CODEWITHSUNDEEP
c#
Stu Stephenson
Stu Stephenson

Reputation: 153

Is it possible to send a function to another function with the same return type but different parameters?

I have an AttachmentService.cs class that is currently used to upload images to a database and/or a cloud storage container. When uploading to the cloud I have some retry logic in place that I would like to reuse when being called by two separate methods. I would like to pass in each function as a parameter and then call them from within the method they have been passed into. Here are the two signatures I have currently:

C#

//Example: I want to be able to pass the first function and also the second
//I'm sure it can done with generics but can't seem to get it currently
private AttachmentUploadResult UploadAttachmentToGLS(Func<string, Guid, byte?[], string, AttachmentUploadResult> uploadFunction)
private AttachmentUploadResult UploadAttachmentToGLS(Func<AttachmentEntity, AttachmentUploadResult> uploadFunction)

I would like the above code to only have one signature that could take either

Func<string, Guid, byte?[], string, AttachmentUploadResult> uploadFunction or Func<AttachmentEntity, AttachmentUploadResult> uploadFunction so that my method could look like something like this:

private AttachmentUploadResult UploadAttachmentToGLS(Func<parameters, AttachmentUploadResult>uploadFunction)
{
    //Some retry logic
    uploadFunction(parameters);
    //Some more retry logic
}

Is there a way in which I can acheive the above? I have read into Func and do not believe this is the correct delegate to use.

Upvotes: 1

Views: 128

Answers (1)

Luaan
Luaan

Reputation: 63732

The signature of your function can be just Func<AttachmentUploadResult> - you don't really care about the parameters in the UploadAttachment method, so you should close over them. The call might then look something like this:

Upload(() => SomeUploadMethod(theActual, parameters, toTheMethod));

It also allows you to hide the details of the implementation from the UploadAttachment method - all you care about is "this is the function to call when I want to do the upload".

Upvotes: 2

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