我知道怎么做:
Expression body = Expression.Call(selector.Body,"Contains",null,Expression.Constant("cats",typeof(string)));
由于’contains’返回true / false,因此没有问题.
但是,我如何进行IndexOf并查看结果是否大于5?
Expression body = Expression.Call(selector.Body,"IndexOf",typeof(string)));
解决方法
随着
Expression.GreaterThan
:
Expression body = Expression.GreaterThan( Expression.Call(selector.Body,Expression.Constant("cats")),Expression.Constant(5) );