下面是一个DataEnum类，有些问题，请LIVE41指点，谢谢！！！请问你一般用QQ或者是MSN么？想交个朋友，多多的的请教下！谢谢！！1
using System;
using System.Xml;
namespace Exceed.Data
{
/// <summary>
/// DataEnum 的摘要说明。
/// </summary>
public class DataEnum:DataList
{
#region 构造函数
/// <summary>
/// 空的DataEnum构造函数
/// </summary>
public DataEnum():base()
{
this.Type="Enum"; //this是代表当前我调用该方法的页面么？Type参数是说明该类是枚举类型的，是么？为什么Enum要用“”呢？
this.Init(); //init方法是用来初始化的么？具体有什么用呢？
}
/// <summary>
/// 根据XML字符串构造DataEnum
/// </summary>
/// <param name="xmlsrc"></param>
public DataEnum(string xmlsrc):base(xmlsrc) //有构造一个带参数的类，有什么用么？根据你的经验，请解释下？谢谢！！！
{
this.Type="Enum";
}
/// <summary>
/// 根据XmlElement构造DataEnum
/// </summary>
/// <param name="ele"></param>
public DataEnum(XmlElement ele):base(ele)
{
this.Type="Enum";
}
/// <summary>
/// 根据DataEnum构造新的DataEnum
/// </summary>
/// <param name="ele"></param>
public DataEnum(DataEnum dataEnum):base(dataEnum.ToString()) //dataEnum.ToString()是把枚举值转换为字符型的么？
{
this.Type="Enum";
}
/// <summary>
/// 根据XmlDocument和XmlElement构造DataEnum
/// </summary>
/// <param name="doc"></param>
/// <param name="ele"></param>
internal DataEnum(XmlDocument doc,XmlElement ele):base(doc,ele)
{
this.Type="Enum";
}
#endregion
#region 共有方法
/// <summary>
/// 添加子节点
/// </summary>
/// <param name="text"></param>
/// <param name="value"></param>
/// <returns></returns>
public DataItem AddItem(string text,string value) //能把下面的这些方法都解释清楚点么？有些引用的方法不清楚，谢谢！！！
{
XmlElement node=this.XmlDoc.CreateElement("Item");
this.XmlEle.AppendChild(node);
node.SetAttribute("Text",text);
node.SetAttribute("Value",value);
return new DataItem(this.XmlDoc,node);
}
/// <summary>
/// 新建子节点
/// </summary>
/// <returns></returns>
public new DataItem NewItem()
{
XmlElement node = this.XmlDoc.CreateElement("Item");
this.XmlEle.AppendChild(node);
return new DataItem(this.XmlDoc,node);
}
/// <summary>
/// 根据text获得子节点的值
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public string GetValue(string text)
{
XmlElement node=null;
node = (XmlElement)this.XmlEle.SelectSingleNode("Item[@Text='"+text+"']");
if(node==null)return null;
return DataStore.FilterNull(node.GetAttribute("Value"));
}
/// <summary>
/// 根据设置子节点的值
/// </summary>
public void SetValue(){}
/// <summary>
/// 根据value获得子节点的text
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public string GetText(string value)
{
XmlElement node=null;
node = (XmlElement)this.XmlEle.SelectSingleNode("Item[@Value='"+value+"']");
if(node==null)return null;
return DataStore.FilterNull(node.GetAttribute("Text"));
}
/// <summary>
/// 根据index获得SubEnum
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
public string GetSubEnum(int index)
{
XmlElement node;
node = (XmlElement)this.XmlEle.ChildNodes[index];
if(node==null)return null;
string se=null;
if(node!=null)se = node.GetAttribute("SubEnum");
if(se.Trim()=="")return null;
return se;
}
/// <summary>
/// 根据枚举值value获得SubEnum
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public string GetSubEnum(string value)
{
XmlElement node;
node = (XmlElement)this.XmlEle.SelectSingleNode("Item[@Value='"+value+"']");
if(node==null)return null;
string se=null;
if(node!=null)se = node.GetAttribute("SubEnum");
if(se.Trim()=="")return null;
return se;
}
/// <summary>
/// 根据dataItem获得SubEnum
/// </summary>
/// <param name="dataItem"></param>
/// <returns></returns>
public string GetSubEnum(DataItem dataItem)
{
XmlElement node;
node = dataItem.XmlEle;
if(node==null)return null;
string se=null;
if(node!=null)se = node.GetAttribute("SubEnum");
if(se.Trim()=="") return null;
return se;
}
/// <summary>
/// 获取数据属性列
/// </summary>
/// <returns></returns>
public new string GetFields()
{
return null;
}
/// <summary>
/// 设置数据属性列
/// </summary>
public void SetFields(){}
/// <summary>
/// 根据name克隆DataEnum对象
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public new DataEnum Clone(bool includeChild)
{
XmlNode node=this.CloneNode(includeChild);
return new DataEnum(this.XmlDoc,(XmlElement)node);
}
/// <summary>
/// 根据name克隆DataEnum对象
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public new DataEnum Clone(string name)
{
XmlNode node=this.CloneNode(name);
return new DataEnum(this.XmlDoc,(XmlElement)node);
}
#endregion
}
}
