获得某一枚举的描述，将所有枚举的描述绑定到DropDonw代码,Asp.Net代码库,德仔网

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【Asp.Net】获得某一枚举的描述，将所有枚举的描述绑定到DropDonw
作者:Dezai.CN / 发布于2011/8/23/ 721
<div>
//以下是方法类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Reflection;
using System.Web.UI.WebControls;
using System.Collections;
namespace SPDocWebTest
{
public class RemarkAttribute : System.Attribute
{
private string _Author = string.Empty;
private string _Description = string.Empty;
private string _Url = string.Empty;

/// <summary>
/// 构造方法
/// </summary>
public RemarkAttribute()
{
}
/// <summary>
/// 构造方法
/// </summary>
/// <param name="description">描述</param>
public RemarkAttribute(string description)
{
_Description = description;
}

/// <summary>
/// 构造方法
/// </summary>
/// <param name="author">作者</param>
/// <param name="description">描述</param>
/// <param name="url">相关的Url</param>
public RemarkAttribute(string author, string description, string url)
{
_Author = author;
_Description = description;
_Url = url;
}

/// <summary>
/// 描述作者
/// </summary>
public string Author
{
get
{
return _Author;
}
set
{
_Author = value;
}
}
/// <summary>
/// 描述
/// </summary>
public string Description
{
get
{
return _Description;
}
set
{
_Description = value;
}
}
/// <summary>
/// 相关的Url
/// </summary>
public string Url
{
get
{
return _Url;
}
set
{
_Url = value;
}
}

/// <summary>
/// 得到某一个枚举项的RemarkAttribute
/// </summary>
/// <param name="en">枚举项</param>
/// <returns>RemarkAttribute对象</returns>
private RemarkAttribute GetRemarkAttributeFromEnumItem(System.Enum en)
{
Type type = en.GetType();
FieldInfo f = type.GetField(en.ToString());
RemarkAttribute ra = (RemarkAttribute)Attribute.GetCustomAttribute(f, typeof(RemarkAttribute));
return ra;
}
/// <summary>
/// 得到某一个枚举项的Remark描述
/// </summary>
/// <param name="en">枚举项</param>
/// <returns>Remark的描述</returns>
private string GetRemarkStringFromEnumItem(System.Enum en)
{
RemarkAttribute ra = GetRemarkAttributeFromEnumItem(en);
string strDesp = string.Empty;
if (ra != null)
strDesp = ra.Description;
else
strDesp = en.ToString();
return strDesp;
}
/// <summary>
/// 根据当前枚举值获取Remark值
/// </summary>
/// <param name="enumType">类型</param>
/// <param name="enumValue">值</param>
/// <returns></returns>
public string GetEnumName(Type enumType, string enumValue)
{
return GetRemarkStringFromEnumItem(
(Enum)Enum.Parse(enumType, enumValue));
}
#region 使用枚举说明来填充下拉列表
/// <summary>
/// 使用枚举说明来填充下拉列表。
/// </summary>
/// <param name="ddl">下拉列表控件。</param>
/// <param name="enumType"></param>
public void SetEnumDropDownList(DropDownList ddl, Type enumType)
{
string[] nameList = Enum.GetNames(enumType);
Array valueList = Enum.GetValues(enumType);
for (int i = 0; i < nameList.Length; i++)
{
string typeName = GetRemarkStringFromEnumItem(
(Enum)Enum.Parse(enumType, nameList[i]));
string typeValue = ((int)((IList)valueList)[i]).ToString();
ddl.Items.Add(new ListItem(typeName, typeValue));
}
}
#endregion
}
}
//以下是枚举
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace SPDocWebTest
{
public enum testenum
{
[Remark("aa")]
t1=1,
[Remark("bb")]
t2=2
}
}
//调用方法事例
protected void Page_Load(object sender, EventArgs e)
{
RemarkAttribute ra=new RemarkAttribute();
Response.Write(ra.GetEnumName(typeof(testenum),"1"));//枚举类型是testenum，值是1

DropDownList dd = new DropDownList();
ra.SetEnumDropDownList(dd, typeof(testenum));
form1.Controls.Add(dd);
}
</div>
试试其它关键字
　绑定到DropDonwList　
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