linq - 将此 Linq 查询从查询​​语法转换为 lambda 表达式

Question

我不确定我是否喜欢 linq 查询语法……这不是我的偏好。但是我不知道这个查询使用 lambda 表达式会是什么样子，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！凯利

Answer 1

像这样：

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

Answer 2

        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)