CSharp/Ivy/IvyPPC/IvyBindingAttribute.cs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

using System;
using System.Collections.Generic;
using System.Text;

namespace IvyBus
{
    [AttributeUsage(AttributeTargets.Method,AllowMultiple = true)]
    public sealed class IvyBindingAttribute : Attribute
    {
        private string expression;
        private string[] args;

        // translate part of expression to object property
        public string GetExpression(object obj)
        {
            if (obj == null) return string.Format(expression);
            string[] values = new string[args.Length];
            for (int i = 0; i < args.Length; i++)
            {
                values[i] = (string)obj.GetType().GetProperty(args[i]).GetValue(obj,null);
            }
            return string.Format(expression,values);
        }

        public IvyBindingAttribute(string expression, params string[] args)
        {
            this.expression = expression;
            this.args = args;
        }
    }
}