asp.net-mvc – 可以使用“Bundle.Include”(在ASP.NET MVC中使

发布时间：2020-12-16 00:25:10 所属栏目：asp.Net 来源：网络整理

导读：如果缺少javascript或css文件，是否有可能收到异常？我已经试过下面的代码，但它永远不会抛出异常… public class BundleConfig { public static void RegisterBundles(BundleCollection bundles) { .... bundles.Add(new ScriptBundle("~/bundles/somethin

如果缺少javascript或css文件，是否有可能收到异常？

我已经试过下面的代码，但它永远不会抛出异常…

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

        bundles.Add(new ScriptBundle("~/bundles/something").Include("~/Scripts/nonExistingFile.js"));
        // I would like the above usage of Include method with 
        // a non-existing file  to throw an exception to make it 
        // obvious that an expected file is missing ...
        // but since it does not I tried to implement a method as below ...
        ...
        AssertThatAllFilesExist(bundles);
        // but unfortunately an exception is never thrown but when 
        // iterating the files in the method below,// the non-existing file seems to never become retrieved ...
    }   

    private static void AssertThatAllFilesExist(BundleCollection bundles) {
        HttpContext currentHttpContext = HttpContext.Current;
        var httpContext = new HttpContextWrapper(currentHttpContext);
        foreach (var bundle in bundles) {
            var bundleContext = new BundleContext(httpContext,bundles,bundle.Path);
            IEnumerable<FileInfo> files = bundle.EnumerateFiles(bundleContext);
            foreach (var file in files) {
                if (!file.Exists) {
                    // if this problem would occur then it should 
                    // indicate that one of the arguments of the 
                    // method "Bundle.Include" does not 
                    // correspond to an existing file ...
                    throw new ArgumentException("The following file does not exist: " + file.FullName);
                }
            }
        }
    }
}

解决方法

我使用这个类而不是ScriptBundle：

public class ScriptBundleWithException : ScriptBundle
{
    public ScriptBundleWithException( string virtualPath ) : base( virtualPath ) {}
    public ScriptBundleWithException( string virtualPath,string cdnPath ) : base( virtualPath,cdnPath ) {}

    public override Bundle Include( params string[] virtualPaths )
    {
        foreach ( var virtualPath in virtualPaths ) {
            Include( virtualPath );
        }
        return this;
    }

    public override Bundle Include( string virtualPath,params IItemTransform[] transforms )
    {
        var realPath = System.Web.Hosting.HostingEnvironment.MapPath( virtualPath );
        if ( !File.Exists( realPath ) ) {
            throw new FileNotFoundException( "Virtual path not found: " + virtualPath );
        }
        return base.Include( virtualPath,transforms );
    }
}

然后在配置中：

bundles.Add( new ScriptBundleWithException( "~/bundles/something" ) //...

（编辑：李大同）

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