[英]LINQ filter list based on property value and filter the properties as well
My NavigationItem
has navigation property NavigationItemsPermissions
where I have RoleId
. 我的
NavigationItem
具有导航属性NavigationItemsPermissions
,其中我具有RoleId
。 As input parameter in function I have List<int> roleIds
where I will have something like {1, 3}. 作为函数中的输入参数,我具有
List<int> roleIds
,其中将有类似{1,3}的内容。
How do I finish my LINQ
to give me back NavigationItem
(s) that has NavigationItemsPermissions
with some RoleId
on the input list. 我如何完成我的
LINQ
给我回NavigationItem
(s)表示,有NavigationItemsPermissions
一些 RoleId
输入列表中。 Note that, additionally, I want only those NavigationItemsPermissions
with RoleId
from the input list. 请注意 ,此外,我只需要输入列表中带有
RoleId
那些NavigationItemsPermissions
。
Here is where I'm stuck at 这是我坚持的地方
public List<NavigationItem> GetNavigationItems(MenuType menuType, List<int> roleIds)
{
var navigationItems = DbContext.NavigationItems.Where(x => x.MenuTypeId == (int) menuType && !x.IsDeleted && x.NavigationItemsPermissions.Any(r=>r.RoleId **in roleIds**)));
return navigationItems;
}
To give a simpler analogy (not real data), if there is a list of developers 如果有开发人员列表,则给出一个简单的类比(不是真实数据)
developers: [
{ name: "Hickory", skills: ["c#", "js", "linq"] }
{ name: "Dickory", skills: ["html", "css", "js"] }
{ name: "Dock", skills: ["html", "c#", "oracle"] }
]
And a given list of skills list = [ "c#", "linq" ]
, I want the following as result 和给定的技能
list = [ "c#", "linq" ]
,我希望得到以下结果
[{ name: "Hickory", skills: ["c#", "linq"] }
{ name: "Dock", skills: ["c#"] }]
Sample real data: 实际数据样本:
Thank you for any help. 感谢您的任何帮助。
you can use contains
in this case 在这种情况下,您可以使用
contains
public List<NavigationItem> GetNavigationItems(MenuType menuType, List<int> roleIds)
{
var navigationItems = DbContext.NavigationItems.Where(x => x.MenuTypeId == (int) menuType && !x.IsDeleted && roleIds.contains(x.RoleId)));
return navigationItems;
}
This should give you the desired result 这应该给您想要的结果
public List<NavigationItem> GetNavigationItems(MenuType menuType, List<int> roleIds)
{
var navigationItems = DbContext.NavigationItems
.Where(x => x.MenuTypeId == (int) menuType &&
!x.IsDeleted &&
x.NavigationItemsPermissions.Any(r => roleIds.Contains(r.RoleId)));
return navigationItems;
}
Edit 编辑
If you " only need NavigationItemsPermissions where NavigationItemsPermissions.RoleId is in roleIds" , you can use this query 如果“仅需要NavigationItemsPermissions.RoleId在roleIds中的NavigationItemsPermissions” ,则可以使用此查询
var navigationPermissions = DbContext.NavigationItems
.Where(x => x.MenuTypeId == (int) menuType &&
!x.IsDeleted)
.SelectMany(ni => ni.NavigationItemsPermissions)
.Where(np => roleIds.Contains(np.RoleId))
.ToList();
Use Distinct()
before ToList()
if there are repeated items and you want only distinct items. 如果有重复的项目并且只需要不同的项目,请在
ToList()
Distinct()
之前使用Distinct()
。
Edit 2 编辑2
var navigationItems = DbContext.NavigationItems
.Where(x => x.MenuTypeId == (int) menuType &&
!x.IsDeleted &&
x.NavigationItemsPermissions.Any(r => roleIds.Contains(r.RoleId)));
navigationItems.ForEach(x => x.NavigationItemsPermissions = x.NavigationItemsPermissions.Where(r => roleIds.Contains(r.RoleId)).ToList());
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