无法将类型为'NHibernate.Hql.Ast.HqlBitwiseAnd'的对象强制转换为'NHibernate.Hql.Ast.HqlBooleanExpression'

Question

我有以下代码段，其中我收到错误

using (var session = Database.OpenSession())
{
    var q = from x in session.Query<User>()
           where x.UserName == username & x.Password==EncodePassword(password)
            select x;
    if (q.Count() > 0)
     {
         result = true;
     }
}

在if语句中我收到错误

Unable to cast object of type 'NHibernate.Hql.Ast.HqlBitwiseAnd' to type 'NHibernate.Hql.Ast.HqlBooleanExpression'.

Answer 1

怎么样：

using (var session = Database.OpenSession())
{
    var q = from x in session.Query<User>()
           where x.UserName == username && x.Password==EncodePassword(password)
            select x;
    if (q.Count() > 0)
     {
         result = true;
     }
}

检查查询中的双＆符号，直接在where部分。