下面是一些完全工作的代码,包括可选调用参数:
private static string Call(object callByAttribute, string name, object[] args)
{
PropertyInfo prop = callByAttribute.GetType().GetProperties()
.Where(p => p.IsDefined(typeof(CodeNameAttribute), false))
.SingleOrDefault(p => ((CodeNameAttribute)(p.GetCustomAttributes(typeof(CodeNameAttribute), false)).First()).Name == name);
if (prop != null)
return (string)callByAttribute.GetType().InvokeMember(prop.Name, BindingFlags.GetProperty, null, callByAttribute, null);
MethodInfo method = callByAttribute.GetType().GetMethods()
.Where(p => p.IsDefined(typeof(CodeNameAttribute), false))
.SingleOrDefault(p => ((CodeNameAttribute)(p.GetCustomAttributes(typeof(CodeNameAttribute), false)).First()).Name == name);
if (method != null)
return (string)callByAttribute.GetType().InvokeMember(method.Name, BindingFlags.InvokeMethod, null, callByAttribute, args);
throw new Exception("method/getter not found");
}
private static string Call(object callByAttribute, string name)
{
return Call(callByAttribute, name, null);
}
这可以在一个完整的程序中使用这样的:
using System;
using System.Linq;
using System.Reflection;
namespace ConsoleApplication1
{
public class CallByAttribute
{
[CodeName("Foo")]
public string MyProperty { get; set; }
[CodeName("Bar")]
public string MyMethod(int someParameter)
{
return "blah" + someParameter;
}
}
public class CodeNameAttribute : Attribute
{
private readonly string name;
public CodeNameAttribute(string name)
{
this.name = name;
}
public string Name
{
get { return name; }
}
}
class Program
{
static void Main(string[] args)
{
CallByAttribute callByAttribute = new CallByAttribute();
callByAttribute.MyProperty = "hi";
Console.WriteLine(Call(callByAttribute, "Bar", new object[] {1}));
Console.WriteLine(Call(callByAttribute, "Foo"));
}
private static string Call(object callByAttribute, string name)
{
return Call(callByAttribute, name, null);
}
private static string Call(object callByAttribute, string name, object[] args)
{
PropertyInfo prop = callByAttribute.GetType().GetProperties()
.Where(p => p.IsDefined(typeof(CodeNameAttribute), false))
.SingleOrDefault(p => ((CodeNameAttribute)(p.GetCustomAttributes(typeof(CodeNameAttribute), false)).First()).Name == name);
if (prop != null)
return (string)callByAttribute.GetType().InvokeMember(prop.Name, BindingFlags.GetProperty, null, callByAttribute, null);
MethodInfo method = callByAttribute.GetType().GetMethods()
.Where(p => p.IsDefined(typeof(CodeNameAttribute), false))
.SingleOrDefault(p => ((CodeNameAttribute)(p.GetCustomAttributes(typeof(CodeNameAttribute), false)).First()).Name == name);
if (method != null)
return (string)callByAttribute.GetType().InvokeMember(method.Name, BindingFlags.InvokeMethod, null, callByAttribute, args);
throw new Exception("method/getter not found");
}
}
}
看起来你需要'CodeName'的一个伴侣'Attribute'类;这是真的,还是你可以只反映一下属性来获取每个的CodeName? – 2010-09-14 04:11:07
Robert:假设你已经有了一个'CodeNameAttribute'类,否则你将无法执行'[CodeName(“foo”)]',因为这实际上导致了一个'CodeNameAttribute'对象的实例化。 – Gabe 2010-09-14 04:13:30
如果您打算使用这些代码名(数千次或数百万次),您需要将属性查找的结果缓存为可在字典中查找的代理。 – Gabe 2010-09-14 05:47:29