Building Web API using MVC 6 & MongoDB

jieforest

1. public void Configure(IApplicationBuilder app)  
   
2.     {
   
3.         // Setup configuration sources
   
4.         var configuration = new Configuration();
   
5.         configuration.AddJsonFile(“config.json”);
   
6.         configuration.AddIniFile(“config.ini”);
   
7.         configuration.AddXmlFile(“config.xml”);
   
8.         configuration.AddEnvironmentVariables();
   
9. 
   
10.         // …
    
11.     }
    

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jieforest

Accessing the values

1. var configuration = new Configuration();  
   
2. configuration.AddJsonFile("config.json);  
   
3. configuration.Get("key");  

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A couple notes concerning configuration:
1）order matters, last one wins
2）not just a key/value pair. Complex structures supported

So how does this apply to this project? Let's add it to the Startup.cs.

jieforest

Add the following to constructor

1. public Startup()  
   
2. {
   
3.     Configuration = new Configuration()
   
4.         .AddJsonFile("config.json")
   
5.         .AddEnvironmentVariables();
   
6. }
   

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jieforest

Next, add the IConfiguration interface so we can take advantage of DI

1. public IConfiguration Configuration { get; set; }  

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Another new item we have is the the IOptions interface which allows us to bind the configuration file to a class. This is available in the Microsoft.Framework.OptionsModel namespace. Given that, let's create a new class call Settings.cs to hold the values from the config.json file we'll be creating shortly.

1. public class Settings  
   
2. {
   
3.     public string Database { get; set; }
   
4.     public string MongoConnection { get; set; }
   
5. }
   

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jieforest

now create the config.json file

1. {
   
2.     "mongoconnection": "mongodb://localhost:27017",
   
3.     "database":  "mongomvc"
   
4. }
   

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Now, add the code to the ConfigureServices() method

First, change the services.AddMvc() to include our configuration

1. services.addMvc(Configuration)  

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jieforest

now add this line to configure the settings to be configured and bind based on the configuration

1. services.Configure<Settings>(Configuration);  

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Now that the application is bootstrapped for Configuration, Dependency Injection, JSON formatting; let's get the datastore setup in MongoDB and then we'll come back to round out the app with the Controller, Model and DataRepository.

jieforest

MongoDB

There are a few reasons I chose MongoDB for this example.

1）its a popular NoSQL datastore

2）has a nuget package for C#

3）supported on Azure

4）equal tooling support on OSX and Windows.

jieforest

Installation

Installation is a breeze. If you are on OSX you can use HomeBrew to install by executing $ brew install mongodb, and if you are using Windows I would highly suggest using Chocolately to do the installation. Chocolately installs MongoDB, the shell and the Windows service and is equivalent to the OSX install with HomeBrew.

1. > choco install mongodb

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Tools

If you prefer GUI interfaces, the best one I have found is RoboMongo. It is cross platform and provides a great way to explore your collections. You can also connect to you local stores as well as remote stores such as MongoLab(Azure provider).