从视图或部分视图添加 CSS 或 JavaScript 文件到布局头

布局页面头:

<head>
    <link href="@Url.Content("~/Content/themes/base/Site.css")"
          rel="stylesheet" type="text/css" />
</head>

应用程序需要的 View(AnotherView):

<link href="@Url.Content("~/Content/themes/base/AnotherPage.css")"
      rel="stylesheet" type="text/css" />

和 AnotherView 有一个局部视图(AnotherPartial)需要:

<link href="@Url.Content("~/Content/themes/base/AnotherPartial.css")"
      rel="stylesheet" type="text/css" />

问题:我们如何添加这些 CSS 文件链接AnotherView 和 AnotherPartial 链接到布局头

RenderSection 不是一个好主意,因为 AnotherPage 可以有多个 Partials。添加所有 CSS 到头部是没用的,因为它将动态更改(它取决于 Anotherpages)。

回答(10)

8 years ago

布局:

<html>
    <head>
        <meta charset="utf-8" />
        <title>@ViewBag.Title</title>
        <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
        <script src="@Url.Content("~/Scripts/jquery-1.6.2.min.js")" type="text/javascript"></script>
        <script src="@Url.Content("~/Scripts/modernizr-2.0.6-development-only.js")" type="text/javascript"></script>
        @if (IsSectionDefined("AddToHead"))
        {
            @RenderSection("AddToHead", required: false)
        }

        @RenderSection("AddToHeadAnotherWay", required: false)
    </head>

视图:

@model ProjectsExt.Models.DirectoryObject

@section AddToHead{
    <link href="@Url.Content("~/Content/Upload.css")" rel="stylesheet" type="text/css" />
}

9 years ago

更新https://github.com/speier/mvcassetshelper的基本示例

我们使用以下实现将 JS 和 CSS 文件添加到布局页面中。

查看或部分查看:

@{
    Html.Assets().Styles.Add("/Dashboard/Content/Dashboard.css");
    Html.Assets().Scripts.Add("/Dashboard/Scripts/Dashboard.js");
}

布局页面:

<head>
    @Html.Assets().Styles.Render()
</head>

<body>
    ...
    @Html.Assets().Scripts.Render()
</body>

HtmlHelper 扩展:

public static class HtmlHelperExtensions
{
    public static AssetsHelper Assets(this HtmlHelper htmlHelper)
    {
        return AssetsHelper.GetInstance(htmlHelper);
    }    
}

public class AssetsHelper 
{
    public static AssetsHelper GetInstance(HtmlHelper htmlHelper)
    {
        var instanceKey = "AssetsHelperInstance";

        var context = htmlHelper.ViewContext.HttpContext;
        if (context == null) return null;

        var assetsHelper = (AssetsHelper)context.Items[instanceKey];

        if (assetsHelper == null)
            context.Items.Add(instanceKey, assetsHelper = new AssetsHelper());

        return assetsHelper;
    }

    public ItemRegistrar Styles { get; private set; }
    public ItemRegistrar Scripts { get; private set; }

    public AssetsHelper()
    {
        Styles = new ItemRegistrar(ItemRegistrarFormatters.StyleFormat);
        Scripts = new ItemRegistrar(ItemRegistrarFormatters.ScriptFormat);
    }
}

public class ItemRegistrar
{
    private readonly string _format;
    private readonly IList<string> _items;

    public ItemRegistrar(string format)
    {
        _format = format;
        _items = new List<string>();
    }

    public ItemRegistrar Add(string url)
    {
        if (!_items.Contains(url))
            _items.Add(url);

        return this;
    }

    public IHtmlString Render()
    {
        var sb = new StringBuilder();

        foreach (var item in _items)
        {
            var fmt = string.Format(_format, item);
            sb.AppendLine(fmt);
        }

        return new HtmlString(sb.ToString());
    }
}

public class ItemRegistrarFormatters
{
    public const string StyleFormat = "<link href=\"{0}\" rel=\"stylesheet\" type=\"text/css\" />";
    public const string ScriptFormat = "<script src=\"{0}\" type=\"text/javascript\"></script>";
}

