Cannot access embedded resource in ASP.NET Core C# project?

Question

I am trying to set a stream equal to the text content of an embedded resource in my ASP.NET Core project. However, when debugging, the stream is continuously being set to null, and I assume that this is because of the fact that it cannot find this embedded resource to begin with.

I have set the file as an embedded resource by going to Properties > Build Action > Embedded Resource. And then I have also edited the projects .csproj file to include an item group which references the file to include:

<ItemGroup>
  <EmbeddedResource Include="Assets/loyalty-template.html">
    <LogicalName>Assets/Loyalty-template.html</LogicalName>
  </EmbeddedResource>
</ItemGroup>

Where I set the stream:

string body;
using (var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Assets/loyalty-template.html"))
   {
       TextReader tr = new StreamReader(stream);
       body = tr.ReadToEnd();
   }

Am I referencing the embedded file correctly in the GetManifestResourceStream? Below is the file structure of my project where loyalty-template.html is situated:

Call GetManifestResourceNames to find out if the resource is there and under what name. — Wiktor Zychla
– Wiktor Zychla, Commented Oct 10, 2021 at 12:27
Isn't it much easier to just set the file as copy to output directory and then File.ReadAllText(Path.Combine("Assets", "loyalty-template.html"));? — Camilo Terevinto
– Camilo Terevinto, Commented Oct 10, 2021 at 12:28
It should be {ProjectDefaultNamespace}.Assets.{filename}, i.e. namespace + dot separated path — Ivan Stoev
– Ivan Stoev, Commented Oct 10, 2021 at 12:42

Albert Takács · Accepted Answer · 2021-10-10 15:15:19Z

5

Use the following path: [assembly name].[directory].[file name].

OR

Use GetManifestResourceNames with the file name and extension only:

string resourceName = assembly.GetManifestResourceNames()
.Single(str => str.EndsWith("loyalty-template.html"));

edited Oct 10, 2021 at 15:15

answered Oct 10, 2021 at 13:15

Albert Takács

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5 Comments

SeventhWarhawk Over a year ago

I have attempted this. However it still cannot find the resource?

var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("The-Food-Works-WebAPI.Assets.loyalty-template.html")

Albert Takács Over a year ago

This seems to be a fine path. Should be working.

Albert Takács Over a year ago

Have you tried the following? string resourceName = assembly.GetManifestResourceNames().Single(str => str.EndsWith("loyalty-template.html"));

SeventhWarhawk Over a year ago

Thank you so much. This did the trick. Please update your answer with this comment and ill upvote it!

Albert Takács Over a year ago

Thank you @SeventhWarhawk for the upvote! My pleasure to help ;)

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