捆绑包使用IItemTransform 的集合转换每个文件并连接结果。然后它使用IBundleTransform 的集合转换结果。
默认脚本包通过使用JsMinify（实现IBundleTransform）来缩小完整的包内容。
因此，为了防止某些文件缩小，您必须创建自己的 IBundleBuilder，它使用 IItemTransform 逐个文件缩小捆绑文件。
public class CustomScriptBundle : Bundle
{
public CustomScriptBundle(string virtualPath)
: this(virtualPath, null)
{
}
public CustomScriptBundle(string virtualPath, string cdnPath)
: base(virtualPath, cdnPath, null)
{
this.ConcatenationToken = ";" + Environment.NewLine;
this.Builder = new CustomBundleBuilder();
}
}
public class CustomBundleBuilder : IBundleBuilder
{
internal static string ConvertToAppRelativePath(string appPath, string fullName)
{
return (string.IsNullOrEmpty(appPath) || !fullName.StartsWith(appPath, StringComparison.OrdinalIgnoreCase) ? fullName : fullName.Replace(appPath, "~/")).Replace('\\', '/');
}
public string BuildBundleContent(Bundle bundle, BundleContext context, IEnumerable<BundleFile> files)
{
if (files == null)
return string.Empty;
if (context == null)
throw new ArgumentNullException("context");
if (bundle == null)
throw new ArgumentNullException("bundle");
StringBuilder stringBuilder = new StringBuilder();
foreach (BundleFile bundleFile in files)
{
bundleFile.Transforms.Add(new CustomJsMinify());
stringBuilder.Append(bundleFile.ApplyTransforms());
stringBuilder.Append(bundle.ConcatenationToken);
}
return stringBuilder.ToString();
}
}
public class CustomJsMinify : IItemTransform
{
public string Process(string includedVirtualPath, string input)
{
if (includedVirtualPath.EndsWith("min.js", StringComparison.OrdinalIgnoreCase))
{
return input;
}
Minifier minifier = new Minifier();
var codeSettings = new CodeSettings();
codeSettings.EvalTreatment = EvalTreatment.MakeImmediateSafe;
codeSettings.PreserveImportantComments = false;
string str = minifier.MinifyJavaScript(input, codeSettings);
if (minifier.ErrorList.Count > 0)
return "/* " + string.Concat(minifier.Errors) + " */";
return str;
}
}
然后使用CustomScriptBundle 而不是ScriptBundle
public static void RegisterBundles(BundleCollection bundles)
{
bundles.Add(new CustomScriptBundle("~/bundles/Sample").Include(
"~/Scripts/a.js",
"~/Scripts/b.js",
"~/Scripts/c.js"));
}
如果您提供min.js 文件，它将被使用而不是缩小它。