Here we will be returning a pdf file from the controller method. Let me introduce the efmvc app, if you havent heard about efmvc. The rest of this is the details on everything thats happened. The simplest web api controller can directly return the object in question. Returning raw json data in web api with marten visual. We need to make sure the user is authenticated so anyone else going to the url wont have access to the file. Net mvc provides a simple and versatile means of returning different types of.
It is a very efficient and lightweight technology to build restful web services in. The html part of the view just creates a table with heading coming from the model. Net web api service created earlier in a tutorial i. The test itself has minimal boilerplate code, and it cleans up after itself. The goal of the code in this post is to make these tests simple and readable. Another important parameter is the object value in the writetostreamasync method. Overall it looks like it will meet the needs of the project. In loadall function, we are calling apipersonaldetails url that will.
Frankly, a webapi controller returns nothing but data, never a view page. Data should be returned only as the serialized string jsonconvert. In this tutorial, im going to show you how to use angular to download a file from an authenticated asp. Modify the routing to map to the api controller of pdfviewersample project as follows. It enables you to return a type deriving from actionresult or return a specific type. In some scenarios, we want to return only subset of of an object in our api controller based on user authorization rights. Introduction web api has been around for some years now. Want to serve a pdf file with dynamicallygenerated content. Net web api controller in the efmvc reference application. This post explains the concerns behind the hierarchical resource structure in asp. Net community decided to merge the functionality of mvc and web api. Yes, your mvc code can be a consumer of a webapi, but not the other way around.
This makes sense since the two have always been very similar. The string controller is checked against class names when trying to extract controller types from your api assemblies. Net mvc 4 project through the standard add controller dialog box. In this article, we are going to discuss how to return files pdf wordexcel from web api service. The producesresponsetype attributes type property can be excluded. Returning only a subset of members in webapi baskis blog. Hi, does anyone have an example of returning a pdf from a web api get. Net core web api project in which we need to generate a pdf report. Lets assume, we have a requirement to send a file based on the file type provided to the service request. Net web api package we can also read we can refer to the official documentation create a sample web api controller. Net core and attribute routing makes it dead easy to quickly build your api. Say you have a productcontroller that is concerned with crud operations on products, it might have a method like the below. Rightclick your controllers folder and select add, controller. In this blog post, i will write unit tests for a asp.
Therefore if you are familiar with mvc then its not too difficult to get going with. If your controller is trivial then you may be able to get away with returning an object directly but most real world controllers have multiple return paths and require more control over the response. Exception handling in the key feature in making an application robust and secure. Choose the right return type for webapi controllers. Net cores controllers are unified now, so there isnt a controller and apicontroller base class. This blog describes how to generate pdf s with asp.
Once we imported the required packages we can add an apicontroller to our existing asp. This overhead can be reduced by instructing marten to not perform deserialization and instead just return the json string as stored in postgresql. Net web api and retrieve some products data from the northwind database. With this project i decided to give the help files generator that microsoft created a try. For example, when we send the file type as pdf, service will return pdf. Now, we have web api service controller studentcontroller having get method taking id as parameter and returns a student against it. In the dialog box, name your controller moviecontroller and select the. Using azure app services to convert a web page to pdf. But i dont want to call web api controllers controller.
When the page loads, loadall javascript function will be called. In this article you will learn to build a simple rest style web api that performs crud operations on the customers table of the northwind database. Net mvc 4 beta release and in the process has changed a lot. The trouble im having is sending the document back to a client mvc application. Net web api controller can be created either in the normal asp. Here we will implement exception handling for the same asp. Loading web api controllers from other libraries when self hosting web api posted on october 28, 20 by ovais mehboob when self hosting web api, we have to create controllers on the same project, otherwise it does not detect the libraries even if we reference the web api project where we have all the controllers and classes defined. Take the case of the employee class shown below suppose you need to return only two properties, say id and a new property called name, which is nothing but firstname and lastname concatenated. Since my old approach did not work anymore, i had to create something new. This tutorial teaches the basics of building a web api with asp.
It is supposed to return pdfs from two different kinds of sources. Multiple actions were found that match the request. Net mvc 6 for handling requests, whether they end up returning data or views. Dependency injection properly works for regular apicontrollers, but you should derive your controllers from abpapicontroller, which provides several benefits and integrates better. At the end, you have a web api that can manage todo items stored in a database.
The controller action method will be called using jquery post function and json data will be returned back to the view using jsonresult class object. 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. Jamiekeeling opened this issue on mar 19, 2017 25 comments. Web api design crafting interfaces that developers love 5 a key litmus test we use for web api design is that there should be only 2 base urls per resource. In the implementation of the gets in listing 1 marten is deserializing the json into player objects, only for the object to be serialized back to json to be returned via web api. However, sometimes a problem will occur deep inside your code.
I created a controller assembly containing all my controllers in webapi 2. Actually, the answer is as simple because its hardcoded into the web api source. Net web api exposes json data through a new type of controller called an api controller. If youve been following along as weve created a basic. Net mvc project by following below steps right click the controllers folder and select add controller in the above dialog box, select web api 2 controller with actions, using entity framework. Recently i started a new api project for my company. Efmvc is a simple app, developed as a reference implementation for demonstrating asp. Net, we have multiple ways exception filter, global. Things you didnt know about action return types in asp. However, i wanted to rewrite it using the tocsv extension method from my earlier post using app. Lets model an api around a simple object or resource, a dog, and create a web api for it. Now when i run that application and call the api using fiddler as. There is a web api shim to bring over old controllers for use in asp.
As you can see this interface has multiple get methods that return one item getuserbyid and getuserbycredentials, it also has multiple update methods updateuser and updateuserpassword, in future i might want to add additional get method that returns a collection, like, getallusers, for instance. Net core web api with various scenarios and came up with these tips for anyone out there wanting to do the same. Controllers that return json or those that return views with html are the same so they get to share routes and lots of functionality. This section explains how to add and use a pdf viewer control in your web. Web api is the perfect platform for building restful applications on the. How to return a pdf from a web api application stack overflow. Actionresult offers the following benefits over the iactionresult type. Using the below technique controller can return any other types of file as well like. Net web api, mvc, viewmodels and formatters 10 april, 2012. I have a web api project that is running on a server. There are probably a few more terms i can throw in there, but over the past few days, ive been struggling to bridge the gap from how i build applications in asp. Net web api such as routing, authorization and ownership. In the previous blog post i demonstrated how to get started with the asp.
In fact, when discovering controllers, web api will require the following. I have added a datahelper class in models folder which i added which returns a list of persons. Handling exceptions at different levels is always a tricky task. Net core web application from scratch then you might have wondered when well get to web api as it happens, we already added support for it when we set up mvc in asp. The technical goal is to pass a url to the app service web app and get back a pdf.
As long as a client can read the serialization format, it can deserialize the object. Net mvc action results and pdf content simple talk. Here mudassar ahmed khan has explained with an example, how to use the jsonresult class object for returning json data from controller to view in asp. Now we have done all the necessary set up and added a controller for web api. I can see how to do this with normal mvc controllers, but not web. Use webapi to download file as attachment using attributerouting fileattachmentcontroller. After that element is the placeholder where the records returned from the api will be populated. Net web api by vickram ravichandran the csvmediatypeformatter on github makes it possible to support textcsv media type to the web api stack. Loading web api controllers from other libraries when self. How to download files from authenticated web api end points.
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