileSetOrdering bundleFileSetOrdering4 = new BundleFileSetOrdering("dojo");
  bundleFileSetOrdering4.Files.Add("dojo.*");
  list.Add(bundleFileSetOrdering4);
  BundleFileSetOrdering bundleFileSetOrdering5 = new BundleFileSetOrdering("moo");
  bundleFileSetOrdering5.Files.Add("mootools-core*");
  bundleFileSetOrdering5.Files.Add("mootools-*");
  list.Add(bundleFileSetOrdering5);
  BundleFileSetOrdering bundleFileSetOrdering6 = new BundleFileSetOrdering("prototype");
  bundleFileSetOrdering6.Files.Add("prototype.js");
  bundleFileSetOrdering6.Files.Add("prototype-*");
  bundleFileSetOrdering6.Files.Add("scriptaculous-*");
  list.Add(bundleFileSetOrdering6);
  BundleFileSetOrdering bundleFileSetOrdering7 = new BundleFileSetOrdering("ext");
  bundleFileSetOrdering7.Files.Add("ext.js");
  bundleFileSetOrdering7.Files.Add("ext-*");
  list.Add(bundleFileSetOrdering7);
}

所以当你从Application_Start以下地方打电话时:

BundleConfig.RegisterBundles(BundleTable.Bundles);

实际上,您传递BundleCollection了库中定义的默认值.

所以我们将BundleFileSetOrdering实例一个接一个地传递到:

private static void AddOrderingFiles(BundleFileSetOrdering ordering, IEnumerable<FileInfo> files, Dictionary<string, HashSet<FileInfo>> fileMap, HashSet<FileInfo> foundFiles, List<FileInfo> result)
{
  foreach (string key in (IEnumerable<string>) ordering.Files)
  {
    if (key.EndsWith("*", StringComparison.OrdinalIgnoreCase))
    {
      string str = key.Substring(0, key.Length - 1);
      foreach (FileInfo fileInfo in files)
      {
        if (!foundFiles.Contains(fileInfo) && fileInfo.Name.StartsWith(str, StringComparison.OrdinalIgnoreCase))
        {
          result.Add(fileInfo);
          foundFiles.Add(fileInfo);
        }
      }
    }
    else if (fileMap.ContainsKey(key))
    {
      List<FileInfo> list = new List<FileInfo>((IEnumerable<FileInfo>) fileMap[key]);
      list.Sort((IComparer<FileInfo>) FileInfoComparer.Instance);
      foreach (FileInfo fileInfo in list)
      {
        if (!foundFiles.Contains(fileInfo))
        {
          result.Add(fileInfo);
          foundFiles.Add(fileInfo);
        }
      }
    }
  }
}

结论

如果我们想要简化过程,我们可以说库更喜欢某种文件,如果找到多种可能性,则对其他文件进行一些排序.这是大多数时候的预期行为,但是你可以看到它很容易被覆盖,AsDefinedBundleOrderer所以它对给定的文件集没有任何作用,因此顺序仍然是原始的.