我做的search object

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace JoeySearchObject
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //UniversalSearchObject uso = UniversalSearchObject.Create(UniversalSearchAttribute.ChildClassEnum.UserIDSearchObject);
            UniversalSearchObject uso = UniversalSearchObject.Create("UserIDSearchObject");
            uso.SetSearchParameter("UserID", 1);
            this.label1.Text += uso.Search()[0].ToString()+" ";
            //uso = UniversalSearchObject.Create(UniversalSearchAttribute.ChildClassEnum.UserNameSearchObject);
            uso = UniversalSearchObject.Create("UserNameSearchObject");
            uso.SetSearchParameter("UserName", "Joey");
            this.label1.Text += uso.Search()[0].ToString();
        }
    }
}

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

namespace JoeySearchObject
{
    [AttributeUsage(AttributeTargets.Class)]
    public class UniversalSearchAttribute : Attribute
    {
        public enum ChildClassEnum
        {
            UserIDSearchObject,
            UserNameSearchObject
        }

        public ChildClassEnum[] Children { get; set; }

        public UniversalSearchAttribute()
        {
            this.Children = null;
        }

        public UniversalSearchAttribute(ChildClassEnum[] Children)
        {
            this.Children = Children;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using System.Reflection;
namespace Entities
{
    public abstract class UniversalSearchObject
    {
        "instance method"#region "instance method"
        public abstract ArrayList Search();
        #endregion

        "static methods"#region "static methods"
        "Create"#region "Create"
        public static UniversalSearchObject Create(String childClass)
        {
            UniversalSearchObject uso = null;
            String Namespace = typeof(UniversalSearchObject).Namespace;
            Module module = typeof(UniversalSearchObject).Module;
            uso = (UniversalSearchObject)Activator.CreateInstance(module.GetType(Namespace + "." + childClass));
            return uso;
        }
        #endregion

        "SetSearchParameter"#region "SetSearchParameter"
        public void SetSearchParameter(string parameterName, object parameterValue)
        {
            Type type = this.GetType();
            type.GetProperty(parameterName).SetValue(this, parameterValue, null);
        }
        #endregion

        "GetResultParameter"#region "GetResultParameter"
        public object GetResultParameter(string parameterName)
        {
            Type type = this.GetType();
            return type.GetProperty(parameterName).GetValue(this, null);
        }
        #endregion
        #endregion
    }
}

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

namespace JoeySearchObject
{
    public class UserIDSearchObject : UniversalSearchObject
    {
        public int UserID { set; get; }

        public override ArrayList Search()
        {
            ArrayList al = new ArrayList();
            al.Add(this.UserID);
            return al;
        }
    }
}

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

namespace JoeySearchObject
{
    public class UserNameSearchObject : UniversalSearchObject
    {
        public string UserName { set; get; }

        public override ArrayList Search()
        {
            ArrayList al = new ArrayList();
            al.Add(this.UserName);
            return al;
        }
    }
}