Slapper.AutoMapper 的使用

 

Slapper.AutoMapper 是專門將一資料集合，對應成巢狀式類別。
Slapper.AutoMapper 使用底線(_)去區分出巢狀式子資料。
Slapper.AutoMapper 常和 Dapper 配合使用。

演示範例如下
1.開一 .net core ConsoleApp 專案
2.安裝 Slapper.AutoMapper

$ Slapper.AutoMapper

3.於 Program.cs 填入以下程式碼範例

// 範例一
var dictionary = new Dictionary<string, object> {
    { "Id", 1 },
    { "FirstName", "Clark" },
    { "LastName", "Kent" }
};

var person = Slapper.AutoMapper.MapDynamic<Person>(dictionary);

Console.WriteLine($"Id:{person.Id} FirstName:{person.FirstName} LastName:{person.LastName}");



// 範例二
// Slapper.AutoMapper 使用底線(_)去區分出巢狀式子資料
var dic = new Dictionary<string, object>
                         {
                             { "CustomerId", 1 },
                             { "FirstName", "Bob" },
                             { "LastName", "Smith" },
                             { "Orders_OrderId", 1 },
                             { "Orders_OrderTotal", 50.50m },
                             { "Orders_OrderDetails_OrderDetailId", 1 },
                             { "Orders_OrderDetails_OrderDetailTotal", 25.00m }
                         };

var dic2 = new Dictionary<string, object>
                         {
                             { "CustomerId", 1 },
                             { "FirstName", "Bob" },
                             { "LastName", "Smith" },
                             { "Orders_OrderId", 1 },
                             { "Orders_OrderTotal", 50.50m },
                             { "Orders_OrderDetails_OrderDetailId", 2 },
                             { "Orders_OrderDetails_OrderDetailTotal", 25.50m }
                         };

var list = new List<IDictionary<string, object>> { dic, dic2 };

// 清 Slapper.AutoMapper 快取
Slapper.AutoMapper.Cache.ClearInstanceCache();

// 特別指定以什麼欄位值相同時，可視為同一筆資料
Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(Customer), new List<string> { "CustomerId", "FirstName", "LastName" });

var customers = (Slapper.AutoMapper.Map<Customer>(list) as IEnumerable<Customer>).ToList();
Console.WriteLine();



public class Person
{
    public int Id;
    public string FirstName;
    public string LastName;
}

public class Customer
{
    public int CustomerId;
    public string FirstName;
    public string LastName;
    public IList<Order> Orders;
}

public class Order
{
    public int OrderId;
    public decimal OrderTotal;
    public IList<OrderDetail> OrderDetails;
}

public class OrderDetail
{
    public int OrderDetailId;
    public decimal OrderDetailTotal;
}

參考資料：
Slapper.AutoMapper