在业务逻辑层中，我创建了一个像这样的类:

public List<roleHasRight> SelectAllData()
{
    try
    {
        return (from obj in Data.roleHasRights
                 join role in Data.roles on obj.FK_roleId equals role.roleId
                 select new
                 {
                     obj,
                     role.roleName
                 }).ToList();
    }
    catch
    {
        return null;
    }
}

Cannot implicitly convert type System.Linq.IQueryable < AnonymousType#1>' to 'System.Linq.IQueryable < spaBL.roleHasRight>'

最佳答案

您正在使用以下方法创建新的匿名类型:

select new { obj,role.roleName}

public class RoleHasRightInfo {
   public string Rolename {get;set;}
   public roleHasRight Right {get;set;}

}

select new RoleHasRightInfo(){ Right=obj,Rolename = role.roleName}

public List<RoleHasRightInfo> SelectAllData() {
...
}

https://stackoverflow.com/questions/11358200/