6 years ago

遗憾的是,默认情况下,这不可能像其他用户建议的那样使用section,因为section仅适用于Viewchild

然而,有效的是在每个视图中实现和重新定义部分,意思是:

section Head
{
    @RenderSection("Head", false)
}

这样每个视图都可以实现头部,而不仅仅是直接的孩子。这只能部分起作用,尤其是多个部分故障开始(正如你在问题中提到的那样)。

因此,问题的唯一真正解决方案是使用ViewBag。最好的可能是 CSS 和脚本的单独集合(列表)。为此,您需要确保在执行任何视图之前初始化List used。然后,您可以在每个 view/partial 的顶部执行此类操作(如果ScriptsStyles值为 null,则无需关心:

ViewBag.Scripts.Add("myscript.js");
ViewBag.Styles.Add("mystyle.css");

在布局中,您可以遍历集合并根据List中的值添加样式。

@foreach (var script in ViewBag.Scripts)
{
    <script type="text/javascript" src="@script"></script>
}
@foreach (var style in ViewBag.Styles)
{
    <link href="@style" rel="stylesheet" type="text/css" />
}

我觉得它很难看,但它是唯一可行的。

****UPDATE**因为它首先开始执行内部视图并且正在逐步实现布局并且 CSS 样式是级联的,所以通过ViewBag.Styles.Reverse()反转样式列表可能是有意义的。

这样就可以首先添加最外层的样式,这与 CSS 样式表的工作方式无关。

4 years ago

您可以在布局中通过 RenderSection 方法定义节。

布局

<head>
  <link href="@Url.Content("~/Content/themes/base/Site.css")"
    rel="stylesheet" type="text/css" />
  @RenderSection("heads", required: false)
</head>

然后,您可以将 css 文件包含在视图中的区域区域除了局部视图

该部分在视图中工作,但不能在部分视图中按设计工作

<!--your code -->
@section heads
{
  <link href="@Url.Content("~/Content/themes/base/AnotherPage.css")"
  rel="stylesheet" type="text/css" />
}

如果您确实想在局部视图中使用剖面区域,可以按照文章重新定义 RenderSection 方法。

剃刀,嵌套布局和重新定义的部分 - Marcin On ASP.NET

9 years ago

我试图解决这个问题。

我的回答在这里。

“DynamicHeader” - http://dynamicheader.codeplex.com/https://nuget.org/packages/DynamicHeader

例如,_Layout.cshtml 是:

<head>
@Html.DynamicHeader()
</head>
...

并且,您可以在任何地方将.js 和.css 文件注册到“DynamicHeader”

例如,AnotherPartial.cshtm 中的代码块是:

@{
  DynamicHeader.AddSyleSheet("~/Content/themes/base/AnotherPartial.css");
  DynamicHeader.AddScript("~/some/myscript.js");
}

然后,最终输出 HTML 是:

<html>
  <link href="/myapp/Content/themes/base/AnotherPartial.css" .../>
  <script src="/myapp/some/myscript.js" ...></script>
</html>
...

8 years ago

我有一个类似的问题,最后用下面的代码应用卡尔曼的优秀答案(不是很整洁,但可以说更可扩展):

namespace MvcHtmlHelpers
{
    //http://stackoverflow.com/questions/5110028/add-css-or-js-files-to-layout-head-from-views-or-partial-views#5148224
    public static partial class HtmlExtensions
    {
        public static AssetsHelper Assets(this HtmlHelper htmlHelper)
        {
            return AssetsHelper.GetInstance(htmlHelper);
        }
    }
    public enum BrowserType { Ie6=1,Ie7=2,Ie8=4,IeLegacy=7,W3cCompliant=8,All=15}
    public class AssetsHelper
    {
        public static AssetsHelper GetInstance(HtmlHelper htmlHelper)
        {
            var instanceKey = "AssetsHelperInstance";
            var context = htmlHelper.ViewContext.HttpContext;
            if (context == null) {return null;}
            var assetsHelper = (AssetsHelper)context.Items[instanceKey];
            if (assetsHelper == null){context.Items.Add(instanceKey, assetsHelper = new AssetsHelper(htmlHelper));}
            return assetsHelper;
        }
        private readonly List<string> _styleRefs = new List<string>();
        public AssetsHelper AddStyle(string stylesheet)
        {
            _styleRefs.Add(stylesheet);
            return this;
        }
        private readonly List<string> _scriptRefs = new List<string>();
        public AssetsHelper AddScript(string scriptfile)
        {
            _scriptRefs.Add(scriptfile);
            return this;
        }
        public IHtmlString RenderStyles()
        {
            ItemRegistrar styles = new ItemRegistrar(ItemRegistrarFormatters.StyleFormat,_urlHelper);
            styles.Add(Libraries.UsedStyles());
            styles.Add(_styleRefs);
            return styles.Render();
        }
        public IHtmlString RenderScripts()
        {
            ItemRegistrar scripts = new ItemRegistrar(ItemRegistrarFormatters.ScriptFormat, _urlHelper);
            scripts.Add(Libraries.UsedScripts());
            scripts.Add(_scriptRefs);
            return scripts.Render();
        }
        public LibraryRegistrar Libraries { get; private set; }
        private UrlHelper _urlHelper;
        public AssetsHelper(HtmlHelper htmlHelper)
        {
            _urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
            Libraries = new LibraryRegistrar();
        }
    }
    public class LibraryRegistrar
    {
        public class Component
        {
            internal class HtmlReference
            {
                internal string Url { get; set; }
                internal BrowserType ServeTo { get; set; }
            }
            internal List<HtmlReference> Styles { get; private set; }
            internal List<HtmlReference> Scripts { get; private set; }
            internal List<string> RequiredLibraries { get; private set; }

