![mvc file upload example mvc file upload example](https://img.techbrij.com/1382/file-upload-flow-diagram.png)
We want to allow users to safely upload and download files to go along with other data, and using ASP.NET MVC means you can use Html Helpers as an easy way to provide this functionality. SummaryĬode for uploading and downloading files are mandatory tasks for Web developers at some point in time. Media types as well as the enum are available so you can designate the file type for download, as the above samples demonstrate. Sometimes the file is from a stream or byte array, or sometimes you only have a simple file path.
![mvc file upload example mvc file upload example](https://www.logicbig.com/tutorials/spring-framework/spring-web-mvc/file-upload/images/form.png)
The various ways to return a file are very similar but allow sufficient customizations to meet the needs of most scenarios. Return new FileStreamResult( new FileStream( “”, FileMode. Octet ) įileStreamResult : Sends a stream out to the response. Return new FilePathResult ( “~/App_Data/Images/” + ImageName,.
![mvc file upload example mvc file upload example](https://i.ytimg.com/vi/QzvPUjojJcE/sddefault.jpg)
In the FilePathResult you can return a File type or a FileStreamResult. Return new FileContentResult (byteArray, “image/jpeg” ) įilePathResult : Returns a file on disk when you must access via a file path. In this scenario, you might have obtained the file as a byte array from a database call. However, you can also return a FileContentResult, FilePathResult, or FileStreamResult (don’t forget to match the action method’s return type to the type you will use):įileContentResult : Use this when want to use a byte array to access the file. Public FileResult Download( string ImageName)
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I’m using the defaults but you might want to consider configuring Routing so that the URL looks friendlier.Īs users click on the download link, the Download action method returns a FileResult: The ActionLink Helper renders links that point to the Home controller’s Download action method, passing in the image name as a query string. The image below is what the download view produces. Since the default encoding type is “text-plain” the HTTP Request will not send binary data (that means files!) to the server along with the usual textual form data, so you must set the enctype attribute to multipart/form data or it will not work!īelow is a complete sample of an MVC view containing a form with a file input and submit button: using (Html.BeginForm( "Upload", "Home", FormMethod. Docker Compose: Spring Boot and MySQL example. Deployment: Deploy Spring Boot App on AWS Elastic Beanstalk.
#Mvc file upload example how to
The Html.BeginForm helper expects an enctype attribute that designates that the form can send binary data as well as textual data in the HTTP POST request. In this tutorial, I will show you how to upload/import Excel file data into MySQL Database using Spring Boot & Apache POI, then export Rest API to return Excel file from database table. In the case of the Html.BeginForm helper, we are rendering a element. Using Helpers is a great way to take advantage of built in features of the ASP.NET MVC framework such as accessing routing information to create a link or using strongly typed objects to render HTML.
#Mvc file upload example code
This is the same HTML and MVC code that you already know. To start, we need a view and controller pair to upload a file. Fortunately, it’s easy to write code to upload and download files using ASP.NET MVC. Uploading and downloading files are common functions you’ll see in most websites and apps.