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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Controller helper methods to return files 9. Thanks for all the readers who pointed out the errors and typos in the article. It looks like you still have the filename when you go to set the content type. The files in the server can be easily sent as response to the clients through its rich support of action results. Aggiungi e-mail alla newsletter. I could upload a.
The compiler is smart enough to implement a switch statement using a dictionary, or filestrearmesult other structure depending on how it thinks it will get better performance. Like any other input data the POSTed files to the server also needs validation. I’m sure this article will help the MVC programmers to increase their grip on the framework.
How to upload a file?
How do I know the correct content type of my file? NET simply maps to the extension given in the filename string. The ContentDispositionUtil tries first to get the header value using the ContentDisposition class which is located in the System.
Web namespace — System.
FileStreamResult(Stream, String) Constructor () | Microsoft Docs
We can easily create new file action results by deriving from the the abstract class FileResult. Notify me of new posts by email. Net 10 is a little nicer For the content-types the browser can’t display to the user it opens the save dialog ex. Fllestreamresult up or log in Sign up using Google. But what we are interested here is to know the supporting classes. StriplingWarrior, yep, you’ve got a point on this, the compiler is able to do some white magic with the final code.
Add a string resource to you project that contains the list.
Get a File Content-Type / MIME-type from file extension in ASP.NET C#
The binders are the components that really fills the properties of a model or the parameters in the action with those values. For some content filestreakresult the browser doesn’t open the save dialog and display the content directly inside its window.
Creating custom validation attribute is not a difficult job! The Content-Type header is the one that says the browser what kind of file is being returned from the server.
When you have a single instance of HttpPostedFileBase as an action parameter or a property in model then mapping the file is completely done by the HttpPostedFileBaseModelBinder and no value providers are rilestreamresult in this case.
Email Required, but never shown. A dictionary may be a good idea, especially if you want the list of supported extensions to be dynamic, or have it loaded conhenttype from a config file or something. End Sub I determine the content type with this function: Returning files through action results 7. For example, let see how we can create a custom action result that return files from string, filestreamrezult call it FileStringResult.
You can see the complete code of FileContentResult here. GetAssembly typeof HttpApplication.
FileStreamResult , FilePathResult File for action MVC not working for image | The Forums
In the below listing we can see how to read the POSTed file from the request and save to the server. I dont know what language are you using but this is in vb. GetExtension contentthpe map that to one of the types listed in Extensions. ContainsKey Temp 0 Then data.
Show “Cannot read file from disk.