MSDN Library

Controller.File Method (Stream, String)

Creates a FileStreamResult object using the Stream object and content type.

Namespace:  System.Web.Mvc
Assembly:  System.Web.Mvc (in System.Web.Mvc.dll)

protected internal FileStreamResult File(
	Stream fileStream,
	string contentType


Type: System.IO.Stream
The stream to send to the response.
Type: System.String
The content type (MIME type).

Return Value

Type: System.Web.Mvc.FileStreamResult
The file-content result object.

The result object that is prepared by this method is written to the response by the MVC framework when the object is executed. The MediaTypeNames class can be used to get the MIME type for a particular file extension.

The following example shows how to display an image file in a browser.

public ActionResult ShowFile(string id) {
    fileDetail fd = getFileDetails(id);
    return File(fd.fileBytes, fd.mimeType);

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