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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Step 5 Name the view and select “Empty without model ” as the template. And it will add an action result method to the controller.

I used to have mine too, until I found this great GitHub project that covers a gigantic amount of them: In the below listing we can see how to read contentgype POSTed file from the request and save to the server. 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.

For the content-types the browser can’t display to the user it opens the save dialog ex. November 14, November 14, The reason is pretty much obvious: There are many of them available throughout the web: Creating custom validation attribute is not a difficult job! Leave a Reply Cancel reply Your email address will not be published.

The files in the server can be easily sent as response to the clients through its rich support of action results. There are three built-in classes that implements FileResult: Step 4 Now we need to create a view.

We can easily create new file action results by deriving from the the abstract class FileResult. The important thing is the name of the file input controls should match the rules of model binding.


If it fails then generate the header value based on RFC from its own methods.

How to return a file as response? Notify me of follow-up comments by email. Step 6 Add a title to the index page. We saw how we can apply validations to the POSTed files easily using view models.

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. Using view models to validate POSTed files contentgype.

You can see the complete code of FilePathResult here. Request a new Category View All. GetAssembly typeof HttpApplication. The below listing shows the simplified version of the upload action after using view model. The MVC framework is designed in such a way that these two components are loosely coupled and hence a binder don’t need to worry about which value provider it has to interact to get the value for a property or parameter likewise contenrtype value provider don’t need to worry about who is asking the filereslut.

But what we are interested here is to know the supporting classes. 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 contenttpe result that returns a file from string.

The model binding feature relies on two types of components binders and value providers. Controller helper methods to return files 9.

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

This class contains a single abstract method called WriteFile that every subclass should implement. November 5, November 5, TryGetValue mimeTypeout extension. Note that the validation attributes applied over the File property are custom ones and not exists coontenttype the data annotations assembly.

This class mainly does the job of adding Content-Type and Content-Disposition headers into the response. This article describes the file result in a Controller in MVC. November 10, November 10, You can see the complete code of FileContentResult here.


You can see the source code here. The binders are the components that really fills contenttyoe properties of a model or the parameters in the action with those values. Right-click on “Index” and select “Add View Well, in this article I gathered the important concepts that are scattered in different posts, threads in a single place. Step 3 Name the controller as in the following: How about reading multiple files POSTed to the server?

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

For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult. 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.

Like any other input data the POSTed files to the server also needs validation. Generic ; using System. This is undoubtely a major issue that might leads some to prefer the following method instead.

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

To understand how it generates the header see the source code. The FileStreamResult reads chunks of data from the stream and write into the response.

Instead of manually reading the file from the Requestby taking the advantage of model binding the file can be made directly available as a filerrsult in the action as shown in the below listing. Example, when you return a pdf file, some browsers knows how to display the pdf files inside it, same for images.