Why is NSBundle.MainBundle.GetUrlForResource returning null

问题

I am using UIWebView to view a local HTML file. My file is named NoWiFi.html and has the following path Resources/NoWiFi.html. I have also set the Build Action to BundleResource, and tried:

string name = "Resources/NoWiFI.html"
NSURl url;

url = new NSUrl(Path.Combine(NSBundle.MainBundle.BundlePath, name), false);
// and
url = NSBundle.MainBundle.GetUrlForResource("NoWiFi", "html"); // returns null 

webView.LoadRequest(new NSUrlRequest(url));

as in the xamarins documentation but then i get an error: The requested URL was not found on this server

Why does not my code find the file?

回答1:

Because you load local html file .So you should use

webView.LoadRequest(new NSUrlRequest(url),false);

isDir：A Boolean value that specifies whether path is treated as a directory path when resolving against relative path components. Pass True if the path indicates a directory, False otherwise.

回答2:

For some wired reason my problem solved it self once i renamed the file, if anyone else is tying to load a local HTML file my code looks like this:

NSUrl url = NSBundle.MainBundle.GetUrlForResource("NoWiFi", "html");
webView.LoadRequest(new NSUrlRequest(url));

And if your url object is null when you are inspecting it with the debugger make sure the local file (in my case NoWiFi.html) has Build Action set to: BundleResource and if the NSUrl object is still null, try renaming the file

来源：https://stackoverflow.com/questions/57093070/why-is-nsbundle-mainbundle-geturlforresource-returning-null