            public Component()
            {
                Styles = new List<HtmlReference>();
                Scripts = new List<HtmlReference>();
                RequiredLibraries = new List<string>();
            }
            public Component Requires(params string[] libraryNames)
            {
                foreach (var lib in libraryNames)
                {
                    if (!RequiredLibraries.Contains(lib))
                        { RequiredLibraries.Add(lib); }
                }
                return this;
            }
            public Component AddStyle(string url, BrowserType serveTo = BrowserType.All)
            {
                Styles.Add(new HtmlReference { Url = url, ServeTo=serveTo });
                return this;
            }
            public Component AddScript(string url, BrowserType serveTo = BrowserType.All)
            {
                Scripts.Add(new HtmlReference { Url = url, ServeTo = serveTo });
                return this;
            }
        }
        private readonly Dictionary<string, Component> _allLibraries = new Dictionary<string, Component>();
        private List<string> _usedLibraries = new List<string>();
        internal IEnumerable<string> UsedScripts()
        {
            SetOrder();
            var returnVal = new List<string>();
            foreach (var key in _usedLibraries)
            {
                returnVal.AddRange(from s in _allLibraries[key].Scripts
                                   where IncludesCurrentBrowser(s.ServeTo)
                                   select s.Url);
            }
            return returnVal;
        }
        internal IEnumerable<string> UsedStyles()
        {
            SetOrder();
            var returnVal = new List<string>();
            foreach (var key in _usedLibraries)
            {
                returnVal.AddRange(from s in _allLibraries[key].Styles
                                   where IncludesCurrentBrowser(s.ServeTo)
                                   select s.Url);
            }
            return returnVal;
        }
        public void Uses(params string[] libraryNames)
        {
            foreach (var name in libraryNames)
            {
                if (!_usedLibraries.Contains(name)){_usedLibraries.Add(name);}
            }
        }
        public bool IsUsing(string libraryName)
        {
            SetOrder();
            return _usedLibraries.Contains(libraryName);
        }
        private List<string> WalkLibraryTree(List<string> libraryNames)
        {
            var returnList = new List<string>(libraryNames);
            int counter = 0;
            foreach (string libraryName in libraryNames)
            {
                WalkLibraryTree(libraryName, ref returnList, ref counter);
            }
            return returnList;
        }
        private void WalkLibraryTree(string libraryName, ref List<string> libBuild, ref int counter)
        {
            if (counter++ > 1000) { throw new System.Exception("Dependancy library appears to be in infinate loop - please check for circular reference"); }
            Component library;
            if (!_allLibraries.TryGetValue(libraryName, out library))
                { throw new KeyNotFoundException("Cannot find a definition for the required style/script library named: " + libraryName); }
            foreach (var childLibraryName in library.RequiredLibraries)
            {
                int childIndex = libBuild.IndexOf(childLibraryName);
                if (childIndex!=-1)
                {
                    //child already exists, so move parent to position before child if it isn't before already
                    int parentIndex = libBuild.LastIndexOf(libraryName);
                    if (parentIndex>childIndex)
                    {
                        libBuild.RemoveAt(parentIndex);
                        libBuild.Insert(childIndex, libraryName);
                    }
                }
                else
                {
                    libBuild.Add(childLibraryName);
                    WalkLibraryTree(childLibraryName, ref libBuild, ref counter);
                }
            }
            return;
        }
        private bool _dependenciesExpanded;
        private void SetOrder()
        {
            if (_dependenciesExpanded){return;}
            _usedLibraries = WalkLibraryTree(_usedLibraries);
            _usedLibraries.Reverse();
            _dependenciesExpanded = true;
        }
        public Component this[string index]
        {
            get
            {
                if (_allLibraries.ContainsKey(index))
                    { return _allLibraries[index]; }
                var newComponent = new Component();
                _allLibraries.Add(index, newComponent);
                return newComponent;
            }
        }
        private BrowserType _requestingBrowser;
        private BrowserType RequestingBrowser
        {
            get
            {
                if (_requestingBrowser == 0)
                {
                    var browser = HttpContext.Current.Request.Browser.Type;
                    if (browser.Length > 2 && browser.Substring(0, 2) == "IE")
                    {
                        switch (browser[2])
                        {
                            case '6':
                                _requestingBrowser = BrowserType.Ie6;
                                break;
                            case '7':
                                _requestingBrowser = BrowserType.Ie7;
                                break;
                            case '8':
                                _requestingBrowser = BrowserType.Ie8;
                                break;
                            default:
                                _requestingBrowser = BrowserType.W3cCompliant;
                                break;
                        }
                    }
                    else
                    {
                        _requestingBrowser = BrowserType.W3cCompliant;
                    }
                }
                return _requestingBrowser;
            }
        }
        private bool IncludesCurrentBrowser(BrowserType browserType)
        {
            if (browserType == BrowserType.All) { return true; }
            return (browserType & RequestingBrowser) != 0;
        }
    }
    public class ItemRegistrar
    {
        private readonly string _format;
        private readonly List<string> _items;
        private readonly UrlHelper _urlHelper;

