从复杂对象中过滤 ASP.NET MVC JsonResult 中的 Json

发布于 2024-09-30 06:19:18 字数 547 浏览 4 评论 0原文

我试图从数据模型中的复杂对象（Json）发布，不幸的是，我不想传递所有层次结构（人->HasMany Orders/ Orders HasMany Products 等），而只想传递“第一级”（例如网格视图的人名）。

public JsonResult Search(string fMname, string fSname)
{
IList<Person> people = personRepository.FindAllMatchingName(fMname, fSname);
//Here with lazy loading querying only the “first level” for object
var data = people;
return Json(new { items = data });
//Here querying full object hierarchy and return the big Json
}

我正在寻找一种解决方案来过滤 Json 对象，并且——如果可能的话——进行延迟加载并避免 sql 开销。

有什么想法吗？

原文

I am trying to post from a complex object from data model, a Json, unfortunately, I don’t want to pass all the hierarchy (person->HasMany Orders/ Orders HasMany Products etc.) but only the “first level” (for example person names for a grid view).

public JsonResult Search(string fMname, string fSname)
{
IList<Person> people = personRepository.FindAllMatchingName(fMname, fSname);
//Here with lazy loading querying only the “first level” for object
var data = people;
return Json(new { items = data });
//Here querying full object hierarchy and return the big Json
}

I am looking for a solution to filter the Json object and – if this is possible – to work the lazy loading and to avoid the sql overhead.

Any ideas?

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遗失的美好 2024-10-07 06:19:18

创建一个简化的人员类，仅包含您需要的属性。然后使用Linq将Person的IList转换为简化类型的列表。

public class SimplePerson
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

public JsonResult Search(string fMname, string fSname)
{
    IList<Person> people = personRepository.FindAllMatchingName(fMname, fSname);
    var data = people.Select(m => new SimplePerson() { FirstName = m.FirstName, LastName = m.LastName }).ToList();
    return Json(new { items = data });
}

您可以改用匿名类型，但它不会在视图中强类型化。

Create a simplified person class that only contains the properties you need. Then transform the IList of Person into a list of the simplified type using Linq.

public class SimplePerson
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

public JsonResult Search(string fMname, string fSname)
{
    IList<Person> people = personRepository.FindAllMatchingName(fMname, fSname);
    var data = people.Select(m => new SimplePerson() { FirstName = m.FirstName, LastName = m.LastName }).ToList();
    return Json(new { items = data });
}

You could use an anonymous type instead, but it wouldn't be strongly typed in the view.

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