c# - 如何将部分视图数据分配给 C# MVC 中的模型？

Question

我正在使用 MVC C# 和实体框架工作。

所以在我的部分观点中，我想更改数据。

这是我的控制器

public ActionResult BusinessDetails(){               
    int bsId = bskey ?? default(int);
    var BusinessQuery = GetBusinessById(bsId);    
    var PeopleQuery = BusinessQuery.t_PEOPLE
                        .Where(p => p.PP_IS_CONTACT == true).AsEnumerable();

    var peopleCollection = new EntityCollection<t_PEOPLE>();

    foreach (var m in PeopleQuery)
    {
        //This is problem.-----------
        peopleCollection.Add(m);
    }    //--------------

    BusinessQuery.t_PEOPLE = peopleCollection;    
    return PartialView("_EditBusiness", BusinessQuery);
    }                    

    return RedirectToAction("Index");              
}


public t_BUSINESS GetBusinessById(int id){
    if (id == 0)
        return null;

    var query = from b in db.t_BUSINESS
                where b.BS_KEY == id
                select b;
    var Business = query.FirstOrDefault();
    return Business;
}

那么如何将 分配PeopleQuery给我的BusinessQuery.t_PEOPLE.

有错误并说

The object could not be added to the EntityCollection or EntityReference. An object that is attached to an ObjectContext cannot be added to an EntityCollection or EntityReference that is not associated with a source object

Answer 1

您可以直接查询您要查找的记录：

public ActionResult BusinessDetails()
{               
    int bsId = bskey ?? default(int);
    var business = GetContactBusinessById(bsId);    
    return PartialView("_EditBusiness", business);
}

public t_BUSINESS GetContactBusinessById(int id)
{
    if (id == 0)
    {
        return null;
    }

    var query = 
        from b in db.t_BUSINESS
        from p in b.t_PEOPLE
        where b.BS_KEY == id && p.PP_IS_CONTACT
        select b;

    return query.FirstOrDefault();
}

Answer 2

尝试这个

var PeopleQuery = BusinessQuery.t_PEOPLE.Where(p => p.PP_IS_CONTACT == true).ToList();