c# - ExecuteStoreQuery 将参数传递给 SQL 语句

Question

有人可以帮助将参数对象传递到我的 ExecuteStoreQuery 中吗？我正在从我的 Entities 数据库执行此操作，然后动态创建我的过程是可能的并且我的 SQL 是正确的。我需要将 Id 参数值传递到我的 SQL 语句中

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 ，您的声明需要更像:

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});