dynamic-linq-core

问题 I have a data table result and I converted it to Enumerable using AsEnumerable extension. var dataTableToEnumerable = dataTable.AsEnumerable(); Now Im doing a groupBy on it using Linq Dynamic Extensions and it works fine but I cant process Select() , Sum() , Min() etc on the aggregrated result. But methods like Count(),First(),FirstOrDefault() exist. dataTableToEnumerable.AsQueryable().Where("(it[\"yoko\"] != null&&it[\"price\"] != null)") .GroupBy("new(it[\"proposalid\"] as proposalid,it[\

问题 I have an ad-hoc reporting system; I have no compile-time knowledge of the source type of queries or of the required fields. I could write expression trees at runtime using the System.Linq.Expressions.Expression factory methods, and invoke LINQ methods using reflection, but Dynamic LINQ is a simpler solution. The reporting system is to allow for queries which returns the result of a LEFT JOIN. There are fields in the joined table which are NOT NULL in the database; but because this is a LEFT

问题 I have an ad-hoc reporting system; I have no compile-time knowledge of the source type of queries or of the required fields. I could write expression trees at runtime using the System.Linq.Expressions.Expression factory methods, and invoke LINQ methods using reflection, but Dynamic LINQ is a simpler solution. The reporting system is to allow for queries which returns the result of a LEFT JOIN. There are fields in the joined table which are NOT NULL in the database; but because this is a LEFT