小编Mur*_*uga的帖子

如何在LINQ TO SQL中使用union all.我使用以下代码进行联合,然后如何将此用于union all？

List<tbEmployee> lstTbEmployee = obj.tbEmployees.ToList();
List<tbEmployee2> lstTbEmployee2 = (from a in lstTbEmployee
                                    select new tbEmployee2
                                    {
                                        eid = a.eid,
                                        ename = a.ename,
                                        age = a.age,
                                        dept = a.dept,
                                        doj = a.doj,
                                        dor = a.dor

                                    }).Union(obj.tbEmployee2s).ToList();

我需要将linq查询结果转换为列表.我尝试了以下代码:

var qry = from a in obj.tbCourses
                     select a;

List<course> lst = new List<course>();
lst = qry.ToList();

上面的代码发生以下错误:

Cannot implicitly convert type 
System.Collections.Generic.List<Datalogiclayer.tbcourse> to
System.Collections.Generic.List<course>

请提及(大)ORM和微ORM之间的区别.微ORM比大ORM有什么优势.例如.实体框架ORM和精巧的微型ORM之间的区别.

我是.NET的oauth和owin的初学者.我试图了解这些方法的ValidateClientAuthentication方法和GrantResourceOwnerCredentials方法.我了解GrantResourceOwnerCredentials方法可用于验证凭据并生成令牌.然后,方法ValidateClientAuthentication()的目的是什么.请指导我这件事.非常感谢.

 public override Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            return Task.Factory.StartNew(() =>
            {
                var userName = context.UserName;
                var password = context.Password;
                var userService = new UserService(); // our created one
                var user = userService.ValidateUser(userName, password);
                if (user != null)
                {
                    var claims = new List<Claim>()
                    {
                        new Claim(ClaimTypes.Sid, Convert.ToString(user.Id)),
                        new Claim(ClaimTypes.Name, user.Name),
                        new Claim(ClaimTypes.Email, user.Email)
                    };
                    ClaimsIdentity oAuthIdentity = new ClaimsIdentity(claims,Startup.OAuthOptions.AuthenticationType);


                    var properties = CreateProperties(user.Name);
                    var ticket = new AuthenticationTicket(oAuthIdentity, properties);
                    context.Validated(ticket);
                }
                else
                {
                    context.SetError("invalid_grant", "The user name or password is …