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我正在尝试更新 .NET 4.8 上的 ASP.NET MVC 应用程序以使用 Bootstrap 5.1。

我按照以下步骤操作：

  1. 生成 ASP.NET Web 应用程序 (.NET Framework) 应用程序。
  2. 使用 NuGet 包管理器将 Bootstrap 从 3.4.1 版更新到 5.1.3 版
  3. 使用 Add/Client-Side Library / jsdelivr 安装 popperjs/core@2.11.2
  4. 创建一个 ScriptBundle 到 popperjs/core@2.11.2
  5. 更改_Layout.cshtml

BundleConfig班级：

public class BundleConfig
{
    public static void RegisterBundles(BundleCollection bundles)
    {
        .....

        bundles.Add(new ScriptBundle("~/bundles/popperCore").Include(
                    "~/lib/popperjs/core/dist/cjs/popper.min.js"));

        bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
                  "~/Scripts/bootstrap.js"));

        ......
    }
}

旧 _Layout.cshtml：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>@ViewBag.Title - My ASP.NET Application</title>
    @Styles.Render("~/Content/css")
    @Scripts.Render("~/bundles/modernizr")

</head>
<body>
    <div class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                @Html.ActionLink("Application name", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
            </div>
            <div class="navbar-collapse collapse">
                <ul class="nav navbar-nav">
                    <li>@Html.ActionLink("Home", "Index", "Home")</li>
                    <li>@Html.ActionLink("About", "About", "Home")</li>
                    <li>@Html.ActionLink("Contact", "Contact", "Home")</li>
                </ul>
                @Html.Partial("_LoginPartial")
            </div>
        </div>
    </div>
    <div class="container body-content">
        @RenderBody()
        <hr />
        <footer>
            <p>&copy; @DateTime.Now.Year - My ASP.NET Application</p>
        </footer>
    </div>

    @Scripts.Render("~/bundles/jquery")
    @Scripts.Render("~/bundles/bootstrap")
    @RenderSection("scripts", required: false)
</body>
</html>

新 _Layout.cshtml：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>@ViewBag.Title - DosMy ASP.NET Application</title>
    @Styles.Render("~/Content/css")
    @Scripts.Render("~/bundles/modernizr")

</head>
<body>

   <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
        <div class="container">
            @Html.ActionLink("Application name", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>

            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav mr-auto">

                    <li class="nav-item">@Html.ActionLink("Home", "Index", "Home", new { @class = "nav-link" })</li>
                    <li class="nav-item">@Html.ActionLink("About", "About", "Home", new { @class = "nav-link" })</li>
                    <li class="nav-item">@Html.ActionLink("Contact", "Contact", "Home", new { @class = "nav-link" })</li>
                </ul>
            </div>
        </div>
    </nav>

    <div class="container body-content">
        @RenderBody()
        <hr />
        <footer>
            <p>&copy; @DateTime.Now.Year - My ASP.NET Application</p>
        </footer>
    </div>

    @Scripts.Render("~/bundles/popperCore")
    @Scripts.Render("~/bundles/bootstrap")

    @RenderSection("scripts", required: false)
</body>
</html>

使用捆绑包时，我收到以下错误消息：

System.NullReferenceException：对象引用未设置为对象的实例

如果我使用bootstrap.bundle.min.jscdn，它工作正常。

<!DOCTYPE html>
<html>
<head>
    ....
</head>
<body>
    ....

    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>

    @RenderSection("scripts", required: false)
</body>
</html>

如果我使用 popper/core 和 bootstrap.min.js cdn 它不起作用。

<!DOCTYPE html>
<html>
<head>
    ....
</head>
<body>
    ....

       
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js" integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js" integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous"></script>

    @RenderSection("scripts", required: false)
</body>
</html>

我不知道为什么它不适用于捆绑包？以及如何解决这个问题？

4

0 回答 0