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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Using view models to validate POSTed files 5. For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult.

This is undoubtely a major issue that might leads some to prefer the following method instead. To return a file from server all we have to do is set the proper Content-TypeContent-Disposition headers and write contenttyppe file into the response.

So create another action method and return the file.

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

Request a new Category View All. In the coming sections we will see how we can easily return a file as response to the clients. Finally we have to replace the action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding happens.

Step 11 The file creates a filepathresult object using file name and content type.


In the below listing we can see how to read the POSTed file from the request and save to the server. November 10, November 10, Lets create a view model that wraps HttpPostedFileBase as a property which is decorated with data annotation attributes. We can use our FileStringResult as shown in the below action.

Controller helper methods to return files 9. POSTing a file to the server is quite simple. Learn how your comment data is processed.

If it fails then generate the header value based on RFC from its own methods. We can easily create new file action results by deriving from the the abstract class FileResult. How to return a file as response? For the content-types the browser can’t display to the user it opens the save dialog ex.

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

If you forget setting the proper encoding type then only the filename is submitted not the file. We can even pass a file download name to the FilePathResult. TryGetValue extension, out mime?

c# – mvc file contenttype – Stack Overflow

Right-click on “Index” and select “Add View Returning files through action results 7. Web namespace — System. The important thing is the name of the file input controls should match the rules of model binding.

In the above action we have done couple of validations against the uploaded file.


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

How to upload a file? There are three built-in classes that implements FileResult: Step 13 Run the project, click on “Return File” and the text file will be fiileresult in the browser. 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.

Leave a Reply Cancel reply Your email address will not be published. TryGetValue extensionout mime? Generic ; using System. Step 3 Name the controller as in the following:. Notify me of new posts by email.

Step 6 Add a title to the index page. There are many of them available throughout the web: How a browser knows what contentttpe type is returned from the server? The below listing shows the simplified version of the upload action after using view model. You may think why no value providers are used in this case, it’s because the source is single and clear i. We don’t need to worry about adding any headers in the response the action results will take care.