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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How about fioeresult multiple files POSTed to the server? However, there is a major caveat: If you’re working with ASP. MVC framework eases the job of returning files through its built-in action results.

Example, when you return a pdf file, some browsers knows how to display the pdf files inside it, same for images. There are already plenty of articles written on this subject. November 10, November 10, The below listing shows the simplified version of the upload action after using view model. The ContentDispositionUtil tries first to get the header value using the ContentDisposition class which is located in the System.

Uploading and returning files in an ASP. TryGetValue extension, out mime? The size of each chunk is 4KB and this can’t be changed through code or config. To understand how it generates the header see the source code. Notify me of new posts by email. There are many of them available throughout the web: For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult. You can find the file in the download folder.


The reason is pretty much obvious: Step 3 Name the controller as in the following: You can see the source code here. Instead of manually reading the file from the Requestby taking the advantage of model binding the file can be made directly available as a parameter in the action as shown in the below listing.

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

Web namespace — System. So why another article?

The model binding feature relies on two types of components binders and value providers. Thanks for all the readers who pointed out the errors and typos in the article.

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

In the above action we have done couple of validations against the uploaded file. Step 13 Run the project, click on “Return File” contentrype the text file will be opened in the browser. Visual Studio New Features. Cojtenttype multiple files 5. 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 used in this case. Step 3 Name the controller as in the following:.


We can use our FileStringResult as shown in the below action. The main benefit of this technique is the simplicity: This class contains a single abstract method called WriteFile that every subclass should implement.

But what we are interested here is to know the supporting classes. You may think why no value providers are used in this case, it’s because the source is single and clear i. For some content types the browser doesn’t open the save dialog and display the content directly inside its window. The contenttupe thing to note down is the file parameter name should be same as the name of the file input control in the above case xontenttype is photo. November 14, November 14, Well, in this article I gathered the important concepts that contentty;e scattered in different posts, threads in a single place.

Generic ; using System. Like any other input data the POSTed files to the server also needs validation. The FileStreamResult reads chunks of data from the stream and write into the response. This class mainly does the job of adding Content-Type and Content-Disposition headers into the response.

Using view models to validate POSTed files 5.