April 30, 2019 posted by

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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However, there is a major caveat: If you’re working with ASP.

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

Split ” ” If Not data. There is a MimeMapping class in.

The Content-Type header is the one that says the browser what kind of file is being returned from the server. How is the Display function used inside the fileztreamresult When we use the HttpPostedFileBase directly as action parameter then we have to validate the file manually as shown in the below listing. TryGetValue mimeTypeout extension.

For the content-types the browser can’t display to the user it opens fileatreamresult save dialog ex. How to upload a file? The FileStreamResult reads chunks of data from the stream and write into the response.

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

To understand how it generates the header see the source code. The size of each chunk is 4KB and this can’t be changed through code or filestreamresulr. The reason is pretty much obvious: Learn how your comment data is processed. GetExtension method so you don’t have to split the file name manually.


I populate it when I upload a file. Notify me of new posts by email. I made a Filedtreamresult helper class based on Zacks response.

I use a custom config section in web. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. November 10, November 10, This class mainly does the job of adding Content-Type and Content-Disposition headers into the response.

OpenSubKey ext ; if regKey! Display is one of its Views. For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult. The compiler is smart enough to implement a switch statement using a dictionary, or some other structure depending on how it thinks it will get better performance. Sign up using Facebook. Item FileExtension1 Else Debug. I used to have mine too, until I found this great GitHub project that covers a gigantic amount of them: A dictionary may be a good idea, especially if you want the list of supported extensions to be dynamic, or have it loaded in from a config file or something.

To return filestreamresklt file from server all we have to do is set the proper Content-TypeContent-Disposition headers and write the file into the response. Cnotenttype below code snippet shows how we can return a file just plain from an action without using action results.


FileStreamResult(Stream, String) Constructor () | Microsoft Docs

GetExtension and map that to one of the types listed in Extensions. Email Required, but never shown.

I’m sure this article will help the MVC programmers to increase their grip on the framework. How a browser knows what file type is returned from the server? Note that the validation attributes applied over the File property are custom ones and not exists in the data annotations assembly. The value providers are the components that gets the value needed from the particular source query-strings, form etc. MVC framework eases the job of returning files through its built-in action results.

Net 10 is a little nicer 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. This site uses Akismet to reduce spam. filestreamreshlt