In the second popup select template as web api and click on ok. Dinktopdf is a crossplatform oriented library which is the wrapper for the webkit html to pdf library. In this tutorial we web layer, you must turn to spring mvc. In this article will discuss how can we generate a new pdf file and. Your api will return something like return new filestreamresultpdfstream, application pdf where pdfstream is a stream of your pdf, either from a pdf generator that returns the pdf as an inmemory stream, or a stream from a file if it is on the disk.
The producesresponsetype attributes type property can be excluded. If you wish to build a website please use regular mvc or something else. This is a very regular requirement especially for online education or. Net mvc 4 web application from types of application as shown below. I am not exactly sure which part to blame, but heres why memorystream doesnt work for you as you write to memorystream, it increments its position property. Here mudassar ahmed khan has explained with an example, how to return download file using web api in asp. Interestingly web application project defaults to razor pages. Frankly, a webapi controller returns nothing but data, never a view page. I am trying to learn web api by my own, for the same i have developed very basic login application in and middle layar as web api to interact with database.
How to return a pdf from a web api application stack overflow. Net core web api with various scenarios and came up with these tips for anyone out there wanting to do the same. Downloading an inmemory file using web api 2 no dogma blog. For example, in mvc we define url format using routeconfig class and registerroutes static methods. At first you think its going to be easy to download a file from web api, but as i discovered, it was not. Net framework and it also supports contentnegotiationits about deciding the best response format data. Lets take a look at a simple example of web api by creating a new asp. Solved how can i display a pdf from byte array in mvc. Net mvc action results and pdf content simple talk. I will start by mentioning that web api is not meant to deliver html pages.
I got that to return to a server side mvc controller and threw it into a simple return no view that displays the pdf just fine in the browser. Net core project, or to create a pdf document from an existing html page. Action method return type tutorialsteacher online web. Actionresult offers the following benefits over the iactionresult type. In my case i wanted to load data from the database, perform some processing and return a. I am prototyping streaming a pdf file from a web api, and after the download, i double click on the file and it says cant open this file.
The constructor of streamcontent takes into account the streams current position. The action method is merely a public method with no special constraints on the input parameters and is forced to return a type that inherits from a system typethe actionresult type. Lets assume, we have a requirement to send a file based on the file type provided to the service request. Web api possesses a lightweight architecture and is perfect for smartphones and other devices, which possess limited bandwidth. As youll see later, an mvc based service is pretty loose in comparison to a wcf service. This article showsan example of uploading a file in the asp. It is supposed to return pdfs from two different kinds of sources. When youre building apis on the web, there are several ways you can build apis on the web. This article explains how to transfer return filespdfdocexcelzip files from web api service.
Open the visual studio and click file new project menu option. Net community decided to merge the functionality of mvc and web api. Net mvc as a service framework 3 configuration as is the case when building a web site, there isnt much to configure to get an mvc based service up and running. This makes sense since the two have always been very similar.
Downloading pdf file from server to client using asp. Return a base64 representation of the file instead of the raw file contents. The concept of endpoints doesnt exist, and neither do contracts. Relative to the web api server, my mvc application is microsoftiis10. Mvc is used to create web applications that return both views and data but asp. Net web api and how to return result in different formats like json and xml.
The trouble im having is sending the document back to a client mvc application. For creating the file i have managed to get hold of the follo. This blog describes how to generate pdf s with asp. Net mvc is used to create web applications that return both views and data but asp. So if you write to the stream, then pass it to streamcontent, the response will start from the nothingness at the end of the stream. I want to allow user to download a file, this file i will be creating on the server side. For your convenience apress has placed some of the front. It is important for the beginners to be aware that although these are.
Hi, does anyone have an example of returning a pdf from a web api get. In my case i wanted to load data from the database, perform some processing and return a subset of the data as a file. Returning an image in web api method with fallback result. In mvc, to achieve the same functionality we have builtin file return type as below. Everything works fine until the response received at client side.
By default web api makes it easy to return common html content types, such as. Net web api is a framework that is built upon the mvc model view controller principal to assist in rapidly building a restful api using the. How to return a pdf from a web api application 4 i have a web api project that is running on a server. Inside the project template select web api and in the. Most libraries offer a markup language or an api through which you draw. Net web api using mvc and jquery for paging note it supports single page applications.
Download the files as a zip using the green button, or clone the repository to your machine using git. I can see how to do this with normal mvc controllers, but not web. In this article i am doing to show an example of uploading a file in asp. Another important parameter is the object value in the writetostreamasync method. The code above work for the file type like pdf, doc, mov, mp3, png, tif, jpeg, etc. Net web page to return a different type of response such as an image but that is a.
Net core web api project in which we need to generate a pdf report. Want to serve a pdf file with dynamicallygenerated content. Net web api service irrespective of the accept header value 4. I have a web api project that is running on a server. Net web api is a web framework built on top of the. Do not pass file path as a parameter as it is a security risk and it is used here only for example.
Uploading the file from the client is a basic operation. Downloading file using ajax and jquery after submitting. In this article, we will discuss web api and its return types. Add any sample pdf, word, excel, zip name them as sample files into it. Net backend controller which generates a pdf document object. Net web api 2 for mvc developers by adam freeman apress, 2014. It enables you to return a type deriving from actionresult or return a specific type.
Net web api is an ideal platform for building restful applications on the. Thus the download can be made to happen by just setting the window. Here we are assuming that the web api is returning json data that it generally does. Returning file as response to rest request codeproject. They are web application razor pages, web application mvc, and web api see below. Returning html or any file using web api peter rasmussen.