linq 实现动态 orderby

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class Pet { public string Name{get;set;} public int Age{get;set;} } void Main() { Pet[] pets = { new Pet { Name="Tim", Age=18 }, new Pet { Name="Allen", Age=22 }, new Pet { Name="Bill", Age=20 } }; //如果我们想根据Age进行排序 很容易想到这样来写: var query= from p in pets orderby p.Age select p; query.ToList().ForEach(q=>Console.WriteLine(q.Name +" "+q.Age)); /* 得到结果: Tim 18 Bill 20 Allen 22 */ } //但是有时项目内有多个排序条件 如有时要根据Name排序 有时要根据Age排序 何问起 hovertree.com //这时我们就要用到动态排序: void Main() { Pet[] pets = { new Pet { Name="Tim", Age=18 }, new Pet { Name="Allen", Age=22 }, new Pet { Name="Bill", Age=20 } }; Console.WriteLine("Before Orderby:/r/n"); pets.ToList().ForEach(p=>Console.WriteLine(p.Name +" "+p.Age)); var query= from p in pets orderby GetPropertyValue(p,"Age") select p; Console.WriteLine("/r/nAfter Orderby:/r/n"); query.ToList().ForEach(q=>Console.WriteLine(q.Name +" "+q.Age)); /* Before Orderby: Tim 18 Allen 22 Bill 20 After Orderby: Tim 18 Bill 20 Allen 22 */ } /* 何问起 hovertree.com */private static object GetPropertyValue(object obj, string property) { System.Reflection.PropertyInfo propertyInfo=obj.GetType().GetProperty(property); return propertyInfo.GetValue(obj, null); } 

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