        public ItemRegistrar(string format, UrlHelper urlHelper)
        {
            _format = format;
            _items = new List<string>();
            _urlHelper = urlHelper;
        }
        internal void Add(IEnumerable<string> urls)
        {
            foreach (string url in urls)
            {
                Add(url);
            }
        }
        public ItemRegistrar Add(string url)
        {
            url = _urlHelper.Content(url);
            if (!_items.Contains(url))
                { _items.Add( url); }
            return this;
        }
        public IHtmlString Render()
        {
            var sb = new StringBuilder();
            foreach (var item in _items)
            {
                var fmt = string.Format(_format, item);
                sb.AppendLine(fmt);
            }
            return new HtmlString(sb.ToString());
        }
    }
    public class ItemRegistrarFormatters
    {
        public const string StyleFormat = "<link href=\"{0}\" rel=\"stylesheet\" type=\"text/css\" />";
        public const string ScriptFormat = "<script src=\"{0}\" type=\"text/javascript\"></script>";
    }
}

该项目包含一个静态 AssignAllResources 方法:

assets.Libraries["jQuery"]
        .AddScript("~/Scripts/jquery-1.10.0.min.js", BrowserType.IeLegacy)
        .AddScript("~/Scripts//jquery-2.0.1.min.js",BrowserType.W3cCompliant);
        /* NOT HOSTED YET - CHECK SOON 
        .AddScript("//ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js",BrowserType.W3cCompliant);
        */
    assets.Libraries["jQueryUI"].Requires("jQuery")
        .AddScript("//ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js",BrowserType.Ie6)
        .AddStyle("//ajax.aspnetcdn.com/ajax/jquery.ui/1.9.2/themes/eggplant/jquery-ui.css",BrowserType.Ie6)
        .AddScript("//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js", ~BrowserType.Ie6)
        .AddStyle("//ajax.aspnetcdn.com/ajax/jquery.ui/1.10.3/themes/eggplant/jquery-ui.css", ~BrowserType.Ie6);
    assets.Libraries["TimePicker"].Requires("jQueryUI")
        .AddScript("~/Scripts/jquery-ui-sliderAccess.min.js")
        .AddScript("~/Scripts/jquery-ui-timepicker-addon-1.3.min.js")
        .AddStyle("~/Content/jQueryUI/jquery-ui-timepicker-addon.css");
    assets.Libraries["Validation"].Requires("jQuery")
        .AddScript("//ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js")
        .AddScript("~/Scripts/jquery.validate.unobtrusive.min.js")
        .AddScript("~/Scripts/mvcfoolproof.unobtrusive.min.js")
        .AddScript("~/Scripts/CustomClientValidation-1.0.0.min.js");
    assets.Libraries["MyUtilityScripts"].Requires("jQuery")
        .AddScript("~/Scripts/GeneralOnLoad-1.0.0.min.js");
    assets.Libraries["FormTools"].Requires("Validation", "MyUtilityScripts");
    assets.Libraries["AjaxFormTools"].Requires("FormTools", "jQueryUI")
        .AddScript("~/Scripts/jquery.unobtrusive-ajax.min.js");
    assets.Libraries["DataTables"].Requires("MyUtilityScripts")
        .AddScript("//ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.4/jquery.dataTables.min.js")
        .AddStyle("//ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.4/css/jquery.dataTables.css")
        .AddStyle("//ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.4/css/jquery.dataTables_themeroller.css");
    assets.Libraries["MvcDataTables"].Requires("DataTables", "jQueryUI")
        .AddScript("~/Scripts/jquery.dataTables.columnFilter.min.js");
    assets.Libraries["DummyData"].Requires("MyUtilityScripts")
        .AddScript("~/Scripts/DummyData.js")
        .AddStyle("~/Content/DummyData.css");

