Attribute/特性心得隨筆

復制代碼 代碼如下:
<p>/*</p><p>*特性</p><p>*/</p>

復制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// DisAttribute 的摘要說明
/// </summary>
public class DisAttribute : Attribute
{
private string _message;
/// <summary>
/// 描述
/// </summary>
public string Message
{
get { return _message; }
}

public DisAttribute(string message)
{
this._message = message;
}
}

/*

*類

*/
復制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.EnterpriseServices;
using System.Linq;
using System.Web;
using System.Web.DynamicData;


/// <summary>
/// User 的摘要說明
/// </summary>
[DisAttribute("User"),TableName("user"),Description("user")]
public class User
{
private int? _id;
/// <summary>
/// Id
/// </summary>
[DisAttribute("主鍵")]
public int? Id
{
get { return _id; }
set { _id = value; }
}


private string _name;
/// <summary>
/// 名稱
/// </summary>
[DisAttribute("名稱")]
public string Name
{
get { return _name; }
set { _name = value; }
}
}

/*

*獲取

*/
復制代碼 代碼如下:
//獲取特性
User u = new User();
Type _t = u.GetType();
foreach (Attribute a in _t.GetCustomAttributes(true))
{
if (a.GetType().ToString() == "DisAttribute")
{
DisAttribute _da = (DisAttribute)a;
if (_da != null)
{
Response.Write(_da.Message + "<br>");
}
}
}
//獲取所有屬性
u.Id = 888888;
u.Name = "陳奕迅";
foreach (PropertyInfo item in _t.GetProperties())
{
//特性
Attribute atr = item.GetCustomAttribute(typeof(DisAttribute));
if (atr.GetType().ToString() == "DisAttribute")
{
DisAttribute _da = (DisAttribute)atr;
if (_da != null)
{
Response.Write(_da.Message + "<br>");
}
}
}