ExecuteStoreQuery将参数传递给SQL语句

Question

有没有人可以帮我把一个参数对象传给我的ExecuteStoreQuery。我从我的实体db中执行这个，然后动态创建我的过程，这是可能的，并且我的SQL是正确的。我需要将一个Id参数值传递给我的SQL语句。

var node = db.ExecuteStoreQuery<Node>(@"
    @Id int // not sure about this declaration for parameter    

    with c as (
        select Id, Name, ParentId,[0] as level
        from Department d
    union all
        select d.Id, d.Name, d.ParentId, [level] + 1
        from Department d
        join c on d.ParentId = c.Id)
    select * from c where c.Id = @Id"                                                         
"Departments", 
System.Data.Objects.MergeOption.NoTracking, 
new object{ Id: department.Id} // <--parameter object not working);               

Answer 1

根据MSDN documentation的说法，你的声明需要读起来更像这样：

var node = db.ExecuteStoreQuery<Node>(@"
    with c as (
        select Id, Name, ParentId,[0] as level
        from Department d
    union all
        select d.Id, d.Name, d.ParentId, [level] + 1
        from Department d
        join c on d.ParentId = c.Id)
    select * from c where c.Id = @Id"                                                         
"Departments", 
System.Data.Objects.MergeOption.NoTracking, 
new SqlParameter{ ParameterName = "id", Value = department.Id});