在_layout 页面

@{
    var assets = Html.Assets();
    CurrentResources.AssignAllResources(assets);
    Html.Assets().RenderStyles()
}
</head>
...
    @Html.Assets().RenderScripts()
</body>

并在 partial(s)和观点

Html.Assets().Libraries.Uses("DataTables");
Html.Assets().AddScript("~/Scripts/emailGridUtilities.js");

6 years ago

尝试 out-of-the-box 解决方案(ASP.NET MVC 4 或更高版本):

@{
    var bundle = BundleTable.Bundles.GetRegisteredBundles().First(b => b.Path == "~/js");

    bundle.Include("~/Scripts/myFile.js");
}

6 years ago

对于我们这些使用 ASP.NET MVC 4 的人来说 - 这可能会有所帮助。

首先,我在 App_Start 文件夹中添加了一个 BundleConfig 类。

这是我用来创建它的代码:

using System.Web.Optimization;

public class BundleConfig
{
    public static void RegisterBundles(BundleCollection bundles)
    {
        bundles.Add(new StyleBundle("~/Content/css").Include("~/Content/SiteMaster.css"));
    }
}

其次,我在 Global.asax 文件中注册了 BundleConfig 类:

protected void Application_Start()
{
    BundleConfig.RegisterBundles(BundleTable.Bundles);
}

第三,我在我的 CSS 文件中添加了样式助手:

/* Styles for validation helpers */
.field-validation-error {
    color: red;
    font-weight: bold;
}

.field-validation-valid {
    display: none;
}

input.input-validation-error {
    border: 1px solid #e80c4d;
}

input[type="checkbox"].input-validation-error {
    border: 0 none;
}

.validation-summary-errors {
    color: #e80c4d;
    font-weight: bold;
    font-size: 1.1em;
}

.validation-summary-valid {
    display: none;
}

最后我在任何视图中使用了这种语法:

@Styles.Render("~/Content/css")

6 years ago

这是一个名为暗盒NuGet插件,除此之外,它还提供了在 partials 中引用脚本和样式的功能。

虽然这个插件有许多配置可用,但它非常灵活。以下是引用脚本或样式表文件的最简单方法:

Bundles.Reference("scripts/app");

根据文件

Reference的调用可以出现在页面,布局或局部视图中的任何位置。

path 参数可以是以下之一:

  • 捆绑路径

  • 资产路径 - 引用包含此资产的整个捆绑包

  • 一个 URL

9 years ago

我写了一个简单的包装器,允许您在每个局部视图中动态地将样式和描述注册到 head 标签中。

它基于 DynamicHeader jsakamoto 提出,但它有一些性能改进和调整。

它非常易于使用,而且功能多样。

用法:

@{
    DynamicHeader.AddStyleSheet("/Content/Css/footer.css", ResourceType.Layout);    
    DynamicHeader.AddStyleSheet("/Content/Css/controls.css", ResourceType.Infrastructure);
    DynamicHeader.AddScript("/Content/Js/Controls.js", ResourceType.Infrastructure);
    DynamicHeader.AddStyleSheet("/Content/Css/homepage.css");    
}

你可以在里面找到完整的代码,解释和例子:动态添加样式和脚本到标记