public static void VisitRun()
{
int age = 100;
VisitDemo other = new VisitDemo()
{
Age = 99
};
Expression <Func <VisitDemo, bool> > expr = v => v.Name.Contains("test") && v.Birthday >= DateTime.Now && v.Age <age || age> other.Age;
Console.WriteLine(expr.Type);
Console.WriteLine(expr.NodeType);
Console.WriteLine(expr.Body.NodeType);
// 判断是值类型后直接取出值，可用作 SQL 里面的字面量。
var lambda = Expression.Lambda(((expr.Body as BinaryExpression).Right as BinaryExpression).Left as MemberExpression).Compile();
Console.WriteLine(lambda);
Console.WriteLine(lambda.DynamicInvoke());
OtherScope(Expression.Lambda(((expr.Body as BinaryExpression).Right as BinaryExpression).Right as MemberExpression).Compile());
Console.ReadLine();
}
static void Main(string[] args)
{
//SimpleDemo.SimpleRun();
VisitDemo.VisitRun();
}
