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 posts, threads in a dileresult place. To understand how it generates the header see the source code. 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.

In the above action we have done couple of validations against the uploaded file. There are already plenty of articles written on this subject. Behind the scenes 3. Conttenttype files in the server can be easily sent as response to the clients through its rich support of action results. So far we have seen how to upload files to server and validate them using data annotations.

The below listing shows the simplified version contentytpe the upload action after using view model.

If you’re working with ASP. How about reading multiple files POSTed to the contentyype The main benefit of this technique is the simplicity: Step 9 Create a link to call the downloadfile method of conrenttype home controller. I used to have mine too, until I found this great GitHub project that covers a gigantic amount of them: 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.


There are three built-in classes that implements FileResult: We can even pass a file download name to the FilePathResult. This class mainly does the job of adding Content-Type and Content-Disposition headers into the response. Fi,eresult 12 Create a link to call the downloadTextFile method of the home controller. Creating custom validation attribute is not a difficult job!

The value providers are the components that gets the value needed from the particular source filereslut, form etc. Notify me of new posts by email.

If you forget setting the proper encoding type then only the filename is submitted not the file. This site uses Contenttyppe to reduce spam. You can find the file in the download folder.

File Result in Controller Sample in MVC: Day 15

TryGetValue extensionout mime? Notify me of follow-up comments by email.

But what we are interested here is to know the supporting classes. Adding the Content-Type header is not a big deal while contentfype the value of the Content-Disposition header is not an easy job and the FileResult class uses a private class ContentDispositionUtil for that purpose.

Note that the validation attributes applied over the File property are custom ones and not exists in the data annotations assembly. The Contentype tries first to get the header value using the ContentDisposition class which is located in the System.


Cnotenttype it will add an action result method to the controller. I really appreciate them. 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. The important thing is the name of the file input controls should match the rules of model binding.

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

Using view contenttype to validate POSTed files 5. So uploading a single file and reading it from the server is quite easy, all we need is to set the HttpPostedFileBase type as a parameter in the corresponding action method. When we use the HttpPostedFileBase directly as action parameter then we have to validate the file manually as shown in the below listing.

Reading files from request 3. In the coming sections we will see how we can easily return a file as response to the clients. We can easily create new file action results by deriving from the the abstract class FileResult.

Like any other input data the POSTed files to the server also needs validation. How to upload a file?