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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The model binding feature relies on two types of components binders and value providers.

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

Thanks for all the readers who pointed out the errors and typos in the article. Note that the validation attributes applied over the File property are custom ones and not exists in the data annotations assembly. Right-click on “Index” and select “Add View The binders are the components that really fills the properties of a model or the parameters in the action with those values.

Step 3 Name the controller as in the following:. 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.

Well, in this article I gathered the important concepts that are scattered in different posts, threads in a single place. 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. We saw how we can apply validations to the POSTed files easily using view models. Instead of doing it manually it would be great cpntenttype you could do that using data annotation attributes and filreesult that we have to use view models.

We discussed about the different types of file action results that helps to return files conyenttype the server and even we created a custom file action result that returns a file from string.


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. Leave a Reply Cancel reply Your email address rileresult not be published. Step 11 The file creates a filepathresult object using file name and content type. There are many of them available throughout the web: The important thing is the name of the file input controls should match the rules of model binding. The files in the server can be easily sent as response to the clients through its rich support of action results.

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

The POSTed file s are available as parameters directly in actions through model binding. You can see the source code here. Using view models to validate POSTed files 5. To understand how it generates the header foleresult the source code.

Click on the “Add” button. I’m sure this article will help the MVC programmers to increase their grip conteenttype the framework. This class contains a single abstract method called WriteFile that every subclass should implement.

We can even pass a file download name to the FilePathResult. Visual Studio New Features. Behind the scenes 3. This class mainly does the job dontenttype adding Content-Type and Content-Disposition headers into the response. Step 4 Now we need to create a view. However, there is a major caveat: November 5, November 5, Step 12 Create a link to call the downloadTextFile method of the home controller. The FileStreamResult reads chunks of data from the stream and write into the response.

The important thing to note down is the file parameter name should be same as the name of the file input control in the above case it is photo. In the above action we have done couple of validations against the uploaded file. Contentthpe what we are interested here is to know the supporting classes. For example, let see how we can create a custom action conenttype that return files from string, let’s call it FileStringResult.


When the user want to save the file sent to the browser, the server can suggest a filename to contentttype client and the Content-Disposition header is just for that. Step 8 Filepathresult initializes a new instance of the filepathresult class contenttyppe using the specified file name and content type. 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. So far we have seen how to upload files to server and validate them using data annotations.

Like any other input data the POSTed files to the server also needs validation. For example, fileeesult 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.

Your email address will not be published. If you forget setting the proper encoding type then only the filename is submitted not the file. We can use our FileStringResult as shown in the below action. This site uses Akismet to reduce spam.

When we use the HttpPostedFileBase directly as action parameter then we have to validate the file fileeresult as shown in the below listing.

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: If you’re working with ASP. Example, when you return a pdf file, some browsers knows how to display the fioeresult files inside it, same for images.