将此Linq查询从查询​​语法转换为lambda表达式

Question

我不确定我喜欢linq查询语法......它只是不是我的偏好。但我不知道这个查询使用lambda表达式的样子，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，这使得这种额外的混淆。

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)