MongoRepository

起步

现在已经非常擅长使用Repository方式开发关系数据库的程序了，但是在使用Nosql如Mongo的时候，更多的是使用Mongo Driver，无意中看到了MongoRepository，允许了以Repository的方式去开发使用Mongo了。

1.新建项目通过NuGet 引入MongoRepository ；

2.我们使用的是Console application新建一个App.config,添加如下信息：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="MongoServerSettings"
         connectionString="mongodb://localhost/SampleProject" />
  </connectionStrings>
</configuration>

这里保证了程序连接到我们的名字为：SampleProject的Mongo上，如果不存在SampleProject系统则会自动帮助我们创建SampleProject。

定义业务模型

建立业务model集成Entity，这样程序会见Model文件对应到Mongo之中，创建Customer及product：

using System.Collections.Generic;
using MongoRepository;

public class Customer : Entity  //Inherit from Entity!
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public List<Product> Products { get; set; }

    public Customer()
    {
        this.Products = new List<Product>();
    }
}

public class Product //No need to inherit from Entity; This object is not contained in
                     //it‘s "own" MongoDb document. It is only contained in a customer
{
    public string Name { get; set; }
    public decimal Price { get; set; }
}

程序会自动为每个继承自Entity的model创建一个string类型的属性：Id。

如何使用

建立连接，定义model之后就可以以Repository的方式使用Mongo了。

using System;
using System.Linq;
using MongoRepository;

class Program
{
    static MongoRepository<Customer> customerrepo = new MongoRepository<Customer>();

    static void Main(string[] args)
    {

        //Add customers
        var john = new Customer() { FirstName = "John", LastName = "Doe" };
        var jane = new Customer() { FirstName = "Jane", LastName = "Doe" };
        var jerry = new Customer() { FirstName = "Jerry", LastName = "Maguire" };
        customerrepo.Add(new[] { john, jane, jerry });

        //Show contents of DB
        DumpData();

        //Update customers
        john.FirstName = "Johnny";  //John prefers Johnny
        customerrepo.Update(john);

        jane.LastName = "Maguire";  //Jane divorces John and marries Jerry
        customerrepo.Update(jane);

        //Delete customers
        customerrepo.Delete(jerry.Id);  //Jerry passes away

        //Add some products to John and Jane
        john.Products.AddRange(new[] {
                new Product() { Name = "Fony DVD Player XY1299", Price = 35.99M },
                new Product() { Name = "Big Smile Toothpaste", Price = 1.99M }
        });
        jane.Products.Add(new Product() { Name = "Life Insurance", Price = 2500 });
        customerrepo.Update(john);
        customerrepo.Update(jane);
        //Or, alternatively: customerrepo.Update(new [] { john, jane });

        //Show contents of DB
        DumpData();

        //Finally; demonstrate GetById and First
        var mysterycustomer1 = customerrepo.GetById(john.Id);
        var mysterycustomer2 = customerrepo.First(c => c.FirstName == "Jane");

        Console.WriteLine("Mystery customer 1: {0} (having {1} products)",
                mysterycustomer1.FirstName, mysterycustomer1.Products.Count);
        Console.WriteLine("Mystery customer 2: {0} (having {1} products)",
                mysterycustomer2.FirstName, mysterycustomer2.Products.Count);

        //Delete all customers
        customerrepo.DeleteAll();

        //Halt for user
        Console.WriteLine("Press any key...");
        Console.ReadKey();
    }

    private static void DumpData()
    {
        //Print all data
        Console.WriteLine("Currently in our database:");
        foreach (Customer c in customerrepo)
        {
            Console.WriteLine("{0}\t{1}\t has {2} products",
                c.FirstName, c.LastName, c.Products.Count);
            foreach (Product p in c.Products)
                Console.WriteLine("\t{0} priced ${1:N2}", p.Name, p.Price);
            Console.WriteLine("\tTOTAL: ${0:N2}", c.Products.Sum(p => p.Price));
        }
        Console.WriteLine(new string(‘=‘, 50));
    }
}

执行结果：

Currently in our database:
John    Doe      has 0 products
        TOTAL: $0,00
Jane    Doe      has 0 products
        TOTAL: $0,00
Jerry   Maguire  has 0 products
        TOTAL: $0,00
==================================================
Currently in our database:
Jane    Maguire  has 1 products
        Life Insurance priced $2.500,00
        TOTAL: $2.500,00
Johnny  Doe      has 2 products
        Fony DVD Player XY1299 priced $35,99
        Big Smile Toothpaste priced $1,99
        TOTAL: $37,98
==================================================
Mystery customer 1: Johnny (having 2 products)
Mystery customer 2: Jane (having 1 products)
Press any key...

文件下载：http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=mongorepository&DownloadId=894208&FileTime=130528383908000000&Build=20941