Add the following else if condition to this method: //1 else if result is ORKFileResult { let fileResult = result as! ORKFileResult //2 retDict[“contentType”] = fileResult. A slightly more sophisticated example is the FileResult class. This class supplies a public property, the ContentType property that contains the. For example, to return a pdf file from the server the Content-Type should FileResult: FilePathResult, FileContentResult and FileStreamResult.

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Well, in this article I gathered the important concepts that are scattered in different filersult, threads in a single place. How a browser knows what file type is returned from the server? So why another article?

The MVC framework is designed in such a way that these two components are loosely coupled and hence a binder don’t need to worry about which value provider it has to interact to get the value for a property or parameter likewise a value provider don’t need to worry about who is asking the value.

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. Notify me of follow-up comments by email. In this article we learnt many things about uploading and returning files in an MVC application.

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.

If you forget setting the proper encoding type then only the filename is submitted not the file.


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

This is an abstract class derived from ActionResult that fileredult writing the file in the response to the subclasses. For example, in the case of image we need the file should be one of the supported image types like cileresult, jpeg, png by the server and we may also need validations to check the file size, file name etc. The reason is pretty much obvious: I really appreciate them.

Reading files from request 3. We discussed about the different confenttype 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. Learn how your comment data is processed.

To understand how it generates the header see the source code.

We can even pass a file download name to the FilePathResult. How fileersult return a file as response? We saw how we can apply validations to the POSTed files easily using view models.

The FileStreamResult reads chunks contentytpe data from the stream and write into the response. Step 5 Name the view and select “Empty without model ” as the template. So far we have seen how to upload files to server and validate them using data annotations.

There are many of them available throughout the web: Leave a Reply Cancel reply Your email address will not be published.

The important thing is the name of the file input controls should match the rules of model binding. To return a file from server all we have to do is set the proper Content-Type contentgype, Content-Disposition headers and write the file into the response. How to Deploy a ASP. The Content-Type header is the one that says the browser what kind of file is being returned from the server. The model binding feature relies on two types of components binders and value providers.


Finally we have to replace the action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding happens. Generic ; using System. Example, when you return a pdf file, some browsers knows how to display the pdf files inside it, same for images.

Request a filerdsult Category View All. Step 9 Create a link to call the downloadfile method of the home filetesult.

Step 3 Name the controller as in the following: Lets create a view model that wraps HttpPostedFileBase as a property which is decorated with data annotation attributes. For some content types the browser doesn’t open the save dialog and display the content directly inside its window.

Issue with the PDF file name generating using the FileResult | The Forums

Step 6 Add a title to the index page. You can see the complete code of FilePathResult here.

You can see the complete code of FileContentResult here. In the below listing we can see how to read the POSTed file from the request and save to the server. This article describes the file result in a Controller in MVC.