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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Right-click on “Index” and select “Add View The below listing shows the simplified version of the upload action after using view model. TryGetValue extension, out mime? GetAssembly typeof HttpApplication. The binders are the components that really fills the properties of a model or the parameters in the action with those values.

c# – mvc file contenttype – Stack Overflow

The reason is pretty much obvious: Well, in this article I gathered the important concepts that are scattered in different posts, threads in a single place. We can even pass a file download name to the FilePathResult.

Leave a Reply Cancel reply Your email address will not be published. When the user vontenttype to save the file sent to the browser, the server can suggest a filename to the client and cpntenttype Content-Disposition header is just for that. November 14, November 14, Step 9 Create a link to call the downloadfile method of the home controller.

Uploading and returning files in MVC

POSTing a file to the server is quite simple. There are already plenty of articles written on this subject.

And it will add an action result method to the controller. Learn how your comment data is processed. Instead of doing it manually it would be great if you could do that using data annotation attributes and fileresutl that we have to use view models. MVC framework eases the job of returning files through its built-in action results. For the content-types the browser can’t display to the user it opens the save dialog ex.


So uploading a single file and reading it from the server is quite easy, all we need is to set the HttpPostedFileBase type as a parameter in the corresponding action method.

Uploading and returning files in an ASP. 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 contentrype we may also need validations to check the file size, file name etc.

Using view models to validate POSTed files 5. If you’re working with ASP. How to return a file as response? Akshay Patel Aug 25 Notify contenttypr of new posts by email. AsyncUtil — C Helper class to run async methods as sync and vice-versa A useful helper class written in C Sharp to help developers working with async and sync methods in ASP.

Lets create a view model that wraps HttpPostedFileBase as a property which is decorated with data annotation attributes. OpenSubKey ext ; if regKey! The value providers are the components that gets the value needed from the particular source query-strings, form etc.

Creating custom validation attribute is not a difficult job! For example, let see how we can create a custom action result that return files from string, let’s call it FileStringResult. November 5, November 5, Aggiungi e-mail alla newsletter. Like any other input data the POSTed files to the server also needs validation. So create another action method and return the file. This is undoubtely a major issue that might leads some to prefer the following method instead.

Finally we have to replace the action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding happens. We saw how we can apply validations to the POSTed files easily using view models. If you forget setting the proper encoding type then only the filename is submitted not the file.


But what we are interested here is to know the supporting classes.

When you have contentttype 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 13 Run the project, click on “Return File” and the text file will be opened in the browser. Your email address will not be published. If it fails then generate the header value based contenttyps RFC from its own methods. How about reading multiple files POSTed to the server?

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

Request a new Category View All. You can see the complete code of FileContentResult here. This article describes the file result in a Controller in MVC.

Example, when you return a pdf file, some browsers knows how to display the pdf files inside it, same for images. You can see the complete code of FilePathResult here. Adding the Content-Type header is not a big deal while determining the value of the Content-Disposition header is not an easy job and the FileResult class uses a private class ContentDispositionUtil for that purpose. November 10, November 10, 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.