Many posts in internet says that HttpPostedFileBase is a read only and we cannot change the content type. Can anybody let me know how we. Just make sure you derive your custom attribute class from the ValidationAttribute base class and apply it to HttpPostedFileBase properties in. The HttpPostedFileBase is created to substitute HttpPostedFile in MVC .. For example, to return a pdf file from the server the Content-Type.

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If it fails then generate the header value based on RFC from its own methods. How to change the content type of httppostedfilebase?

Sign up using Email and Password. Adding the Content-Type header is not a big deal while determining the value of the Content-Disposition header is not an easy job and the FileResult class uses a private class ContentDispositionUtil for that purpose. Chances are they have and don’t get it.

I have also written an article on this here. Thaks – I have changed the foreach to: What else do you usually check when you validate the uploaded files?


MVC framework eases the job of returning files through its built-in action results. Email required Address never made public. How do I fix “entitytype httppostedfilebase has no key defined.

How to return a file as response? How a browser knows what file type is returned from the server? Is there a better way for example by looking at uploadFile.

This httppstedfilebase contains a single abstract method called WriteFile that every httpposedfilebase should implement.

Validate uploaded image file in MVC 5 HttpPostedFileBase – Just Simply Code

For example, let see how we httppostedfipebase create a custom action result httppostedfilwbase return files from string, let’s call it FileStringResult. Like any other input data the POSTed files to the server also needs validation. The type of the file matches the file extension? We discussed about the different types of file action results that helps to return files from the server and even we created a custom file action result that returns a file from string.

Notify me of new posts via email. How can I change the content of googletranslate.

Validate uploaded image file in MVC 5 HttpPostedFileBase

The extension of the uploaded file is valid? We saw how we can apply validations to the POSTed files easily using view models. How about reading multiple files POSTed to the server? Is any file uploaded? The below listing shows the simplified version of the upload action after using view model.


Sometimes you also have to check: You are commenting using your Twitter account. What I have tried: Controller helper methods to return files 9. Can anybody let me know how we can change the content type of HttpPostedFileBase.

You could check the file name and extension and MIME type but that might not be reliable because the user could simply rename the file before uploading. Darin Dimitrov k Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

The file already exists on the server? Please Sign up or sign in to vote. The “What I Tried” section should show the code you tried if you tried anything at all.