c# - 将存储过程转换为 LINQ

Question

我正在使用 MVC3 并且仍在学习 LINQ。我在尝试将查询转换为 LINQ to Entities 时遇到一些问题。我想返回一个Json方法

我的存储过程

Create Procedure [dbo].[ResourceReports]
(
    @EmployeeID int
) 
as
begin
    select   p.projectName AS Projects,  count( b.[CreatedByID]) AS Bugs
    from [EmployeeDetails] e inner join [Bugs] b  on e.[EmployeId] = b.[CreatedByID]
    inner join Projects p on b.ProjectId = p.ProjectId
    where e.[EmployeId] = @EmployeeID   
    group by P.projectName
end 

我有一些表，我开始在 LINQ 中编写它，但我不确定如何正确返回正确的类型或强制转换它。

我的 Controller

public JsonResult Getchart()
{
    var Bug = db.Bugs.ToList<Bug>();
    var EmployeDetails = db.EmployeeDetails.ToList<EmployeeDetail>();
    var projects = db.Projects.ToList<Project>();

    var result = (from e in EmployeDetails 
                  join b in Bug on e.EmployeId equals b.CreatedByID
                  join p in projects on b.ProjectId equals p.ProjectId
                  where e.EmployeId = @EmployeId
                  group p.projectName
                  select new (p.projectName as Project ,count(b.CreatedByID) as Bug)).Take(50);

    return Json(result,JsonRequestBehavior.AllowGet);
}

如何传递参数进行查询，希望数据以json格式返回。

Answer 1

假设您可以将值作为参数传递给方法:

public JsonResult Getchart(int employeeId)
{
    var Bug = db.Bugs.ToList<Bug>();
    var EmployeeDetails = db.EmployeeDetails.ToList<EmployeeDetail>();
    var projects = db.Projects.ToList<Project>();

    var result = (from e in EmployeeDetails 
                  join b in Bug on e.EmployeeId equals b.CreatedByID
                  join p in projects on b.ProjectId equals p.ProjectId
                  where e.EmployeeId == employeeId   // <-- use the parameter here
                  group p by p.projectName into g
                  select new {
                     Project = g.Key,
                     Bug = g.Count() 
                     }
                 ).Take(50);
    return Json(result,JsonRequestBehavior.AllowGet);
}

顺便说一句，我特意纠正了Employee的一些拼写