在lambda表达式中使用string作为属性c＃[duplicate](Use string as a property in lambda expression c# [duplicate])

这个问题在这里已有答案：

使用C＃ 21答案中的反射从字符串中获取属性值

我有一个方法，我传递字符串和列表。我想要实现的是将字符串转换为lambda表达式属性。

private someMethod(string myTypeString, List<Values> typeList) { foreach(var type in typeList.Where(x => x."myTypeString" > DateTime.Now)) { //do my loop } }

有没有办法做到这一点？

This question already has an answer here:

Get property value from string using reflection in C# 22 answers

I have a method which I pass string and a list in to. What I'm trying to achieve is to convert the string into lambda expression property.

private someMethod(string myTypeString, List<Values> typeList) { foreach(var type in typeList.Where(x => x."myTypeString" > DateTime.Now)) { //do my loop } }

Is there a way to do that?

最满意答案

您可以尝试使用Reflection ：

using System.Reflection; ... private void someMethod(string myTypeString, List<Values> typeList) { PropertyInfo pi = typeof(Values) .GetProperty(myTypeString, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | // private/internal/protected System.Reflection.BindingFlags.Public); // property exists, can be read and returns DateTime if (null == pi) return; // or throw exception else if (!pi.CanRead) return; // or throw exception else if (pi.PropertyType != typeof(DateTime)) return; // or throw exception foreach(var type in typeList .Where(x => (DateTime) (pi.GetValue(x, null)) > DateTime.Now)) { //do my loop } }

You can try using Reflection:

using System.Reflection; ... private void someMethod(string myTypeString, List<Values> typeList) { PropertyInfo pi = typeof(Values) .GetProperty(myTypeString, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | // private/internal/protected System.Reflection.BindingFlags.Public); // property exists, can be read and returns DateTime if (null == pi) return; // or throw exception else if (!pi.CanRead) return; // or throw exception else if (pi.PropertyType != typeof(DateTime)) return; // or throw exception foreach(var type in typeList .Where(x => (DateTime) (pi.GetValue(x, null)) > DateTime.Now)) { //do my loop } }

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