A small class to retrieve the MIME Type of any file and/or extension in C# using Windows Registry or a static MIME Type Map for I have even tried FilePathResult and FileStreamResult nothing works public FileResult “must-revalidate”); return File(path, contentType); }. Я заменил столбец FileExtension в моей таблице базы данных столбцом ContentType. Я заполняю его, когда я загружаю файл. Private Sub.

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Как определить тип содержимого файла в .NET?

The files in the server can be easily sent as response to the clients through its rich support of action results. The important thing is the name of the file input controls should match the rules of model binding. It doesn’t check the magic bytes. How about reading multiple files POSTed to the server?

I’m sure this article will help the MVC programmers to increase their grip on the framework. Actually you don’t need to instantiate the FileResult types from action methods the Controller has bunch of built-in methods that helps to easily send a file in response.

Uploading and returning files in an ASP.

FileStreamResult , FilePathResult File for action MVC not working for image | The Forums

Your email address will not be published. Well, in this article I gathered the important concepts that are scattered in different posts, threads in a single place. When the user want to save the file sent to the browser, the server can suggest a filename to the client and the Content-Disposition header is just for that. The below listing shows the simplified version of the upload action after using view model.


We saw how we can apply validations to the POSTed files easily using view models. End Sub I determine the content type with this function: We don’t need to worry about adding any headers in the response the action results will take care. AsyncUtil — C Helper class to run async methods as sync and vice-versa A useful helper class written in C Sharp to help developers working with async and sync methods in ASP.

StriplingWarrior, or keep a single static dictionary. Brilliant, much better than me pulling information down and creating a MimeMapping table myself. It looks like you still have the filename when you go to set the content type. Assuming the person downloading it will be using a web browser, try to stick to the common ones: 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.

POSTing a file to the server is quite simple. Sign up or log in Sign up using Google. For the content-types the browser can’t display to the user it opens the save dialog ex.

Get a File Content-Type / MIME-type from file extension in ASP.NET C#

You can use This list, that contains file extensions. If you forget setting the proper encoding type then only the filename is submitted not the file. How to return a file as response? filestreamersult


The below code snippet shows how we can return a file just plain from an action without using action results. For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult.

This is undoubtely a major issue that might leads some to prefer the following method instead.

content-type – Как определить тип содержимого файла в .NET? – Qaru

Like any other input data the POSTed files to the server also needs validation. Using view models to validate POSTed files 5. Stack Overflow works best with JavaScript enabled.

I really appreciate rilestreamresult. For some content types the browser doesn’t open the save dialog and display the content directly inside its window.

There is no page. You can see the complete code of FilePathResult contenttype. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. NET simply maps to the extension given in the filename string.

The Content-Type header is the one that says the browser what kind of file is being returned from the server. How to Deploy a ASP. We can easily create new file action results by deriving from the the abstract class FileResult.

So why another article? We can even pass a file download name to the FilePathResult .