The producesresponsetype attributes type property can be excluded. 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. Can anyone tell me how to solved this one apimsghello. Data should be returned only as the serialized string jsonconvert. Hi, does anyone have an example of returning a pdf from a web api get. Want to serve a pdf file with dynamicallygenerated content. Since my old approach did not work anymore, i had to create something new. 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. 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. Here we will be returning a pdf file from the controller method. Yes, your mvc code can be a consumer of a webapi, but not the other way around. However, sometimes a problem will occur deep inside your code. Net web api controller can be created either in the normal asp.
Net cores controllers are unified now, so there isnt a controller and apicontroller base class. If youve been following along as weve created a basic. I have a web api project that is running on a server. 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.
At the end, you have a web api that can manage todo items stored in a database. Dependency injection properly works for regular apicontrollers, but you should derive your controllers from abpapicontroller, which provides several benefits and integrates better. However, i wanted to rewrite it using the tocsv extension method from my earlier post using app. The string controller is checked against class names when trying to extract controller types from your api assemblies. 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. Net core and attribute routing makes it dead easy to quickly build your api. The technical goal is to pass a url to the app service web app and get back a pdf.
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. This section explains how to add and use a pdf viewer control in your web. This tutorial teaches the basics of building a web api with asp. The html part of the view just creates a table with heading coming from the model. Actionresult offers the following benefits over the iactionresult type. Net community decided to merge the functionality of mvc and web api. But i dont want to call web api controllers controller. Net web api and retrieve some products data from the northwind database.
I can see how to do this with normal mvc controllers, but not web. Say you have a productcontroller that is concerned with crud operations on products, it might have a method like the below. After that element is the placeholder where the records returned from the api will be populated. Let me introduce the efmvc app, if you havent heard about efmvc. Efmvc is a simple app, developed as a reference implementation for demonstrating asp. In loadall function, we are calling apipersonaldetails url that will. Things you didnt know about action return types in asp. In this tutorial, im going to show you how to use angular to download a file from an authenticated asp. 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. We need to make sure the user is authenticated so anyone else going to the url wont have access to the file. Choose the right return type for webapi controllers. How to return a pdf from a web api application stack overflow. In fact, when discovering controllers, web api will require the following.
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. The trouble im having is sending the document back to a client mvc application. Net web api package we can also read we can refer to the official documentation create a sample web api controller. Multiple actions were found that match the request. Rightclick your controllers folder and select add, controller.
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. 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. Net web api such as routing, authorization and ownership. This overhead can be reduced by instructing marten to not perform deserialization and instead just return the json string as stored in postgresql. How to download files from authenticated web api end points. Recently i started a new api project for my company. I have added a datahelper class in models folder which i added which returns a list of persons. Net web api service created earlier in a tutorial i. In this blog post, i will write unit tests for a asp.
This makes sense since the two have always been very similar. With this project i decided to give the help files generator that microsoft created a try. This post explains the concerns behind the hierarchical resource structure in asp. For example, when we send the file type as pdf, service will return pdf. There is a web api shim to bring over old controllers for use in asp.
Frankly, a webapi controller returns nothing but data, never a view page. In this article, we are going to discuss how to return files pdf wordexcel from web api service. Now when i run that application and call the api using fiddler as. Web api is the perfect platform for building restful applications on the. In the previous blog post i demonstrated how to get started with the asp. Using azure app services to convert a web page to pdf. Net web api, mvc, viewmodels and formatters 10 april, 2012. Net mvc 4 project through the standard add controller dialog box.
It is a very efficient and lightweight technology to build restful web services in. The simplest web api controller can directly return the object in question. Now we have done all the necessary set up and added a controller for web api. It enables you to return a type deriving from actionresult or return a specific type. In the dialog box, name your controller moviecontroller and select the. Net core web api project in which we need to generate a pdf report.
Therefore if you are familiar with mvc then its not too difficult to get going with. The test itself has minimal boilerplate code, and it cleans up after itself. Overall it looks like it will meet the needs of the project. Net web api controller in the efmvc reference application. Net mvc 6 for handling requests, whether they end up returning data or views. I created a controller assembly containing all my controllers in webapi 2. Net core web api with various scenarios and came up with these tips for anyone out there wanting to do the same. Net mvc 4 beta release and in the process has changed a lot. Actually, the answer is as simple because its hardcoded into the web api source. This blog describes how to generate pdf s with asp. 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. 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. Once we imported the required packages we can add an apicontroller to our existing asp. For pdf file we need to use mimetype application pdf.
Another important parameter is the object value in the writetostreamasync method. Modify the routing to map to the api controller of pdfviewersample project as follows. Introduction web api has been around for some years now. Returning raw json data in web api with marten visual. The rest of this is the details on everything thats happened. 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. Net mvc action results and pdf content simple talk. Jamiekeeling opened this issue on mar 19, 2017 25 comments. The goal of the code in this post is to make these tests simple and readable. Now, we have web api service controller studentcontroller having get method taking id as parameter and returns a student against it. Lets model an api around a simple object or resource, a dog, and create a web api for it.
Returning only a subset of members in webapi baskis blog. Net web api by vickram ravichandran the csvmediatypeformatter on github makes it possible to support textcsv media type to the web api stack. Net web api exposes json data through a new type of controller called an api controller. It is supposed to return pdfs from two different kinds of sources. Exception handling in the key feature in making an application robust and secure. Here we will implement exception handling for the same asp. Loading web api controllers from other libraries when self.
1358 1030 665 808 1065 1523 433 1047 636 1212 1451 1122 1325 1149 1096 907 498 1525 1451 968 762 641 445 328 1409 481 1128 950 678