使用 c# 在 json 中获取分层输出 --> asp.net web api

Question

我想使用 C#(ASP.NET Web Api) 在 JSON 输出中创建员工和经理的层次结构树。我使用了 EntityFramework。

我得到的api代码是-

[Route("empLevel/{id}")]
public IActionResult GetEmpHierarchy(int id)
{
    try
    {
        if (id == 0)
        {
            return NotFound();
        }
        var query_hierarchy = entity.EmployeeHierarchies.FromSqlInterpolated($"EXECUTE dbo.FindHierarchy {id}").ToList();
        
        return Ok(query_hierarchy);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.StackTrace);
    }
    return NotFound();
}

class EmployeeHierarchy 的代码是-

public class EmployeeHierarchy
    {

            public int Id { get; set; }
            public int? MngId { get; set; }
            public string Path { get; set; }
            public string Name { get; set; }
            public string FullPath { get; set; }
            public int Level { get; set; }
            public double Grade { get; set; }
    }

我在从数据库获取输出的过程中使用了 CTE，它是-

ALTER PROCEDURE [dbo].[FindHierarchy]
@empId int = null
AS
BEGIN
    with cte as(
                select Id, MngId, CAST('' AS VARCHAR(40)) ManagerName, Path = cast('' as varchar(40)),Name, Level = 0,Grade       
                from Employee    
                where MngId is null

                union all 

                select EmpId     =  e.Id, ParentId  =  e.MngId,
                        CAST(cte.Name AS VARCHAR(40)) ManagerName,
                        Path      =  cast(concat(cte.Path, cte.Name, ' -› ') as varchar(40)),
                        Name      =  e.Name,        
                        Level     =  cte.Level + 1,
                        Grade = e.Grade
                    from 
                        Employee e
                        inner join cte on cte.Id = e.MngId
            )
                select 
                    Id      ,
                    MngId  ,
                    ManagerName,
                    Path       ,
                    Name       ,
                    FullPath   =  Path + Name,    
                    Level, Grade        
                from cte where ID=@empId
                order by FullPath   ;
END

目前我的输出是：

[
   {
      "id":2,
      "mngId":3,
      "name":"Blake",
      "fullPath":"Diana › Chelsa › Blake",
      "level":2,
      "grade":3.2
   }
]

我想显示为-

    [
   {
      "id":2,
      "mngId":3,
      "name":"Diana",
      "level":2,
      "grade":5.2[
         {
            "id":2,
            "mngId":3,
            "name":"Chelsa",
            "level":2,
             "grade":5.1[
               {
                  "id":2,
                  "mngId":3,
                  "name":"Diana",
                  "level":2,
                  "grade":3.2[]
                }
             ]
        }
    ]  
  }
]

我是 asp.net 网络 api 的新手，请为我的查询提供一些代码。谢谢！！

Answer 1

您的员工层次结构应如下所示

public class EmployeeHierarchy
{

        public int Id { get; set; }
        public int? MngId { get; set; }
        public string Path { get; set; }
        public string Name { get; set; }
        public string FullPath { get; set; }
        public int Level { get; set; }
        public double Grade { get; set; }
        public EmployeeHierarchy ChildEmployee { get; set; }
}

这是我能看到的唯一方法。您必须编辑您的 SQL 以匹配此型号。

使用 c# 在 json 中获取分层输出 --> asp.net web api

get hierarchical output in json using c# --> asp.net web api

c#

json

entity-framework

get

asp.net-web-api