Many posts in internet says that HttpPostedFileBase is a read only and we cannot change the content type. Can anybody let me know how we. Just make sure you derive your custom attribute class from the ValidationAttribute base class and apply it to HttpPostedFileBase properties in. The HttpPostedFileBase is created to substitute HttpPostedFile in MVC .. For example, to return a pdf file from the server the Content-Type.

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In the coming sections we will see how we can easily return a file as response to the clients. What you always have to check: The value providers are the components that gets the value needed from the particular source query-strings, form etc. Sign up using Facebook. If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Well, in this article I gathered the important concepts that are scattered in different posts, threads in a single place.

Please Sign up or sign in to vote. I’m sure this article will help the MVC programmers to increase their grip on the framework.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Note that the httppowtedfilebase attributes applied over the File property are custom ones and not exists in the data annotations assembly.


Как получить содержимое/тип файла во время выполнения

Or you can check it on client side thru html attribute ‘accept’ to filter the httppostedfilease asap: This class mainly does the job of adding Content-Type and Content-Disposition headers 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.

Chances are they have and don’t get it. The model binding feature relies on two types of components binders and value providers.

Content Type / File Extension How can I do this in MVC? | The Forums

Kristian Jay 81 7. Finally we have to replace httppkstedfilebase action parameter from HttpPostedFileBase to UploadFileModel and the validations will happen automatically when the binding happens. Post as a guest Name. I think bringing across the example code, you should probably have removed the limitation wanted on the other post of ‘not exceeding 1MB’ by removing the 2nd if statement – doesn’t help in answering this question. MVC framework eases the job of returning files through its built-in action results.

How about reading multiple files POSTed to httpplstedfilebase server?

How to change the content type of httppostedfilebase?

POSTing a file to the server is quite simple. We can use our FileStringResult as shown in the below action. Thanks for all the readers who pointed out the errors and typos in the article. Darin Dimitrov k Here’s a reliable way to achieve that by looking at the contents of the file: 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.


Treat my content as plain text, not as HTML. Uploading and returning files in an ASP. 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.

content-type – Как получить содержимое/тип файла во время выполнения – Qaru

Thanks for sharing with us. Never mind got it working.

How to return a file as response? The ContentDispositionUtil tries first to get the header value using the ContentDisposition class which is located in the System. Reading files from request 3.

But what we are interested here is to know the supporting classes. Instead of doing it manually it would be great if you could do that using data annotation attributes and for that we have to use view models. You are commenting httppostedfilenase your Twitter account. Can anybody let me know how we can change the content type of HttpPostedFileBase.