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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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I’m sure this article will help the MVC programmers to increase their grip on the framework. Generic ; using System. November 14, November 14, Finally we have to replace the action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding happens. Akshay Patel Aug 25 When we use the HttpPostedFileBase directly as action parameter then we have to validate the file manually as shown in the below listing. Right-click on “Index” and select “Add View For the content-types the browser can’t display to the user it opens the save dialog ex.

I used to have mine too, until I found this great GitHub project that covers a gigantic amount of them: Instead of doing it manually it would be great if you could do that using data annotation attributes and for that we have to use view models.

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I really appreciate them. Step 5 Name the view and select “Empty without model ” as the template. Step 9 Create a link to call the downloadfile method of the home controller.

Step 11 The file creates a filepathresult object using file name and content type. Your email address will not be published. Note that the validation attributes applied over the File property are custom ones and not exists in the data annotations assembly.

The below code snippet shows how we can return a file just plain from an action without using action results.

Uploading and returning files in MVC

In the coming sections we will see how we can easily return a file as response to the clients. We can even pass a file download name to the FilePathResult.

However, there is a major caveat: How to Deploy a ASP. File action-results class diagram.

You can see the complete code of FileContentResult here. Visual Studio New Features. How about reading multiple files POSTed to the server?

Step 6 Add a title to the index page. The reason is pretty much obvious: The POSTed file s are available as parameters directly in actions through model binding. The FileStreamResult reads fileresilt of data from the stream and write into the response.

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Like any other input data the POSTed files to the server also needs validation. TryGetValue mimeTypeout extension.

Notify me of follow-up comments by contehttype. We don’t need to worry about adding any headers in the response the action results will take care. Reading files from request 3. 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.

Uploading and returning files in an ASP.

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

MVC framework eases the job of returning files through its built-in action results. Aggiungi e-mail alla newsletter. For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult.