将此 Linq 查询从查询语法转换为 lambda 表达式

发布于 2024-09-02 04:56:51 字数 412 浏览 1 评论 0原文

我不确定我喜欢 linq 查询语法...这不是我的偏好。但我不知道使用 lambda 表达式这个查询会是什么样子，有人可以帮忙吗？

from securityRoles in user.SecurityRoles
from permissions in securityRoles.Permissions
where permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read"
orderby permissions.PermissionLevel.Value descending
select permissions

用户和安全角色之间存在多对多的关系，这使得这更加令人困惑。

谢谢！凯莉

原文

I'm not sure I like linq query syntax...its just not my preference. But I don't know what this query would look like using lambda expressions, can someone help?

from securityRoles in user.SecurityRoles
from permissions in securityRoles.Permissions
where permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read"
orderby permissions.PermissionLevel.Value descending
select permissions

There is a many-to-many relationship between users and security roles that makes this extra confusing.

Thanks!
Kelly

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神魇的王 2024-09-09 04:56:51

像这样：

user.SecurityRoles.SelectMany(securityRoles => securityRoles.Permissions)
                  .Where(permissions => permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read")
                  .OrderByDescending(permissions => permissions.PermissionLevel.Value)

Like this:

user.SecurityRoles.SelectMany(securityRoles => securityRoles.Permissions)
                  .Where(permissions => permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read")
                  .OrderByDescending(permissions => permissions.PermissionLevel.Value)

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北斗星光 2024-09-09 04:56:51

        user.SecurityRoles.SelectMany(securityRoles => securityRoles.Permissions,
                                      (securityRoles, permissions) => new {securityRoles, permissions}).Where(
            @t => permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read").OrderByDescending(
            @t => permissions.PermissionLevel.Value).Select(@t => permissions)

        user.SecurityRoles.SelectMany(securityRoles => securityRoles.Permissions,
                                      (securityRoles, permissions) => new {securityRoles, permissions}).Where(
            @t => permissions.SecurableEntity.Name == "Unit" && permissions.PermissionType.Name == "Read").OrderByDescending(
            @t => permissions.PermissionLevel.Value).Select(@t => permissions)

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~没有更多了~