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Please Subscribeto the blog to get a notification on freshly published best practices and guidelines for software design and development. Please bookmark this page and share this article with your friends. Read a Large File in Chunks in C# – Guidelinesĭo you have any comments or ideas or any better suggestions to share?.To view, one should use an appropriate extension before downloading a file. One can also use the below mime with the content type as “ application/octet-stream” which is a binary file and kind of generic in nature and works for most types of files. Here you have a byte array and want to return byte content as a file.īelow are a few examples of MIME – content types for your information. Here you have a stream and want to return stream content as a file.įileContentResult – Sends the contents of a binary file to the response. Both FileContentResult & FileStreamResult classes are derived class from Abstract FileResult class.įileStreamResult – Sends binary content to the response by using a Stream instance. Return File(stream, "application/", "FileasStream.xlsx") ĭifference between FileContentResult and FileStreamResultĪs we know FileResult is an abstract base class. Please see the below example to achieve the same. You cal also use the File class for file processing. Return new FileContentResult(byteArr, mimeType) Public async Task DownloadfromBytes(string id)īyte byteArr = _fileInterafces.ReadAsByteStream(id) jpg etc.įor png file we need to use mimeType = “image/png. Using the below technique controller can return any other types of images like. Here we will be returning an image from the Controller method. Here you have a stream and want to return stream content as a file.ĭownload or Return Image (.png) file in. Using FileStreamResult for File DownloadįileStreamResult classes us useful for Sending binary content.
The below examples are more about how to deal with file data streams and leverage FileStreamResult or FileStreamResult classes to deal with file types like excel, pdf, txt, etc.ġ. These methods are coming from the FileResult abstract class and give you multiple options for retrieving files to send to the client. The file helper method is built into your controller. This file download or return technique can be used for any ASP.NET Core or Angular app. We shall see how to perform a download or file return in ASP.NET core-based application. Most of the time, we get requirements to download or return the file within the given ASP.NET Core or Angular or any other UI applications dealing with it. We will use ASP.NET Core WebAPI as a sample to verify how to download Files in ASP.NET Core-based API or MVC application.
xlsx, etc in the browser or any other type of application. In this article, we will see how to Return or Download File in ASP.NET Core API. Return or Download File in ASP.NET Core API