Some thing about Lambda Expression and NHB

本文主要是介绍Some thing about Lambda Expression and NHB，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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