Some thing about Lambda Expression and NHB

LINQ体验(17)——LINQ to SQL语句之动态查询

  example:

代码

             using  (EmployeeDBDataContext db  =   new  EmployeeDBDataContext())
            {
               
                var l  =  db.VW_EMPLOYEEs;
                ParameterExpression param  =  Expression.Parameter( typeof (VW_EMPLOYEE),  " p " );
                Expression left  =  Expression.Property(param,  typeof (VW_EMPLOYEE).GetProperty( " EMPLID " ));
                Expression right  =  Expression.Constant(emp.EMPLID);
                Expression filter  =  Expression.Equal(left, right);
                Expression pred  =  Expression.Lambda(filter, param);
                Expression expr  =  Expression.Call( typeof (Queryable),  " Where " ,
                                                         new  Type[] {  typeof (VW_EMPLOYEE) },
                                                            Expression.Constant(l), pred);
                IQueryable < VW_EMPLOYEE >  query  =  db.VW_EMPLOYEEs.AsQueryable().Provider.CreateQuery < VW_EMPLOYEE > (expr);
                 return  query.ToList();
            }

  

Lambda :

http://www.cnblogs.com/killuakun/archive/2008/08/03/1259389.html

 

http://www.cnblogs.com/terrylee/archive/2008/08/01/custom-linq-provider-part-1-expression-tree.html

 

http://www.cnblogs.com/ninputer/archive/2009/08/28/expression_tree1.html

 

http://www.cnblogs.com/126/archive/2007/08/15/857193.html

   

http://www.cnblogs.com/lyj/archive/2008/03/25/1122157.html

 

Lambda Expression Tree: 

打造自己的LINQ Provider（上）：Expression Tree揭秘

打造自己的LINQ Provider（中）：IQueryable和IQueryProvider

 

Linq To Sql进阶系列（六）用object的动态查询与保存log篇

 

Expression Tree上手指南 （一） ==>

 

NHB

http://www.kontac.net/site/

http://www.cnblogs.com/lyj/archive/2008/11/10/1330542.html