CODEWITHSUNDEEP
asp.net-mvc
dp.
dp.

Reputation: 8308

Pass HttpPostedFileBase as an Argument

I have an application that allows users to upload word and pdf documents. I also have a class in my model that gathers some metadata about the file (i.e., file size, content type, etc.).

I want to centralize some of the "save" functionality (both saving the metadata to the database, and saving the actual file to the server). I would like to pass the HttpPostedFileBase to my Service layer that will then use the built-in .SaveAs(filename) functionality. However, I can't seem to figure out how to pass the file type to another method. I've tried the below:

public ActionResult Index(HttpPostedFileBase uploadedDocument)
{
    string fileName = "asdfasdf";

    SomeClass foo = new SomeClass();

    //this works fine
    uploadedDocument.SaveAs(fileName)

    //this does not work
    foo.Save(uploadedDocument, fileName);
}

public class SomeClass
{
    public void Save(HttpPostedFile file, string fileName)
    {
        //database save
        file.SaveAs(fileName);
    }
}

When I try to pass the HttpPostedFile into the Save method on SomeClass, there is a compiler error (because in the above, uploadedDocument is of type HttpPostedFileBase, not HttpPostedFile).

However, if I try to cast uploadedDocument to HttpPostedFile, it does not work.

So, specifically, how can I pass an HttpPostedFileBase to another method? Or, more generally, if I were to pass the HttpPostedFileBase.InputStream to another method, how can I save that document to the server? Note that the document is not an image and I am not streaming the response to the user, so writing to the response stream isn't appropriate...I think.

Upvotes: 0

Views: 2610

Answers (1)

ars
ars

Reputation: 123498

You should just use HttpPostedFileBase, for example in the SomeClass.Save method. The HttpPostedFile class doesn't actually derive from the HttpPostedFileBase, so you're bound to get the compiler error you noticed. You might also see the documentation for HttPostedFileWrapper which is used for the reverse scenario: passing HttpPostedFile to a method that accepts HttpPostedFileBase.

Upvotes: 4

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