Question

如何将Linq查询的结果分配给字典...

 public Dictionary<string, Privilege> GetAllPermissionsByGroupId(string groupid)
    {

        string[] Roles = new string[] { "e8b08a45-9cb5-4ac9-8c6c-9dfe4ac23966$Moderator" };

        List<RolePrivilege> RoleList = new List<RolePrivilege>();
        List<Privilege> PrivilegeList = new List<Privilege>();

        Dictionary<string, RolePrivilege> Role = PrivilegeProxy.GetPrivilegesForRoles("744A2BE3-846E-4E4A-9796-DAF9C743E8FF", Roles);
        RoleList = Role.Values.ToList();


        Dictionary<string, Privilege> Privilege = PrivilegeProxy.GetPrivilegesbyModuleIds(new string[] { "Groups" });
        PrivilegeList = Privilege.Values.ToList();

        var identicalQuery = from roles in RoleList
                            join privileges in PrivilegeList on roles.PrivilegeName equals privileges.Name
                           select new { Roles = roles, Privileges = privileges };


        Dictionary<string, Privilege> Result=new Dictionary<string,Privilege>();
         Result=?


         return Result;

    }

Answer 1

实际上，您的代码并未说明您希望将其放入字典中。什么应该是关键？与RolePrivilege关联的字符串？

没关系，我建议你在词典中使用对而不是值：

var Roles = new string[] { "e8b08a45-9cb5-4ac9-8c6c-9dfe4ac23966$Moderator" };
Dictionary<string, RolePrivilege> Role = PrivilegeProxy.GetPrivilegesForRoles("744A2BE3-846E-4E4A-9796-DAF9C743E8FF", Roles);
Dictionary<string, Privilege> Privilege = PrivilegeProxy.GetPrivilegesbyModuleIds(new string[] { "Groups" });

var identicalQuery = from roles in Role
                     join privileges in Privilege on roles.Value.PrivilegeName equals privileges.Value.Name
                     select new { Roles = roles, Privileges = privileges };

Dictionary<string, Privilege> Result = identicalQuery.ToDictionary(_ => _.Roles.Key, _.Privileges.Value);

<强> EDITED

好的，让我们想象两个词典的内容：

角色dic = [{“aaa”，RolePrivilege1}，{“bbb”，RolePrivilege2}，{“ccc”，RolePrivilege3}]
Privilege dic = [{“aaa”，Privilege5}，{“bbb”，Privilege6}，{“ddd”，Privilege7}]

您对输出的期望是什么？我想你想要下一个顺序：

结果= [{“aaa”，Privilege5}，{“bbb”，Privilege6}]

正确？如果是，此请求将有所帮助：

        var Result = Role
            .Join(Privilege,
                outer => outer.Key,
                inner => inner.Key,
                (outer, inner) => new { Str = outer.Key, Privilege = inner.Value })
            .ToDictionary(_ => _.Str, _ => _.Privilege);

Answer 2

您可能正在寻找Enumerable.ToDictionary()，但我只能猜测您正在尝试做什么......

var query = from employee in employees
            join privilege in privileges
              on employee.PrivilegeName equals privilege.Name
            select new
            {
                Employee = employee,
                Privilege = privilege
            };

var dictionary = query.ToDictionary(o => o.Employee);

您的变量令人困惑，因为employeeA的类型为RolePrivilege而employeeB的类型为Privilege。此外，最好是在ID而不是名称上进行连接（如果可能的话）。

也许这个问题会有所帮助：
Linq-to-SQL ToDictionary()

如何将LINQ查询值分配给另一个字典

2 个答案: