asp.net-mvc – Asp.Net MVC捆绑,最好的方式来检测丢失的文件

public static class BundleHelper
{
    [Conditional("DEBUG")] // remove this attribute to validate bundles in production too
    private static void CheckExistence(string virtualPath)
    {
        int i = virtualPath.LastIndexOf('/');
        string path = HostingEnvironment.MapPath(virtualPath.Substring(0,i));
        string fileName = virtualPath.Substring(i + 1);

        bool found = Directory.Exists(path);

        if (found)
        {
            if (fileName.Contains("{version}"))
            {
                var re = new Regex(fileName.Replace(".",@".").Replace("{version}",@"(d+(?:.d+){1,3})"));
                fileName = fileName.Replace("{version}","*");
                found = Directory.EnumerateFiles(path,fileName).Where(file => re.IsMatch(file)).FirstOrDefault() != null;
            }
            else // fileName may contain '*'
                found = Directory.EnumerateFiles(path,fileName).FirstOrDefault() != null;
        }

        if (!found)
            throw new ApplicationException(String.Format("Bundle resource '{0}' not found",virtualPath));
    }

    public static Bundle IncludeExisting(this Bundle bundle,params string[] virtualPaths)
    {
        foreach (string virtualPath in virtualPaths)
            CheckExistence(virtualPath);

        return bundle.Include(virtualPaths);
    }

    public static Bundle IncludeExisting(this Bundle bundle,string virtualPath,params IItemTransform[] transforms)
    {
        CheckExistence(virtualPath);
        return bundle.Include(virtualPath,transforms);
    }
}

这样你就不必明确地调用你的帮助方法PreCheck().它还支持ASP.NET的通配符{version}和*：

bundles.Add(new ScriptBundle("~/test")
    .IncludeExisting("~/Scripts/jquery/jquery-{version}.js")
    .IncludeExisting("~/Scripts/lib*")
    .IncludeExisting("~/Scripts/model.js")
    );