摘要： http://www.cnblogs.com/blusehuang/archive/2007/07/13/816970.html ParameterExpression c = Expression.Parameter(typeof(Customer), "c"); Expression condition = Expression.Constant(True); if(srtring.sinullorempty(S)){ Expression con = Expression.Call( Expression.Property(c, typeof(Customer).G. 阅读全文