排序列表，并使用LINQ所有的嵌套对象 [英] Sort a list and all its nested objects using Linq
问题描述
有是有几个部门的组织和每个部门都有一些员工。
我对象的结构是这样的：
There is an Organisation that has several departments and each department has some employees. My Object structure looks like this:
public class Organisation
{
public int Code { get; set; }
public string Type { get; set; }
public string Name { get; set; }
public List<Department> Departments { get; set; }
}
public class Department
{
public int Code { get; set; }
public string Name { get; set; }
public List<Employee> Employees { get; set; }
}
public class Employee
{
public int Code { get; set; }
public string Name { get; set; }
}
如果我有这些组织的名单，使用LINQ，我想实现的排序列表中的按编号及名称的所有组织，然后排序上的所有部门按编号及名称，然后通过代码和名称的所有雇员。下面是我已填充一些测试数据：
If I have a list of these organisations, using linq, I would like to implement sort on all the Organisations in the list by Code and Name and then sort on all the Departments by Code and Name and then on all the Employees by code and name. Below is some test data that I have populated:
var britishTelecomLtd = new Organisation
{
Code = 8,
Name = "British Telecom Ltd",
Type = "Institutional",
Departments = new List<Department>
{
new Department
{
Code = 6,
Name = "Finance",
Employees = new List<Employee>
{
new Employee
{
Code = 5,
Name = "Peter"
},
new Employee
{
Code = 2,
Name = "James"
},
new Employee
{
Code = 6,
Name = "Andrew"
}
}
},
new Department
{
Code = 5,
Name = "Accounts",
Employees = new List<Employee>
{
new Employee
{
Code = 15,
Name = "Jane"
},
new Employee
{
Code = 22,
Name = "John"
},
new Employee
{
Code = 16,
Name = "Mark"
}
}
}
}
};
var virginMediaLtd = new Organisation
{
Code = 5,
Name = "Virgin Media Ltd",
Type = "Institutional",
Departments = new List<Department>
{
new Department
{
Code = 6,
Name = "Sales",
Employees = new List<Employee>
{
new Employee
{
Code = 5,
Name = "Peter"
},
new Employee
{
Code = 2,
Name = "James"
},
new Employee
{
Code = 6,
Name = "Andrew"
}
}
},
new Department
{
Code = 5,
Name = "Support",
Employees = new List<Employee>
{
new Employee
{
Code = 15,
Name = "Jane"
},
new Employee
{
Code = 22,
Name = "John"
},
new Employee
{
Code = 16,
Name = "Mark"
}
}
}
}
};
var pcWorldLtd = new Organisation
{
Code = 18,
Name = "PC World Ltd",
Type = "Retail",
Departments = new List<Department>
{
new Department
{
Code = 6,
Name = "Marketing",
Employees = new List<Employee>
{
new Employee
{
Code = 15,
Name = "Jane"
},
new Employee
{
Code = 22,
Name = "John"
},
new Employee
{
Code = 16,
Name = "Mark"
}
}
},
new Department
{
Code = 5,
Name = "Customer Services",
Employees = new List<Employee>
{
new Employee
{
Code = 5,
Name = "Kelly"
},
new Employee
{
Code = 2,
Name = "Jenny"
},
new Employee
{
Code = 6,
Name = "Tricia"
}
}
}
}
};
var blueCatLtd = new Organisation
{
Code = 3,
Name = "Blue Cat Music Ltd",
Type = "Retail",
Departments = new List<Department>
{
new Department
{
Code = 6,
Name = "Sales",
Employees = new List<Employee>
{
new Employee
{
Code = 5,
Name = "Peter"
},
new Employee
{
Code = 2,
Name = "James"
},
new Employee
{
Code = 6,
Name = "Andrew"
}
}
},
new Department
{
Code = 5,
Name = "Warehouse",
Employees = new List<Employee>
{
new Employee
{
Code = 5,
Name = "Andy"
},
new Employee
{
Code = 2,
Name = "Robert"
},
new Employee
{
Code = 6,
Name = "Dave"
}
}
}
}
};
var organisations = new List<Organisation>
{
britishTelecomLtd,
virginMediaLtd,
pcWorldLtd,
blueCatLtd
};
下面我加入的数据字典
var legalEntitiesCollectionByType = new Dictionary<string, ICollection<Organisation>>
{
{
"Institutional", organisations
.Where(x => x.Type == "Institutional")
.OrderBy(x => x.Code).ThenBy(x => x.Name)
.ToList()
},
{
"Retail", organisations
.Where(x => x.Type == "Retail")
.OrderBy(x => x.Code).ThenBy(x => x.Name)
.ToList()
}
};
但正如你看到的排序只发生在组织层面，而不是在部门或员工水平？我的问题是如何实现对象层次排序在所有3个级别与在填充上面的字典？
but as you see the sorting is only happening on the Organisation level and not on the department or the employee level ? My question is how can I achieve sorting on all 3 levels with in the object hierarchy while populating the dictionary above ?
干杯
推荐答案
您需要做的，你回来，像这样（我将只显示零售的机构需要以同样的方式进行排序）：
You need to do all three levels of sorting inside the objects that you return, like this (I'll show only the "Retail", the "Institutional" needs to be sorted in the same way):
{
"Retail", organisations
.Where(x => x.Type == "Retail")
.OrderBy(x => x.Code).ThenBy(x => x.Name)
.Select(x => new Organisation {
x.Code
, x.Type
, x.Name
, Departments = x.Departmentsd.OrderBy(d => d.Code).ThenBy(d => d.Name)
.Select(d => new Department {
d.Code
, d.Name
, Employees = d.Employees.OrderBy(e => e.Code).ThenBy(e => e.Name).ToList()
})
}).ToList()
}
由于需要选择此多次，您可能希望一个方法来包装这个代码，并从几个景点使用它，就像这样：
Since you need to select this multiple times, you may want to wrap this code in a method, and use it from several spots, like this:
private Organisation SortedOrganisation(Organisation x) {
return new Organisation {
x.Code
, x.Type
, x.Name
, Departments = x.Departmentsd.OrderBy(d => d.Code).ThenBy(d => d.Name)
.Select(d => new Department {
d.Code
, d.Name
, Employees = d.Employees.OrderBy(e => e.Code).ThenBy(e => e.Name).ToList()
})
};
}
...
var legalEntitiesCollectionByType = new Dictionary<string, ICollection<Organisation>>
{
{
"Institutional", organisations
.Where(x => x.Type == "Institutional")
.OrderBy(x => x.Code).ThenBy(x => x.Name)
.Select(SortedOrganisation)
.ToList()
},
{
"Retail", organisations
.Where(x => x.Type == "Retail")
.OrderBy(x => x.Code).ThenBy(x => x.Name)
.Select(SortedOrganisation)
.ToList()
}
};
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