January 12, 2021

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

Step 3 Name the controller as in the following:. Step 6 Add a title to the index page. Request a new Category View All.

Since it’s also a lead designer for many App and games for Android, iOS and Windows Phone mobile devices for a number of italian companies. Fileredult 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.

File action-results class diagram. To return a file from server all we have to do is set the proper Content-TypeContent-Disposition headers and write the file into the response. Right-click on “Index” and select “Add View For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult.

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

Step 4 Now we need to create a view. We can use our FileStringResult as shown in the below action.


For example, in the case of image we need the file should be one of the supported image types like jpg, jpeg, png by the server and we may also need validations to check the file size, file name etc. The POSTed file s are available as parameters directly in actions through model binding. This article describes cpntenttype file result in a Controller in MVC.

The binders are the components that really fills the properties of a model or the parameters in the action with those values. Visual Studio New Features. Note that the validation attributes applied over the File property are custom ones and not exists in the data annotations assembly.

MVC framework eases the job of returning files through its built-in action results. So far we have seen how to upload files to server and validate them using data annotations.

Uploading and returning files in MVC

Notify me of follow-up comments by email. But what we are interested here is to know the supporting classes. This class contains a single abstract method called WriteFile that every subclass should implement.

Thanks for all the readers who pointed out the errors and typos in the article.

Like any other input data the POSTed files to the server also needs validation. There are many of them available throughout the web: When you have fileresilt 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. Contenttupe ContentDispositionUtil tries first to get the header value using the ContentDisposition class which is located in the System.


POSTing a file to the server is quite simple.

Finally we have to replace the action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding fileresylt. Aggiungi e-mail alla newsletter. I used to conrenttype mine too, until I found this great GitHub project that covers a gigantic amount of them: To understand how it generates the header see the source code.

We can even pass a file download name to the FilePathResult. Adding the Content-Type header is not a big deal while determining the value of the Content-Disposition header is not contsnttype easy job and the FileResult class uses a private class ContentDispositionUtil for that purpose.

Generic ; using System. In the above action we have done couple of validations against the uploaded file. Step 12 Create a link to call the downloadTextFile method of the home controller. Step 11 The file creates a filepathresult object using file name and content type.